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Space Elevator Rebuttal From LiftPort Founder

TropicalCoder is the reader who submitted the story about the possible demise of LiftPort a couple of weeks back. The resulting discussion was mostly negative about the feasibility of building a space elevator. TropicalCoder writes: "At one point during the discussion, LiftPort founder Michael J. Laine personally entered the discussion, but for the most part remained invisible since he hadn't logged in. I responded to his comment that if he would like a chance to rebut the criticisms, he should contact me and I would undertake to interview him and post the resulting story on Slashdot." Read below for the story of how Mr. Laine's detailed reply and rebuttal to that Slashdot discussion came about. TropicalCoder asks, "After reading LiftPort's rebuttal to Slashdot critics, do any of you now feel your pessimism somewhat dispelled?"
Michael Laine called me long distance via cell phone that very day from his back yard near Seattle, and spoke with me for over an hour. Michael came across as a rather sober, likable fellow, not at all like the crackpot image one would conjure up from reading many of the Slashdot comments. He was clearly wounded by the stinging criticisms in the Slashdot discussion, and I couldn't help empathizing with him. Here was man who had put his money where his mouth was, risking everything on his dream, perhaps suffering his darkest hour, and enduring ridicule on top of that.

At no point during the conversation did I get any impression of a huckster who would sell you the Brooklyn Bridge, something that I was on the lookout for. It was clear to me that he sincerely believes in what he is doing. Whether he succeeds in the end or not, I would prefer to call him a "visionary." After all, for every great visionary you can recall from history, there must have been a thousand others who tried and failed, but are no less visionary because of that. The jury is still out on LiftPort, and rumors of their death would be premature. They continue their research, and as I write are preparing for the "Tethered Towers" demo on Thursday June 28.

At the end of the conversation it was agreed that I would summarize the Slashdot discussion for him and offer him an opportunity for point-by-point rebuttal. I completed this summary (in which many Slashdot readers will recognize their own words), and sent it off to him the next day. He acknowledged receipt and promised an answer shortly. A few weeks passed, and I imagined that he must have decided in the end that the criticisms were so severe, perhaps it would be best just to try to forget it. It was a total surprise to me when a thoroughly detailed response arrived in my mailbox today, demonstrating that the people at LiftPort at least are still convinced that building a space elevator is possible.

Space elevator themes have been celebrated in science fiction and many Slashdot readers have shared the dream, only to become disillusioned with the apparent pending demise of LiftPort. After reading LiftPort's rebuttal to Slashdot critics, do any of you now feel your pessimism somewhat dispelled?"

368 comments

  1. Good Writeup! by kspn78 · · Score: 3, Interesting

    I really enjoyed the writeup and the interview. I thought that it covered the points in a very concise fashion while also outlining all the points that had been raised in aa very negative manner. I look forward to following this project and its future directions.

    --
    No Coffee, No Workee
    1. Re:Good Writeup! by Doc+Daneeka · · Score: 2, Interesting
      He may have covered the easy topics, but he failed to even skim the surface on the structural integrity questions that will come up.

      Materials exist today that are strong enough and light enough to support the weight of the lifter and itself. If that is so, can the structure sustain the drag forces of the jet stream? What about the linear and volumetric expansion coefficients? Over a structure this large, are you absolutely certain the large differences in temperatures will not cause the structural integrity to degrade rapidly or pose a significant risk due to changes in enthalpy over large periods of time? Have you taken into account the part of the structure in space that will absorb solar radiation unlike another cross section a small distance lower that would not absorb as much radiation? Do you have plans on how to dissipate the built up energy due to lightning strikes? Will that current go to ground first or will it jump to the cargo and/or electrical systems? Those are just a few of the questions that came to mind. They may have already been answered elsewhere but I did not find them in his rebuttal or a quick search of the web. Feel free to answer these if you can.
    2. Re:Good Writeup! by kspn78 · · Score: 1

      I think that if they had all the answers then they would be building the Space Elevator now rather than a planned finish date of around 25 years!

      --
      No Coffee, No Workee
    3. Re:Good Writeup! by lessthan · · Score: 1

      So, ummm... you didn't read the article or any of the background material. Nice. The two I know are: the jet stream - they plan to build toward the equator, out of reach of all three jets and the lightening - the ground station isn't going to be on the ground, the plan is to create a sea-going station, plus in some areas thunderstorms are nearly non-existent. I know that that wasn't a complete answer on the lightening, but I'm just going on what I remember.

      --
      Space Shuttle was a program that strapped humans to an explosion and tried to stab through the sky with fire and math
    4. Re:Good Writeup! by Doc+Daneeka · · Score: 1

      If they had all these answers, then they would be able to more effectively describe the material to be synthesized in order to build the tower.

    5. Re:Good Writeup! by Doc+Daneeka · · Score: 2, Interesting
      I'm sorry but there is barely any in-depth material in the article or anything that can be viewed as actual information on their website. The information I'm taking about isn't the mission statements or the generic drivel that every company shells out, it's the information that can be used to actually generate some of the forces a structure like this will undergo.

      The two I know are: the jet stream - they plan to build toward the equator, out of reach of all three jets and the lightening - the ground station isn't going to be on the ground, the plan is to create a sea-going station, plus in some areas thunderstorms are nearly non-existent. I know that that wasn't a complete answer on the lightening, but I'm just going on what I remember. Alright, maybe I didn't elaborate. The structure will undergo tremendous stress due to the combined, and variable, drag forces over the entire structure. It doesn't take thunderstorms to build up electrical charge. Take a piece of metal and move it through an electric field, such as one generated by the earth, and you will build up charge. Which order of magnitude of a path is easier to take: 10^8 m of carbon nano-tubing or 10^0 m of air? While these questions may seem laughable, the engineers working on this project need to literally take everything into account while in the design process. To expect anything less is to invite disaster to the project. I have other questions I'd like to have answered but I'll just leave it at these before I start "reaching" a bit.
    6. Re:Good Writeup! by Bastard+of+Subhumani · · Score: 1

      WTF? As if this kite-on-steroids idea isn't daft enough to start with, they're going to attach it to a boat?

      --
      Only three things are certain; death, taxes, and apocryphal quotations - Ben Franklin.
    7. Re:Good Writeup! by lessthan · · Score: 1

      I admit ignorance and apologize for being rude.

      --
      Space Shuttle was a program that strapped humans to an explosion and tried to stab through the sky with fire and math
    8. Re:Good Writeup! by Doc+Daneeka · · Score: 1

      It's fine. I understand why you would want something as exciting as breakthrough like this to make headway. It sounds really cool. The only thing that should trouble you about the company is the remarkably small amount of actual information on their site. Too much Public Relation mumbo jumbo, not enough Engineering specifications. :-/

    9. Re:Good Writeup! by bodan · · Score: 2, Funny
      Yeah, right, good thinking. If I'd build a one hundred thousand kilometers long ribbon of the strongest materials known to man and place it in geostationary orbit, I'd damn right make sure it's safely attached to the ground.

      I mean, a boat could... rock around? drift away? you're afraid the space elevator would sink? get lost? got wet? Think, people!

      --
      "I think I am a fallen star. I should wish on myself."
    10. Re:Good Writeup! by Rei · · Score: 1

      Take a piece of metal and move it through an electric field, such as one generated by the earth, and you will build up charge.

      Space elevators are geostationary. Of course, they'll have oscillations (induced by troposphere winds, climbers, the moon, etc), but when it comes to oscillation, building up a charge would be a *good* thing. It'd act as damping. It's not like something with such a tremendous length with razor-sharp edges would have any sort of trouble getting rid of the charge through coronal discharge to the ionosphere.

      All of this sort of stuff has been considered before in Dr. Edwards' paper. Sadly, the one key, critical issue is skimmed over: strong enough SWNTs. This is the only real limiting factor on a space elevator, and it may well make a space elevator (at least for Earth) physically impossible.

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    11. Re:Good Writeup! by Rei · · Score: 1

      All of that sort of stuff has already been covered. The only real problem is the (possibly insurmountable) issue of cable strength.

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    12. Re:Good Writeup! by PhoenixOr · · Score: 2, Interesting

      The floating platform in on purpose. If you attach it to the ground you end up with a nice spring that is going to build up all sort of strong oscillations.

    13. Re:Good Writeup! by ArsonSmith · · Score: 1

      Have the ribbion woven in several strands. Each trip up, add a new strand to one side of the ribbion, then on the trip down remove a strand from the other side. inspect and re certify and/or make new strands as needed.

      Brand new ribbon every 'x' trips.

      --
      Paying taxes to buy civilization is like paying a hooker to buy love.
    14. Re:Good Writeup! by ArsonSmith · · Score: 1

      Having all the answers to do something is a quite a bit different then having all the money.

      --
      Paying taxes to buy civilization is like paying a hooker to buy love.
    15. Re:Good Writeup! by fyngyrz · · Score: 1
      Too much Public Relation mumbo jumbo, not enough Engineering specifications. :-/

      One thing to keep in mind is that such information is the core of a company's ability to deliver a product; if they share it, then other companies can use that information without having to put out for the research, thus providing a competitive advantage.

      I would think that, having done the research and (hopefully) produced a product, these people would prefer that any competitors start with the same disadvantages they had. That provides a buffer in time for profiting from their work. It's just basic economics.

      My company makes interesting products as well; on the web site, we talk about the results you can achieve, the things you can do — nowhere do we explain to you how we get these things done. Commercial efforts often have this characteristic in common.

      --
      I've fallen off your lawn, and I can't get up.
    16. Re:Good Writeup! by dbrutus · · Score: 1

      Before some guy in a lab in Japan found carbon nanotubes in the early '90s talk about space elevators had to deal in vague discussions about "unobtanium". There simply wasn't anything with even the theoretical strength necessary. Next week, some guy in a lab in Latvia might discover something else that can practically form an elevator. You just don't know. Now that we have at least one material that might be made to work, it makes sense to start working on all of the *other* major problems that need to be solved before an elevator goes up.

    17. Re:Good Writeup! by Rei · · Score: 1

      And exactly what sort of bond significantly stronger per unit mass than the graphene SP2 do you think is possible to exist?

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    18. Re:Good Writeup! by dbrutus · · Score: 1

      I haven't the foggiest what would be a stronger bond, however I wouldn't have come up with carbon nanotubes either so my inability doesn't mean much. If this company ends up making really good climbers, makes practical power beaming a reality and nothing else (ie no space elevator) they still have a shot at turning a decent return on investment and also making the world a better place in the meantime.

  2. WHy Yes by inKubus · · Score: 2, Funny

    do any of you now feel your pessimism somewhat dispelled

    Why yes, I do believe my spirit has elevated. My feelings on the matter have definitely been lifted.

    --
    Cool! Amazing Toys.
  3. Ok, here's my comment by QuantumG · · Score: 4, Insightful

    Me: The Space Elevator is a glorious technology that may one day be built by an advanced human civilization, and when it is, it will be a modern world wonder.. but that day is not today.. it's probably not even in the next 30 years.

    LiftPort: We disagree. So far as our official road map is concerned, we are on schedule - and in fact, we are even a little ahead of schedule on some projects.


    Ok, that's great, but you're the ones making this amazing claim that you could build a space elevator today if only you had the money. Amazing claims require amazing proof. Your official road map doesn't exactly cut it.

    --
    How we know is more important than what we know.
    1. Re:Ok, here's my comment by Anonymous Coward · · Score: 0

      Guess what, you can be the one to give them that money so they can do it! Give them the money and let them work, they've stated their limitation of providing the good, unless you want to meet that how can they logically prove it? Also if you read the entire piece you would note that they also suggest other issues with building it tomorrow (such as beauraucratic red tape). You've obviously read enough to copy and paste though. Well done for reading that much.

    2. Re:Ok, here's my comment by AoT · · Score: 2, Insightful

      You missed the point. They don't need a space elevator for their business plan to succeed, just the technologies that they are/will developing. That tech moves us closer to an SE, and it is profit generating in the short term.

    3. Re:Ok, here's my comment by QuantumG · · Score: 1

      I read the whole thing. If they want to show that it is possible to build it with existing materials, do a paper study. Or, if one has already been done, tell me where it was published.

      If the only problem is that it would cost too much, tell us how much it would cost. Tell us how much needs to be lifted into orbit, and which orbits, and tell us how all the mirade of other problems have been solved.

      --
      How we know is more important than what we know.
    4. Re:Ok, here's my comment by Anonymous Coward · · Score: 1, Insightful

      This, my friend, is an LL#17 (though more precisely a quaint sophism rather than a true lie) that goes something like "You could get X if only you paid enough" or "you have no need for Y yet since you are not willing to pay for it."

    5. Re:Ok, here's my comment by Anonymous Coward · · Score: 0

      Why would they do that, when that's not anywhere near their business plan? It would be like asking Intel to release a 10 ghz chip, even though they wouldn't sell any, it would be slower than a dual or quad core cpu running at slower speeds, and would run hot as all hell, just because their current chips don't scale well..

    6. Re:Ok, here's my comment by QuantumG · · Score: 1

      Why would he make the claim when he can't back it up?

      It's an extraordinary claim, it requires extraordinary evidence. If you can't produce that evidence, don't make the claim.

      Unless, ya know, you want your credibility to be completely shot.

      --
      How we know is more important than what we know.
    7. Re:Ok, here's my comment by BiggerIsBetter · · Score: 3, Interesting

      More accurately, it's like asking Intel to release their trade-secret research on building 10 GHz chips, because you don't believe they're possible.

      Look, the guy said they could do it with existing technology, given the funds for 100s of heavy lift rockets (Delta-V maybe?) and A LOT of Honeywell Spectra fibre. Think for a second how much 100s of heavy lift rockets would cost, even if they could have that many made within a production timespan - that's crazy money for most anyone. But if a group of BIG companies got together (Japanese style) I reckon it's almost feasible.

      OTOH, and relating back to our Mars story, IF this cat can show big investors a serious engineering proposal for a project with existing technology, we just got our first "train station".

      --
      Forget thrust, drag, lift and weight. Airplanes fly because of money.
    8. Re:Ok, here's my comment by Anonymous Coward · · Score: 0

      Thats a futile discussion. Future inventions are mostly unpredictable, and no party can prove or disprove your 30-year claim. It's a matter of personal opinion based on knowledge in that field.

    9. Re:Ok, here's my comment by dbIII · · Score: 1

      If they want to show that it is possible to build it with existing materials, do a paper study.

      That requires engineers and scientists in the right feild and not just some random MBA or economist so they have not done it and can not do it. Seriously, Dr Horvath and his perpetual motion car that ran on water is more credible than these guys.

    10. Re:Ok, here's my comment by Rogerborg · · Score: 1

      No, genius, that's a different issue. This is what the parent is referring to:

      If it weren't for the costs, we could build one this year. Materials exist today that are strong enough and light enough to support the weight of the lifter and itself.

      Perhaps Leader Laine mis-'spoke', but that looks like a pretty crackpot claim to me. What materials, specifically what materials capable of being woven into a single 100,000km strand are available right now, today?

      Mind you, Leader Laine also makes a good fist of answering slightly different questions than the ones that were asked, so you're in good company.

      --
      If you were blocking sigs, you wouldn't have to read this.
    11. Re:Ok, here's my comment by vrmlguy · · Score: 2, Informative

      Most claims made about space elevators can be seen at the Wikipedia article, which includes detailed info about building one from steel and why it is impractical (but not impossible). I'll conceed that it's barely possible that the entire article is a plant by LiftPort, however there are a lot of links to other companies that are doing independent research. Of particular interest is Gizmonic Inc., who seem to have adopted space elevators as a corporate hobby, doing lots of spare time R&D and provided lots of calculators so you can check the math yourself. Hans Morovec wrote a research paper in 1978 investigating the feasibility of using Kelvar. Not related to your question but also interesting, Tethers Unlimited, Inc., aren't working on space elevators but are working on lots of related technology.

      --
      Nothing for 6-digit uids?
    12. Re:Ok, here's my comment by cyclomedia · · Score: 4, Insightful

      OK, OK, I know this IS slashdot but still, here goes my karma:

      What DID this guy DO to you and all the other moaning slashdotters? Yeah probably like me you grew up post-Apollo and parte-Shuttle and wanted to be an astronaut when you were a kid, so I guess you're a little bitter that the whole spage-age thing hasn't really happened. But hey, why is it all directed at these guys? Did they sneak into your room when you were a kid and molest you, promising that if you kept it a secret from mommy and daddy that you'd get the first ride into space on their space elevator?

      Are they making outlandish, unfounded claims with the sole intention of scraping money from willing idiots? Possibly, I don't know for sure, but I'd love to see a space elevator go up, and the technological and exploratory benefits to mankind that followed. So let's give these guys a chance, even if all they're doing is collecting ideas, theories and munging it together with some nice 3d graphics the more people take notice and take the idea seriously the better. But so what if they don't shit one out of their assholes tomorrow morning just for you personally to ride on, give it a rest.

      Critique, debate and peer review on any matter are always warranted but shooting insults and slander from the hip because, well, presumably you expected a LiftPort TM by 2005 and free trips to space or something is frankly unwarranted, childish and should be moderated into oblivion.

      --
      If you don't risk failure you don't risk success.
    13. Re:Ok, here's my comment by Anonymous Coward · · Score: 0

      I tried modding them down, too many dweebs modding them up before I saw your comment - DOH!

    14. Re:Ok, here's my comment by Chandon+Seldon · · Score: 1

      What materials, specifically what materials capable of being woven into a single 100,000km strand are available right now, today?

      He mentions Spectra in TFA.

      --
      -- The act of censorship is always worse than whatever is being censored. Always.
    15. Re:Ok, here's my comment by jfengel · · Score: 1

      10 GHz is a factor of two more than the present technology. The structures needed for a space elevator are a factor of a billion longer than the state of the art.

      If Intel were to announce a 10,000 GHz chip for the near future, would you believe them?

    16. Re:Ok, here's my comment by Smidge204 · · Score: 2, Interesting

      He specifically mentioned Honeywell Spectra Fiber which is billed to be "pound for pound 10 times stronger that steel"

      We need to translate that statement first. They don't mention what KIND of steel. Steel can have a tensile strength of 0.3 GPa to 1.88 GPa depending on type. That gives SF2K a tensile strength between 3.0 GPa to 18.8 GPa. (Wikipedia apparently agrees with this assessment...)

      Using Wikipedia as firther source, "A space elevator can be made relatively economically feasible if a cable with a density similar to graphite and a tensile strength of ~65-120 GPa can be mass-produced at a reasonable price." Graphite has a density of 140 lbs/cu.ft, so this imaginary material needs a minimum strength/density ratio of 65/140 = 0.46.

      SF2K has a specific gravity of 0.097, which translates to 97 kg per cubic meter (6.055 lbs/cu.ft.) That puts the strength/density ratio at 0.50 to 3.13 - Higher than our theoretical required material, so it should be strong enough.

      SF2K also has "High resistance to chemicals, water, and UV light" and "good resistance to abrasion and flex fatigue." These are all desirable qualities.

      He mentioned the ribbon would likely be "15 feet wide and less than the thickness of a human hair". Average human hair is about 4 mil (0.004 inches or 0.00033 feet). That's a theoretical cross-sectional area of 0.00495 feet. At that thickness, one pound of material will stretch just over 200 feet. They need about 62,000 miles (327,360,000 ft)of the stuff, so that's only about 820 tons. 820 really isn't THAT much in the grand scheme of things... imagine 28 standard shipping containers, that'll hold 820 tons of cargo.

      So as far as the cable itself goes - yeah, that's "doable" right now if you've got the cash.
      =Smidge=

    17. Re:Ok, here's my comment by Rei · · Score: 2, Interesting

      Spectra is a mere 3.5G GPa UTS and *950* kg per cubic meter. You converted g/cm to kg/m^3 wrong. It's not even within an order of magnitude of what is needed. Furthermore, you represented SWNTs wrong. They're SWNTs, not graphite; it's a completely different form that just happens to use the same SP2 bonding structure. Their density is about 1300 kg/m^3.

      Furthermore, while it's possible to build a space elevator with a nanotube cable that's only 65 GPa tensile, it's not realistic. It's also possible to build a space elevator out of kevlar. Your taper factor is just preposterous. LiftPort's numbers call for a SWNT fiber with strength 100-120 GPa, yet a total system cost in the tens of billions. You really can't get much lower of a strength and still have a remotely feasible business plan.

      Now, the sad truth that Laine refused to address. Early after the discovery of SWNTs, there were all sorts of wild numbers for their strength produced, most around 120 GPa. That's not the reality of the situation. Modern calculations are only for 50-60 GPa, and that matches well what has been tested by using microscopic probes to break nanotubes. But it gets worse! The tubes cluster into ropes by pi bonding and vdw, and these aren't some sort of "reverse-wrap" ropes. Their strengths are only 3.6 += 0.4 GPa. Now, this can probably be improved, but it's obviously never going to surpass, and probably never even approach, the strength of the individual tubes. However, even ropes aren't the end of the story -- then you have to produce an *affordable fabric of an indefinite length* out of them, which puts yet another strength bottleneck into play.

      Come on, Laine -- why didn't you address this? It's not like it hasn't been raised.

      I think Liftport's development process can best be summed up as:

      "In other news, my Teleporation Shoes are performing extremely well in tests. The shoelaces have survived twelve straight tying tests, including one "bunny ears" test conducted by a young child. Sole durability tests are also holding up well. Teleporation will be tested at some time in the future."

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    18. Re:Ok, here's my comment by drinkypoo · · Score: 1

      Ok, that's great, but you're the ones making this amazing claim that you could build a space elevator today if only you had the money. Amazing claims require amazing proof. Your official road map doesn't exactly cut it.

      I'm sure that if you give them the money, they will be happy to begin construction. Your non-tax-deductible donation of 3.7 trillion dollars is eagerly awaited.

      Signed, Reality

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    19. Re:Ok, here's my comment by Rei · · Score: 2, Interesting

      It's *possible* for a spectra elevator to exist, but that doesn't mean anything. Plugging Spectra's strength and density (3.5e9 N/m^2 and 950 kg/m^3) into Spelsim, using a payload mass of two tonnes and a safety factor of only 2, we get an elevator mass of 9.8745e17 kg. That's 987,450,000,000,000,000 kg: just about a quadrillion metric tonnes. By comparison, Mars's largest moon (Phobos) is about 1/10th that mass. I've seen the mass of Mount Everest cited as about 1e14kg (1/10000th the mass), all living organisms at 1e15kg (1/1000th the mass), the water in the atmosphere and the total biomass aboveground at 1e16kg (1/100th the mass), all of the surface freshwater at 1e17 kg (1/10th the mass), and the entire stratosphere at 1e18kg (same mass)

      Think you can launch that?

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    20. Re:Ok, here's my comment by Smidge204 · · Score: 1

      Spectra is a mere 3.5G GPa UTS and *950* kg per cubic meter [elevator2010.org]. You converted g/cm to kg/m^3 wrong. It's not even within an order of magnitude of what is needed. Furthermore, you represented SWNTs wrong. They're SWNTs, not graphite; it's a completely different form that just happens to use the same SP2 bonding structure. Their density is about 1300 kg/m^3.


      I said between 3.0 GPa and 18.8 GPa, so we agree there.

      Honeywell's site lists the fiber's SG as 0.097. The site you linked to lists it as 0.97. They disagree by a factor of 10. I used the number from the Honeywell site, thus arriving at 97 kg/m^3. While it's not impossible for it to be wrong, I don't think it's unreasonable to assume the manufacturer's posted data is correct... at least for these types of back-of-the-envelope quality calculations.

      =Smidge=
    21. Re:Ok, here's my comment by Rei · · Score: 1

      Do you realize how light 97 kg/m^3 is? That's the density of styrofoam and balsa wood. There's absolutely no way it's that light. It should be pretty obvious that no high strength polyethylene fiber is going to have that sort of density.

      I'm googling Honeywell's site looking for spectra. I'm seeing "pound for pound, ten times as strong as steel" (which would indicate 950 kg/m^3); made of "ultra-high molecular weight polyethylene" (unless it's foamed -- a stupid idea for a fiber -- that would mean 950kg/m^3). And so on.

      Here's what it looks like happened: 950kg/m^3 is 0.95g/m^3. Divided by *gravity* (9.8m/s^2), gives.. wait for it... 0.097. The exact number listed on that info page. They then reported this as "specific gravity".

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    22. Re:Ok, here's my comment by Rei · · Score: 1

      Here's a link for Dyneema from the manufacturer (Dyneema is, essentially, Spectra): 0.97 specific gravity reported.

      (oh, and I just realized that I said 0.95 before; that should have been 0.97. But whatever)

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    23. Re:Ok, here's my comment by Smidge204 · · Score: 1

      "pound for pound, ten times as strong as steel" (which would indicate 950 kg/m^3)

      That statement does not in any way indicate how dense the material is, only how strong it is compared to another material. Neither does "ultra-high molecular weight polyethylene" - that only indicates the weight of the materia at the molecular level, not the actual density.

      I'm not disagreeing that the value is wrong, only that there is little to indicate the value is blatantly wrong. At least to me, since I'm not a chemist or expert in plastics. Maybe you are, and so it's obvious to you... but I see the material is more dense than air and less dense than water so I had little reason to immediately suspect it. *shrug*
      =Smidge=

    24. Re:Ok, here's my comment by ArsonSmith · · Score: 1

      I just wanted my 0.02's worth.

      --
      Paying taxes to buy civilization is like paying a hooker to buy love.
    25. Re:Ok, here's my comment by Rei · · Score: 1

      That statement does not in any way indicate how dense the material is, only how strong it is compared to another material.

      Oh, but it does: "pound for pound". That means one pound of this is ten times as strong as a pound of steel. While steels do vary in strength, there is no steel nearly so strong as you would need for the density to be 0.097 g/cm^3.

      Neither does "ultra-high molecular weight polyethylene" - that only indicates the weight of the materia at the molecular level, not the actual density.

      The key issue is not the "ultra-high molecular weight" part -- it's the polyethylene part. I'm sure you're familiar with polyethylene. It's one of the most widely used plastics in the world -- HDPE is recycling number 2, and LDPE number 4. Seen them all over the place, right? Note how they're not anywhere close to as light as styrofoam? There's a reason for that; they're not foamed. No non-foamed plastic will have a density that low.

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    26. Re:Ok, here's my comment by 2short · · Score: 0


      Well, my comment is one of the first quoted in his "rebuttal", so I'll try to answer your question:

      He didn't do anything to me. I had barely ever heard of the guy, and my comment wasn't even directed at him or his company. It was a response to another slashdot commenter which he pulled out of context in order to rebut a point I wasn't making.

      Having now actually read what these guys are saying, this appears to be par for the course. They aggressively belittle the arguments of anyone who dares to question their own ludicrously optimistic declarations on the state of space elevator technology, or the economic case for building one.

      They appear to actually believe it themselves, and aren't collecting all that much of other peoples money, so I don't criticize them on that account.

      But anyone who suggests a space elevator may not be as feasible or desirable as they assert is immediately dubbed a small-minded nay-sayer. A quick suggestion is made that we would say the same thing to some past inventor who made some tiny incremental change to something, as if the space elevator were similarly close.

      "Critique, debate and peer review on any matter are always warranted but shooting insults and slander from the hip ... is frankly unwarranted, childish and should be moderated into oblivion."

      Yes, that sums up my problem with them nicely.

    27. Re:Ok, here's my comment by Rei · · Score: 1

      Oh, by the way -- I have a big wheel of HDPE at home (1" thick, about a meter in diameter) which I bought for making a Wimshurst machine (that reminds me... I never did finish that machine...). It's actually surprisingly heavy; bent the PVC that I mounted it on without a problem. I'd have to guess perhaps 40 lbs. HDPE is about 0.95g/cm^3 (sound familiar?). LDPE is 0.92g/cm^3.

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    28. Re:Ok, here's my comment by skotte · · Score: 1

      And no explorer has ever made ridiculous claims about technology which could never work.

      It is believed Sweden's S. A. Andrée was pressured into going through with his ill-advised plans of an Arctic balloon expedition because he had promised so much to investors (and his nation as a whole), at some point, backing down simply was not an option.

    29. Re:Ok, here's my comment by elrous0 · · Score: 2, Insightful
      This reminds me of that "Well, they're not really hurting anyone--just giving them a little false hope. What's wrong with that?" argument that "psychics" use to justify bilking old ladies out of their money by letting them talk with their dearly departed relatives.

      False hope, lies, and scientific hogwash ARE dangerous. It's the same crap that gave us Eugenics, and had the CIA wasting millions of $ on psychics, and has Bible-thumpers running around claiming that the earth is only a few thousand years old.

      In other words, bullshit doesn't just smell--it can also waste money, lead people to irrational behavior, and divert resources best focused elsewhere.

      --
      SJW: Someone who has run out of real oppression, and has to fake it.
    30. Re:Ok, here's my comment by falconwolf · · Score: 1

      That statement does not in any way indicate how dense the material is, only how strong it is compared to another material.

      Oh, but it does: "pound for pound". That means one pound of this is ten times as strong as a pound of steel. While steels do vary in strength, there is no steel nearly so strong as you would need for the density to be 0.097 g/cm^3.

      Unless you want to take weight as density, which it isn't, it does not indicate how dense the material is.

      Falcon
    31. Re:Ok, here's my comment by Anonymous Coward · · Score: 0

      What DID this guy DO to you and all the other moaning slashdotters?

      He is making outlandish, unfounded claims. He is committing an affront to geekdom.

      Nerds and geeks live in a meritocracy. If you boast that you can do what a thousand
      truly brilliant and respectable people cannot do, and then not only do you fail
      to do anything even the slightest bit impressive AND continue to claim that you
      are brilliant, then you deserve to be ridiculed by nerds and geeks, and you will be.

    32. Re:Ok, here's my comment by Rei · · Score: 1

      I'm only taking weight for mass, so unless you think they're measuring on another planet...

      Stop for a second. The densities of steel are known. The tensile strengths of steel are known. The tensile strength of this is known. There's only one unknown. The problem is:

      10 * SteelStrength / SteelDensity = SpectraStrength / X

      Solve for X (SpectraDensity).

      Example: Going with a 2.5GPa steel, you're looking at something like:

      10 * 2.5 / 8.0 = 3.5 / X
      Spectra density = 1.16 g/cm^3

      Going with a 3GPa stel, you're looking at:
      10 * 3 / 8 = 3.5 / x
      Spectra density = 0.93 g/cm^3

      Notice how we're not even close to 0.097 g/cm^3.

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
  4. Re:It was doomed to failure by AoT · · Score: 1

    Space elevators are only possible with engineered carbon nanotubes which have only recently been envisioned by scientists.

    And by envisioned you mean created, because they have been. Certainly not up to spec for a space elevator yet, but they are out there already.

  5. But what next? by pchan- · · Score: 5, Funny

    I'm working on a space escalator. Sure, it's not as fast getting up there, but you don't have to wait for the car to come back down from orbit when you press the up button. To get down quickly, there's also a space firehouse pole.

    In all seriousness, though, I wish the LiftPort guys luck. I'm not sure how feasible it is, but I'd rather have people investing in creative, sometimes radical technologies than just sitting back and saying "no, that'll never work".

    1. Re:But what next? by deetsay · · Score: 2, Funny

      I'm working on a space escalator. Sure, it's not as fast getting up there, but you don't have to wait for the car to come back down from orbit when you press the up button. To get down quickly, there's also a space firehouse pole.
      There's a lady who's sure all that glitters is gold, and she's buying a stairway to heaven.
      --
      "The looser the waistband, the deeper the quicksand", or so I have read.
    2. Re:But what next? by JohnFluxx · · Score: 1

      In order to stay up, at the top the centrifugal force must be larger than the gravitational force (in the rotating frame).

      Thus if you had a fireman's pole and got on it near the top, you'd fly upwards, not downward.

    3. Re:But what next? by Grishnakh · · Score: 1

      In all seriousness, though, I wish the LiftPort guys luck. I'm not sure how feasible it is, but I'd rather have people investing in creative, sometimes radical technologies than just sitting back and saying "no, that'll never work".

      I agree, and unlike most Slashdotters (who are in IT), I'm a real engineer, one of those people Mr. Laine says is too concerned about triple redundancy and safety factors to do something risky and radical like this. Without the occasional risky project attempt like this, our pace of technological advancement would be much slower. Triple redundancy and large safety factors are for when a technology is extremely mature (like commercial aviation or office buildings), not when it's just getting off the ground so to speak.

    4. Re:But what next? by dhalgren99 · · Score: 0

      Call me when the space stripper pole is up and running...

    5. Re:But what next? by pchan- · · Score: 2, Insightful

      I'm not quite sure what the point would be to take the elevator all the way to the centrifugal counterweight at the far end of the cable. I will be taking the lift to the tension's midpoint, where I'd be weightless and it would require almost no energy to place things in orbit. But to each his own, I guess.

    6. Re:But what next? by JohnFluxx · · Score: 1

      To launch interplanetary crafts.

      Also I don't think the midpoint is a particularly interesting point.

  6. Re:It was doomed to failure by jeff4747 · · Score: 1

    Why would nanotubes be only used in space R&D?

    There's lots and lots of places on Earth where nanotubes would be very helpful. A whole bunch of them pay for their own R&D without any federal funding.

    There's also more than 1 scientifically advanced country, and they're not on the decline when it comes to basic research.

  7. Re:It was doomed to failure by butlerdi · · Score: 1

    You speak of Federal funding. This US centric view is quite funny. Why is it not possible that one of the newer emerging economies would start to fund such ventures. China is spending more on space these days, as is the EU or even a cartel of corporates. Granted the state of the art in nanotech is still a bit lacking, but recent successes are rather inspiring.

    --
    "If the King's English was good enough for Jesus, it's good enough for me!" -- "Ma" Ferguson, Governor of Texas (circa
  8. Objection: Asked and Answered by QuantumG · · Score: 2, Interesting

    If it weren't for the costs, we could build one this year. Materials exist today that are strong enough and light enough to support the weight of the lifter and itself. The problem is the number of rocket launches it would take to get the construction started. You could build it out of Spectra but you would need hundreds of heavy lift rockets just to get started. The cost of launch for those rockets would make the project not financially viable. In fact, you could make the elevator out of other materials that each have their own set of difficulties. So, in short, your premise is incorrect. Certainly, the design would be different, and there would be other challenges that are not managed in the current design, but lets be perfectly clear - there is a big difference between ''difficult'' and ''impossible''. An elevator to space is only difficult. Right now, we still don't know enough, which is why we have spent so much on research. I don't AGREE with this claim.. I've seen no study which shows this to be the case, and all the other problems other than the material to use are not solved.. but he has already addressed the objection that you NEED carbon nanotubes.

    --
    How we know is more important than what we know.
    1. Re:Objection: Asked and Answered by Jack9 · · Score: 2, Interesting

      There's no reason to disagree with his claim. Heck, I could build a space elevator today with enough money. There is no claim that it would function or be useable or even deployable. I agree a worthless space elevator could be build for obscene amounts of money. I'm afraid this is more than a pipe dream, but a grand delusion. Put the money and R&D into personal jetpacks for God's sake.

      --

      Often wrong but never in doubt.
      I am Jack9.
      Everyone knows me.
    2. Re:Objection: Asked and Answered by suv4x4 · · Score: 1

      There's no reason to disagree with his claim. Heck, I could build a space elevator today with enough money.

      So how much you need? $100, $200?

      Put the money and R&D into personal jetpacks for God's sake.

      Actually the alternative is creating huge rocket's with huge amounts of fuel in them, and throwing the rockets away in space (or ocean) every time you go up.

      You consider if it's "for God's sake" or just the next very practical step in space trips. A space elevator would allow an entire new class of lightweight space ships which can't operate in Earth atmosphere. They'll be build and tested here, then elevated up and launch directly from space.

    3. Re:Objection: Asked and Answered by bodan · · Score: 2, Informative

      I don't AGREE with this claim.. I've seen no study which shows this to be the case, and all the other problems other than the material to use are not solved.. but he has already addressed the objection that you NEED carbon nanotubes.
      That's because you didn't read enough. Most contemporary studies only deal with economically-feasible designs, which is why they only mention very-high-strength materials. This is because using lower-strength materials requires hugely more material, which is simply very hard to send up to orbit.

      I have seen calculations for a steel elevator. Yes, it's physically possible with a very tappered design, but it would have a diameter of several hundred kilometers at the thickest part. (Given that its several hundred thousand kilometers long, that's rather thin if you think about it.) However it would need the entire Earth's steel production for a few thousand years, probably, and even longer for rocket fuel to get things started.

      However, steel isn't a very good choice because of weight (and it's not that strong, either). The optimal diameter at the thickest point is an exponential of density/tensile strength (with a pretty big constant). This means that even small (relatively) advances in that component will greatly decrease the cost, and we have materials much, much better than steel in that respect.

      It's perfectly doable technically, without any major breakthroughs, it's just because of economics that you've never heard of that. With the best technology we have now it is still probably doable within a reasonable multiple of the world's GDP.

      We need breakthroughs not to build it, but to build it with less than a country's GDP.

      --
      "I think I am a fallen star. I should wish on myself."
    4. Re:Objection: Asked and Answered by QuantumG · · Score: 1

      Ummm.. he said it could be done today with suffient funds. 1000 years of global steel production isn't today.

      --
      How we know is more important than what we know.
    5. Re:Objection: Asked and Answered by bodan · · Score: 1
      Maybe you missed this part:

      However, steel isn't a very good choice because of weight [...] With the best technology we have now it is still probably doable within a reasonable multiple of the world's GDP.
      Steel is an extreme example of what we could do with low-tech. I haven't made the calculations, so I don't know how much steel (and energy for smelting it) this would need, my estimate might be off by a couple orders of magnitude. But it doesn't matter, because using steel is not the point.

      The point is that we have materials good enough to build one today, if every nation on Earth would try very hard. (Actually, the US defense budget is probably enough.) I doubt we can build it in a year, I think that was a slight exaggeration. Maybe he meant he could start building it this year, or he has very different estimates than mine. (I'm guessing a lot here, and he's been actually researching.) But a decade is probably doable with current world resources and current technology.

      --
      "I think I am a fallen star. I should wish on myself."
    6. Re:Objection: Asked and Answered by Firethorn · · Score: 1

      And he mentioned a material other than steel for it's production. Steel is used for a lot of stuff today because it's cheap, well known, traditional, and 'good enough'.

      --
      I don't read AC A human right
    7. Re:Objection: Asked and Answered by Cedric+Tsui · · Score: 1

      Heck, I could build a space elevator today with enough money. ??? I'm confused.

      In order for any object to span the length the space elevator would need to, it needs to have a density similar to that of graphite and a tensile strength no less than 65 GPa. And that's just to support itself. This is with the optimized shape.

      Now the strongest thing we can make at length is carbon fibre at 5.6GPa, Kevlar at ~4GPa. For comparison, steel has a tensile strength of ~2GPa.

      So far as I can tell. An infinite amount of money won't change this. That is, unless the money will be spent on advanced material research.
    8. Re:Objection: Asked and Answered by maxwell+demon · · Score: 1

      Heck, I could build a space elevator today with enough money. ??? I'm confused.

      In order for any object to span the length the space elevator would need to, it needs to have a density similar to that of graphite and a tensile strength no less than 65 GPa. And that's just to support itself. This is with the optimized shape.

      Now the strongest thing we can make at length is carbon fibre at 5.6GPa, Kevlar at ~4GPa. For comparison, steel has a tensile strength of ~2GPa.

      So far as I can tell. An infinite amount of money won't change this. That is, unless the money will be spent on advanced material research. He didn't say he would build that space elevator starting from earth. There are lots of celestal bodies which have far less gravity than earth, and it shouldn't be too hard to find one where the strength of current materials would suffice for a space elevator. With enough money, it should be possible to build one there.
      --
      The Tao of math: The numbers you can count are not the real numbers.
    9. Re:Objection: Asked and Answered by tgrigsby · · Score: 1

      Sources, please?

      (Slashdot editors: And for the record, if I only need 2 seconds to create a message of two words, why do I have to wait 30 seconds before I post it?)

      --
      *** *** You're just jealous 'cause the voices talk to me... ***
    10. Re:Objection: Asked and Answered by tgrigsby · · Score: 1

      In order for any object to span the length the space elevator would need to, it needs to have a density similar to that of graphite and a tensile strength no less than 65 GPa. And that's just to support itself. This is with the optimized shape.


      The 62.5GPa (not 65 GPa) is for a constant width cable. With a tapered cable it's far less.

      --
      *** *** You're just jealous 'cause the voices talk to me... ***
    11. Re:Objection: Asked and Answered by Jack9 · · Score: 1
      I'm sorry, perhaps you didnt read the rebuttal.

      If it weren't for the costs, we could build one this year.
      I'm claiming no less. Nothing about it being useful or working for any length of time, but I could certainly build one. In fact I did, with a very expensive string and a cup.
      --

      Often wrong but never in doubt.
      I am Jack9.
      Everyone knows me.
    12. Re:Objection: Asked and Answered by Cedric+Tsui · · Score: 1

      Are you sure? From what I've read, a cable of constant width would require a tensile strength of 382GPa.

      Here's my source
      It's a paper in the american journal of physics by the americal association of physics teachers with a simplified version of the thought experiment and the math leading to the current concept of the space elevator. I don't believe you need a subscription to access this pdf. But let me know if I'm wrong and I'll get around it somehow.

    13. Re:Objection: Asked and Answered by Cedric+Tsui · · Score: 1

      You're right. I didn't read it.
      I skimmed it and got confused and decided I didn't want to get into why people were upset with this particular company.
      But then someone posted that it was possible to build a space elevator. That's not true. With an unlimited amount of money, and the entire population of the earth working with the sole purpose of creating a space elevator, it is not currently physically possible.

      The claim is to be able to build a space elevator. Which (unless you want to redefine the term) a device used to transport material from some celestial body into space. The only way this will work is with a cable extending slightly beyond geosynchronous orbit.

      Now. Yes, you can say that with a very large amount of money and today's technology, you could build a space elevator on the moon to lift things from the moon into orbit around the moon. But we can not make one for earth. With an optimized cross sectional area to altitude function, the minimum tensile strength required is beyond that of anything we have measured. So far as I've read, including carbon nanotubes. (yes, they can theoretically be strong enough, but the highest tensile strength measured was 52GPa[wikipedia])

  9. kdawson = more variety and easy listening hits! by weighn · · Score: 0, Offtopic

    coondoggie writes to tell us, Van Cutter Romney sends us word and TropicalCoder is the reader who submitted the story ... kdawson, you are indeed a breath of fresh air!

    --
    Mongrel News all the news that fits and froths
    1. Re:kdawson = more variety and easy listening hits! by yellowalienbaby · · Score: 1

      when you see 'confirm email*' on a form, do you feel compelled to go Shift+Tab / Ctrl+C / Tab / Ctrl+V? yes. i do it a lot. and wondered, often, if others did it too. thanks :)

      --
      Darwin Hawking Blackmore
  10. Why? by FredDC · · Score: 1, Funny

    I'm not even gonna question whether it is possible/feasible/... I only want to know "Why?".

    Why would you want to build an elevator into space? What do you put on the end of the elevator? An amusement park? With hookers and blackjack?

    Just because it can be done, doesn't mean you have to do it... There are alot more important and much more useful projects money could be put into IMHO!

    --
    09 f9 11 02 9d 74 e3 5b d8 41 56 c5 63
    1. Re:Why? by Anrego · · Score: 1

      So we can live in constant fear of the top breaking and the whole thing wrapping around the earth several times!

    2. Re:Why? by PeterBrett · · Score: 1

      Why would you want to build an elevator into space? What do you put on the end of the elevator? An amusement park? With hookers and blackjack?

      If you like. It might be a more worthwhile use of time & money to put a spaceport there.

    3. Re:Why? by greg_barton · · Score: 1

      Did you read the rebuttal? Thin as a sheet of paper, 15 feet wide. It'd fall with the force of newsprint due to air friction.

    4. Re:Why? by creysoft · · Score: 4, Insightful

      Because even though we can GET to space, all the really interesting stuff you can do up there is infeasible due to the fact that the only way to get anything INTO space at the moment is to strap a rocket to it and pray. Provided it gets there at all, it still costs tens of thousands of dollars per pound to get something up there. And once it's up there, there's no way to get it back down except to drop it.

      The gigantic, orbiting space stations we envisioned as children won't be possible until we can get stuff to outer space cheaply and easily. Neither will manned missions to mars.

      With a space elevator, all you do is load it up onto a climber and send it up the cable. It'll get there in a few days. Not as fast as a rocket, sure, but a hell of a lot cheaper, easier, and safer.

      --
      Formerly GNU/Anonymous Coward. This message has been determined to cause cancer in laboratory animals.
    5. Re:Why? by QuantumG · · Score: 5, Insightful

      Look, I don't blame you. There has been little to no public discussion of why space is such an important place to go. Let me try to explain just a little here for you now. For starters, we have an increasing population on Earth. Traditionally, this hasn't been much of a problem because the majority of the population has been too poor to pose any real threat to using up all the resources on Earth. There's a finite amount of coal, oil, and precious metals on this planet, not to mention land you can use for growing food. As they say, they're not making any more of it. So, what to do?

      Well, there's some people who think we should force people to stop breeding. Put a limit on how many children you can have so that the birth rate is less than the death rate. Stop treating the sick and old. Stop giving aid to third world countries. Just let em all die so that the population of Earth gets down to a nice manageable level. These people rally under the banner of "Limits To Growth".

      Then there's the space advocates. Of which I am one. We believe that the best solution to there not being enough resources on Earth for everyone is to go get resources off Earth. There's thousands of Near Earth Asteroids which contain hundreds of times more metal than the entire crust of the Earth is believed to hold. There are only thousands of them because the Earth has this giant deflector that thankfully stops them from falling on us (although every 60 million years or so we get a big one that nearly wipes out all life on the planet, the last one was about 65 million years ago). This giant deflector is called The Moon and it has millions of craters on it, most of which were caused by these big metal asteroids.. the metal is still up there.

      Getting to the Near Earth Asteroids is considered easier than getting to the Moon, but the Moon obviously has a lot more resources on it and, hey, we've done it a dozen times already. The cost of expanding our civilization into space is great. I don't argue that. But the cost of not expanding our civilization into space may well be much much greater. We're eating up this planet, and we don't (yet) have another one.

      --
      How we know is more important than what we know.
    6. Re:Why? by Quiet_Desperation · · Score: 1

      What do you put on the end of the elevator? An amusement park? With hookers and blackjack?

      I am *so* there. What's a ticket cost?

    7. Re:Why? by fonik · · Score: 1

      The tickets are $15. Shipping and handling is about $10 billion and your estimated ship date is in 15 years.

    8. Re:Why? by fonik · · Score: 1

      Seriously though, on their estimates of $220/kg my ticket would be $15,400.

    9. Re:Why? by FredDC · · Score: 1

      Look, I don't blame you.

      Wow, and this on slashdot!

      For starters, we have an increasing population on Earth.

      Ok, and where will you send people? There is nothing out there where people can live... Space stations, off-world settlements, ... are distant future dreams at the moment. As much as I hate to say it (and I do hate it), humanity is just not up to the task yet!

      There's thousands of Near Earth Asteroids which contain hundreds of times more metal than the entire crust of the Earth is believed to hold

      You're going to build an elevator to bring stuff down? Seems like gravity does a pretty good job at it already according to me... A controlled descent of small enough packages seems alot cheaper/easier/faster/safer to me. We're already doing it all the time... And before we start building ways of getting it down, don't you think some time should be spent on thinking of a way of getting it off the asteroids/moon/... and bringing it to Earth first? I think this is the hard part, not how you bring it down...

      An elevator into space can indeed have advantages, but I just don't see any at the moment, not in the immediate or even somewhat further future.

      --
      09 f9 11 02 9d 74 e3 5b d8 41 56 c5 63
    10. Re:Why? by QuantumG · · Score: 1

      I can't believe I'm explaining this, but you need a launch capability much greater and cheaper than we have today to make a space economy work. Ya know, you gotta put mining equipment, and people and all the support infrastructure for people (or, if you can do it, lots of robots instead) onto the Moon. Doing that with Apollo era technology would be doable, if it weren't for the fact that the technology is classified.

      Personally, I think the solution to the problem of better and cheaper rockets is people who want to make better and cheaper rockets (instead of companies like Boeing and Lockheed Martin who just want nice fat profits). And thankfully that's happening now with the NewSpace community. But hey, if we can build a space elevator, that'd be great too.

      And yes, there are plenty of designs for solar powered furnaces to melt and process this material on the Moon. This isn't a topic I can cover in a Slashdot post. There's a whole lot of literature on the subject. I recommend Dennis Wingo's Moonrush as a starter.

      You asked how this actually helps us ship people off world. It doesn't. That's not the goal. We're not trying to warehouse the poor in space. I've only presented one of the suggested ways that space can reduce the resource limitations of our planet. Precious metals are more than just fancy jewlry these days, they're used in all sorts of industrial processes.. and they're an integral part of the hydrogen economy, which many people recognise as our best bet for removing the world's dependancy on fossil fuels - just so long as we can get the greens to stop beating up on nuclear fission.. and it will be critical when fusion becomes a reality.

      Then there's the space power satelite people. There's a heck of a lot of power out there and we could use it down here.

      Then there's the people who want to teraform Mars and build giant domes over craters on the Moon. That does give you some people moving off world.. but more importantly, from Earth's perspective, is that it gives us experience doing planet sized engineering. Which, unfortunately, is exactly what we need to be doing with our own planet.

      --
      How we know is more important than what we know.
    11. Re:Why? by CaptainAvatar · · Score: 1

      In fact, forget the blackjack.

      --
      The real Captain Avatar is a fictional character, so I suppose he doesn't mind if I impersonate him.
    12. Re:Why? by suv4x4 · · Score: 1

      Well, there's some people who think we should force people to stop breeding. Put a limit on how many children you can have so that the birth rate is less than the death rate. Stop treating the sick and old. Stop giving aid to third world countries. Just let em all die so that the population of Earth gets down to a nice manageable level.

      You can't forbid people to have kids, but there's a much simpler way to ensure they never have any (no, not neuter them).

      You see, population grows, and all of that growth is coming from poor countries, and poor ghettos in richer countries. Truth is, in a modern society, the more educated you are, the better off you are, the more better off you want your kids to be, have access to birth control measures, and eventually have less kids, sometimes even have no kids.

      At the end of the spectrum you're thinking about everything so much, you may never get a girlfriend in the first place.

      So what do we need to do: get the world educated, and thinking a lot. The more they think about everything, the lower the birthrate.

      It's a fact of life that when you're not busy thinking, you usually fill the time making lots of kids.

      So there's my conclusion to this one problem

    13. Re:Why? by Doc+Daneeka · · Score: 1

      Hopefully, the fuel we use in the rockets will be neutral in terms of entropy change in the environment. So, that means either greater energy density batteries and solar panels that push closer and closer to the theoretical 50% efficiency, or using ethanol and/or butanol for fuel. If not, we, as a species, would have a three-pronged mission in space: first, obtain raw material to develop new technologies to go further and quicker into space; second, find new sources of fuel; and finally, either solve the ever increasing entropy problem or move the population somewhere else.

      Personally, I dislike the term "global warming" as that would suggest that the overall enthalpy of earth were increasing. We are releasing more energy into the system so the overall entropy is increasing due to so many solid and liquids being converted into gas. I am not a scientist but that's just my two cents.

    14. Re:Why? by QuantumG · · Score: 1

      Oh, I don't disagree, but how exactly how you going to make everyone on Earth rich enough to become educated enough to reduce population growth?

      And how are you going to solve the issue of all these now rich and educated people wanting access to materials that are in limited supply?

      That's what expansion into space buys you.

      --
      How we know is more important than what we know.
    15. Re:Why? by suv4x4 · · Score: 2, Funny

      Oh, I don't disagree, but how exactly how you going to make everyone on Earth rich enough to become educated enough to reduce population growth?

      Hmmm... Ah, damn it, let's neuter them!

    16. Re:Why? by Rupert · · Score: 1

      You'd need to put about 250,000 people per day into space just to keep Earth's population stable. What sort of habitat and what sort of society have you got up there that can accept an influx of 90 million people per year?

      Not that I don't think it's important, but the scale of the population problem is such that it's not going to be solved by emigration even if we had a working space elevator now. And, of course, it gets exponentially worse every day until we solve it.

      Disclaimer: I have two children and have been surgically prevented from having more.

      --

      --
      E_NOSIG
    17. Re:Why? by QuantumG · · Score: 1

      Actually read my post! I'm not advocating shipping the poor into space.

      --
      How we know is more important than what we know.
    18. Re:Why? by edwardpickman · · Score: 1

      Hookers in space! Best reason I've heard yet for space travel.

    19. Re:Why? by FredDC · · Score: 1

      Oh, I don't disagree, but how exactly how you going to make everyone on Earth rich enough to become educated enough to reduce population growth?

      And how are you going to solve the issue of all these now rich and educated people wanting access to materials that are in limited supply?

      That's what expansion into space buys you.


      Look, the solution to overpopulation, poverty and environmental problems isn't going to come from falling from space! (Well, perhaps a large enough meteor could fix it, but that's a final resort thingy) And neither will it be fixed by launching things/people into space, the stuff/people you move will just be replaced. We, humanity, are going to have to learn to exercise some constraint. Otherwise we can invent, mine, colonize, ... whatever we want, the problems aren't going to go away!

      Don't get me wrong, I'm all for these kind of scientific projects as they can be extremely positive in helping us cope with the issues that lie ahead of us. But at this moment, an elevator into space isn't gonna help us one bit, on the contrary! It'll just be an incentive to keep our consume-all mentality going. And with the way governments all around the world currently work, do you really think any of the new materials will reach the poor?

      No, I firmly believe that we should get our act together first before venturing forth into space, and that we should not blindly believe it's gonna fix all or any of our problems!
      --
      09 f9 11 02 9d 74 e3 5b d8 41 56 c5 63
    20. Re:Why? by Eivind · · Score: 1

      Yeah. Hookers in zero-g would be quite popular I think. For those *with* a SO, a love-hotel would certainly also be. Seriously though, people demonstrably pay $20 million to visit cramped space-stations today. It's not much of a stretch to assume that the number of people willing to pay would increase if the price fell.

    21. Re:Why? by Eivind · · Score: 1

      We certainly aren't, as you say, yet.

      Dropping launch-costs from $50.000/lbs to $500/lbs would however be a very significant step towards *making* us more capable of doing all that stuff. Particularily since one of the first cargoes hoisted on the first space-elevator would probably be: "Space-elevator 2"

      If a person requires 100.000kgs of space-station to live in, that's $50million in lifting-costs at Liftports target price. Which makes it impractical for most of us. (but take note: there are individuals paying $20million for a short week-long *visit* to space today!

      Visiting would be popular first, long before we ever got real settlers. A week-long visit as a tourist to a space-hotel migth require lifting 250kg of cargo, which would be $125.000 at Liftports target-price. That is expensive, but there are thousands of people who would be able and willing to pay it, just as there are dozens of people who are today trying to get into space at a price-point 2 orders of magnitude higher.

    22. Re:Why? by Anonymous Coward · · Score: 0

      >"For those *with* a SO, a love-hotel would certainly also be"

      If the Slashdot crowd is the market for THAT, the market would be very small.

    23. Re:Why? by Old+Wolf · · Score: 1

      "Need money for 36000 mile high pot and hookers... hey at least we're not bullshitting you"

    24. Re:Why? by KeensMustard · · Score: 1

      There's a finite amount of coal, oil, and precious metals on this planet, not to mention land you can use for growing food. As they say, they're not making any more of it. So, what to do? Well, for starters, I wouldn't be looking to space to solve that problem because none of the things we are running out of can be found in space
      • There's no coal in space. Even if there were, we shouldn't be going there to get it - the better plan by far is to stop burning it.
      • There's no oil in space. Even if there were, we shouldn't be going there to get it - the better plan by far is to stop burning it.
      • There might be precious metals in space, but the thing with metal is, there are few if any processes that actually consume metal. Currently we dig metal out of the ground because it's cheaper to buy from miners than to recycle. But of course, recycling is cheaper again by several hundred orders of magnitude than having robots mine it from the moon or a nearby asteroid, making such plans look pretty laughable
      • There's no arable land in space.
      Our only real constraints for resources in terms of a growing population are energy and soil nutrient. There are far cheaper and more practical means of solving the first one than space based solutions (eg orbital solar platforms w/ microwave links), and space travel is of no use at all in solving the latter.

    25. Re:Why? by Hal_Porter · · Score: 1

      Won't the population level off at some point?

      http://en.wikipedia.org/wiki/Human_population

      Don't get me wrong I like the idea of colonising the solar system because it stops us being wiped out by an asteroid or (more likely) a major war. But I'm suspicious of people using Malthusian arguments to push their pet project. And it seems like the technology for colonising the solar system just isn't really there yet.

      --
      echo -e 'global _start\n _start:\n mov eax, 2\n int 80h\n jmp _start' > a.asm; nasm a.asm -f elf; ld a.o -o a;
    26. Re:Why? by naoursla · · Score: 1

      correction:
      With a space elevator, all you do is load it up onto a climber and send it up the cable. It'll get there in a few months.

      It is 22,000 miles to geosynchronous orbit,

      http://en.wikipedia.org/wiki/Geosynchronous_orbit

      Dropping things is still the fastest way down. According to LiftPort plans, there will be several loads travelling up the elevator at one time. Once a vehicle arrives at the top it stays there and never comes down. It is simply additional ballast at the end of the tether.

    27. Re:Why? by everphilski · · Score: 1

      There is plenty of free space and on the moon there is plenty of this stuff called Silicon Dioxide - which can be made into computer chips, yes, but more importantly solar panels. Energy is essentially free in space if you bring the solar panels with.

      Arable land isn't as big a deal as you make it out to be. With careful conservation a sustainable society is possible. Again, the real thing stopping us is a lack of cheap transportation. At shuttle (even Soyuz) costs, you just can't justify anything more than governmental experimentation.

      But of course, recycling is cheaper again by several hundred orders of magnitude than having robots mine it from the moon or a nearby asteroid, making such plans look pretty laughable

      Recycling used metals is no laughing matter. Fast Company had an article about it a year ago. There is more gold per ton in a dump of old computers than there is in the worlds richest gold mine - but we can't get to it with any level of efficiency. Other rare metals too. Believe it or not mining asteroids may not be that expensive, depending on how you do it. Leveraging orbital mechanics, the delta-V isn't unobtainable. Right now? yes, very cost prohibitive. But again, once the barrier of entry to LEO is lowered there are a lot of things we can do (and essentially 'free' energy propulsion methods usable outside the pull of Earth's gravity, just bring the solar sail / solar cells and ion drive [the asteroid will have the fuel], etc).

    28. Re:Why? by Anonymous Coward · · Score: 0

      HA! You won't convince anyone to go to space with petty reasons like population growth or fancy ideals. What you need is space gold! And you know what? It already exists.
      http://www.matter-antimatter.com/asteroid_3554_amu n.htm
      The first country to be successful in space will have untold wealth and resources waiting to be gained. Wealth which can be used to crush its enemies!

    29. Re:Why? by Weezul · · Score: 1

      Rocket's must spend fuel to carry more fuel. Space elevators can run entirely on electricity via solar or nuclear.

      It's all just a question about carbon nano-tubules technology, which will have many other applications. A good president would just order NASA to prioritize this technology for the next 25 years.

      --
      The Christian religion has been and still is the principal enemy of moral progress in the world. -- Bertrand Russell
    30. Re:Why? by EvilDroid · · Score: 0

      Of course, the spaceport will have hookers and blackjack. If you see Greedo there, be sure you shoot first.

    31. Re:Why? by Control+Group · · Score: 3, Interesting

      Postulate for a moment a limitless supply of raw materials, and a limitless space to put waste materials in. In that environment, what, exactly, is wrong with a "consume all" mentality?

      The space elevator - or rather, a technology which gives efficient, low-cost access to space - has the potential to make that scenario a reality. We've got near-earth asteroids, the moon, and the entire asteroid belt full of metals. We've got moons and an Oort Cloud full of CHON - carbon, hydrogen, oxygen, nitrogen: the building blocks of all our food. And we've got all of space to discard waste products into. The resources exist in this solar system to keep us in consumables for a long, long time if we can just get out hands on them.

      An important - not, of course, the only, or even the hardest, but an important - step towards this is a cheap, high-volume way of ferrying material out of and into Earth's gravity well.

      --

      Reality has a conservative bias: it conserves mass, energy, momentum...
    32. Re:Why? by Anonymous Coward · · Score: 0

      let's assume 100 miles an hour...certainly not unreasonable (probably on the very slow side).

      22,000 / 100 = 220hrs or less than ten days to geosync.

    33. Re:Why? by Ambitwistor · · Score: 1

      We believe that the best solution to there not being enough resources on Earth for everyone is to go get resources off Earth. What resources off Earth are there not enough of on Earth? Serious question. Do you really think that lack of metal is going to be a serious constraint on human civilization? What resources does space have that we desperately need, and are cheaper to get from space (even with a space elevator) than from Earth?

      What would you do with a billion tons of nickel?
    34. Re:Why? by exi1ed0ne · · Score: 1

      There are alot more important and much more useful projects money could be put into IMHO!

      I really, really despise this argument. It assumes that pile of money/resources are in some way "ours" and not the people who actually own it. You could also say the same thing about people who spend cash on an iPod, since that money would buy a lot of grain and rice for starving people. Yeah, that's right. The exact same reason PETA zealots don't throw red paint on leather clad bikers - personal sacrifice sucks.

      It doesn't harm me one bit if "investors" throw piles of cash at this company. Worst case is that its a scam, and we have a couple less foolish wealthy through natural redistribution. Best case is that they actually do it, and we begin the era of human habitation in space. More likely they are for real (IMHO) and even if they fail at producing a working space elevator they might still spin off some interesting research in materials, lifter tech., etc.

      --
      Pessimists.net - as if life wasn't depressing enough.
    35. Re:Why? by Anonymous Coward · · Score: 0

      Electric systems are not a Heat Engine type system and are thus not limited to 50%, this can be seen for instance in that current batteries for instance far exceed 50% efficiency, I believe in fact that they exceed 90%.

    36. Re:Why? by Anonymous Coward · · Score: 0

      There's thousands of Near Earth Asteroids which contain hundreds of times more metal than the entire crust of the Earth is believed to hold. There are only thousands of them because the Earth has this giant deflector that thankfully stops them from falling on us (although every 60 million years or so we get a big one that nearly wipes out all life on the planet, the last one was about 65 million years ago). This giant deflector is called The Moon and it has millions of craters on it, most of which were caused by these big metal asteroids.. the metal is still up there.

      You've got it backwards. The Earth is more massive than the Moon, and has a larger cross section. There are more objects that get 'deflected' into hitting the Earth instead of the Moon than vice-versa.

      And you know those big metal asteroids that hit the Earth? The metal is still down here. It gets mixed up with crustal material on impact... but the same happens on the Moon.

      The real advantage, if there is one, is that if the metal does not have the opportunity to combine with oxygen, sulfur, etc. on the Moon. In that case you could obtain elemental metals without having to smelt ore, which both requires energy and uses a redox reaction that turns carbon to CO2. If the cost of sending objects to and from the Moon were trivial, then it could be worthwhile.

      Now, I'm not geologist. But I do know the Moon's crust, like the Earth's, is mostly made of oxygen. And although the Moon does not have active plate tectonics, when an asteroid of appreciable size hits, it will surely liquefy a considerable amount of crust. So I would think your metals will get oxidized and you will not find deposits of pure metal. I could be totally wrong here, but I'd want some good evidence to convince me.

    37. Re:Why? by TheRaven64 · · Score: 1

      You'd need to put about 250,000 people per day into space just to keep Earth's population stable. What sort of habitat and what sort of society have you got up there that can accept an influx of 90 million people per year? I believe it's called 'The B Ark.'
      --
      I am TheRaven on Soylent News
    38. Re:Why? by VoidWraith · · Score: 1

      To add to the arguments against space colonization: Think about the exponential growth rate. If you want to maintain that exponential growth rate, by allowing people to have as many children as they want and keeping people alive as long as possible, the exponential rate is going to continue. That means you have a doubling period, with recent growth rates, something like 40 years. Let's fast forward to a point where we're out of space on earth completely. Everything is used up, and the only way to sustain more people is to move to a new planet. So they do. The new planet is colonized and everything is dandy. Except in 40 years, that planet is full up too, and the only solution is to find TWO more planets.

      The above explanation mostly taken from a video by a professor, whose name or affiliation I don't remember. The idea of the lecture was that one of humanity's biggest problems is not understanding the exponential growth rate.

    39. Re:Why? by dvice_null · · Score: 1

      > I'm not even gonna question whether it is possible/feasible/... I only want to know "Why?".

      If you would like to take 1 kg to the space, that would cost about 3000 dollars. With space elevator that would cost about 3 dollars. Because the price is so cheap, this would basicly allow us to build something what is called a "mother ship" and execute 1000 times more space programs and basicly speed up the space investigation and commercializing.

    40. Re:Why? by x-guru · · Score: 1

      The simple answer: Money. According to this article in last months Wired magazine, the Space Shuttle costs close to $1 Billion every time it flies. In theory, a space elevator could operate at a fracton of that cost.

      The more detailed answer: Trying to beat Earth's gravity with rocket propelled aircraft is wholly inefficient compared to a space-elevator alternative. Picture an elevator in an 80-story skyscraper. Now replace the simple cable-motor pulley system with rocket propulsion, and replace the guide-rails with fins and an onboard stabilization system. Finally, from another perspective, replace the smooth, safe easy ride with an explosive, unstable high-G, high-risk one.

      This isn't meant to be an accurate point-for-point argument for the need for a space elevator, but more of an argument for the replacement of the status-quo. Challenger and Columbia have shown us that our current methods for breaking Earth's atmosphere are not safe.

      Before anyone brings up Burt Rutan and the X-prize, please remember that they acheived around 13 Miles altitude (SpaceshipOne's max is 70 Miles) vs. the International Space Station's 199 Miles


      --x

    41. Re:Why? by WhiplashII · · Score: 1

      There is a problem with this thought process.

      Most people's desire for reproduction does seem to decline with affluence - but not all. Religious people, in particular, are one such group. So let's say that one in a hundred affluent people still reproduce at normal rates - fast forward 100 years and everyone that was not reproducing is cleansed from the gene pool, and all that are left are the rapidly reproducing people.

      Affluence is a recent, large change in our environment. The low birth rate is evolution in action - people are self-selecting themselves out of the gene pool. The only thing that is certain is that the people around in 200 years will be the ones that either geneticaly are sociologicaly favor high birth rates.

      --
      while (sig==sig) sig=!sig;
    42. Re:Why? by FredDC · · Score: 1

      The point where your argument fails is in shipping unwanted material off the Earth and into space. How are you going to do this for gasses? Solid and liquid materials have never really been a problem to get rid off, you bury them deep enough and throw some concrete over it and you're done... That's how we've been taking care of most of our nuclear waste for a long time. The problem lies with gasses, it's not that easy to get rid of them.

      I suppose we could move factories that pollute into space, but yet again I say that this will not happen overnight...

      But yet again I have to point out that colonizing space isn't gonna happen anytime soon, it's a very slow process and I just don't see how this elevator will help. It's not going to be cheaper to put stuff into space, on the contrary, they'll have so much debt to pay off that they'll have to charge insane prices! Just look into what is going on with the tunnel between France and Britain, the company that controls the tunnel has never made a profit and isn't going to anytime soon. In fact, ever since the tunnel opened I've heared nothing but talk of possible bankruptcy.

      --
      09 f9 11 02 9d 74 e3 5b d8 41 56 c5 63
    43. Re:Why? by Doc+Daneeka · · Score: 1

      Batteries are not limited to 50% efficiency, circuits are once you put a capacitor in it. Wbattery = Ucapacitor + Heat => QV = 1/2*QV + 1/2*QV
      Electric circuit with a battery and a capacitor:
      E, efficiency = Wuseful / Wtotal
      = 1/2*Q*V / Q*V
      = 1/2 = 50%

      Gas powered engine without ways to use lost heat - this is assuming about room temperature intake
      E, efficiency = 1 - QL / QH
      = 1 - 300 K / 400 K
      = 1 - 3/4 = 25%

    44. Re:Why? by Grishnakh · · Score: 1

      Um, copper for one. It's needed for plumbing and electricity, and India, China, and every other developing country is consuming it at a fantastic rate as their standards of living improve (i.e., they get indoor plumbing like the rest of us). Consequently, our prices for it are going up astronomically.

      Metals like titanium would also be very helpful for many things, such as making vehicles more fuel-efficient, but it's currently too expensive to be used much.

      Platinum would be very helpful because it's an even better conductor than copper, but it's too expensive to use that way. With a huge supply, tons of new applications would be found for it, creating new technologies and markets.

      And of course, there's energy, which we never have enough of, and our current sources are highly polluting. Past our atmosphere, there's more solar energy than we can possibly use, and all it takes is some big solar panels to collect it, and beam it to earth by microwave.

      These "why go to space" arguments are just like the "why go to the New World", or "why bother finding a westward route to India" arguments hundreds of years ago.

    45. Re:Why? by falconwolf · · Score: 1

      Why would you want to build an elevator into space?

      The idea is because a space elevator would make it cheaper to transport people and stuff to space than using rockets. Now, why would anyone want a computer at home? Or in their office?

      Just because it can be done, doesn't mean you have to do it... There are alot more important and much more useful projects money could be put into IMHO!

      The problem I see with this is who decides what's more important and what more useful? Just because something isn't important to you or you don't see the usefulness it it doesn't mean it isn't important to those who do see the usefulness of it.

      Falcon
    46. Re:Why? by falconwolf · · Score: 1

      just so long as we can get the greens to stop beating up on nuclear fission..

      Nuclear fission isn't an answer, it's a problem. Even if you want to reprocess the waste. The French have done to most research on reprocessing and they don't have it figured out yet. Instead what they have is hotter waste as well as highly toxic chemicals leftover. The "IEEE Spectrum" had an article of this a few months ago.

      Falcon
    47. Re:Why? by Ambitwistor · · Score: 1

      You've missed half my argument, which is the part about getting it from space being cheaper than on Earth. Even assuming you have a space elevator to get into/out of LEO, mining asteroids is NOT CHEAP. (It's even less cheap once you factor in the cost of the space elevator, although that can be amortized over time and across projects.) Some metals are expensive, but I just don't see getting them from the asteroid belt being less expensive.

      Space-based energy is a much better justification for getting to LEO cheaply. Though I think there would end up being other objections to beaming energy from space.

      Anyway, I find much of the discussion moot; I don't think a space elevator is going to be technologically feasible within a timeframe useful for, say, replacing our energy dependence on fossil fuels. And seriously, I think replacing copper wires by carbon nanotubes is more likely to happen before anybody builds a practical space elevator out of them and then mines asteroids for copper with it.

      By the way, it's kind of dishonest to compare asteroid mining, which has not provably passed a cost-benefit analysis, with, say, historical trade with India, which did. Or rather, it's simply begging the question.

    48. Re:Why? by Eivind · · Score: 1

      Oh come of it. It wasn't funny 5 years ago and it certainly isn't now. The population on Slashdot is aproximately equally likely to be in a relationship as any other population of similarily-aged people. Even CmdrTaco himself got married for crying out loud.

  11. Re:It was doomed to failure by Puff+of+Logic · · Score: 5, Insightful

    You speak of Federal funding. This US centric view is quite funny. Why is it not possible that one of the newer emerging economies would start to fund such ventures. China is spending more on space these days, as is the EU or even a cartel of corporates. Granted the state of the art in nanotech is still a bit lacking, but recent successes are rather inspiring. The funny thing is that the one impetus that would absolutely, positively guarantee that the US would build a space elevator is if the EU, Russia, or China started work on one. Have no doubt: no-one on the planet will be permitted to build a space-elevator before the US or without US involvement; the federal/military complex in this nation wouldn't permit it.
    --
    P.P.S. I'm doing Science and I'm still alive.
  12. The 90s Called by Anonymous Coward · · Score: 0

    They want their horrible web page design back.

  13. Increased Pessimism by Anonymous Coward · · Score: 3, Interesting

    TropicalCoder asks, "After reading LiftPort's rebuttal to Slashdot critics, do any of you now feel your pessimism somewhat dispelled?"

    Not at all. If anything my pessism has increased when I read the spin, handwaving, misdirection, and evasions in Mr Laine's 'rebuttal'.

    For example, this little gem:

    Q: Business model is predicated on a technology that not only does not exist but you are incapable of inventing.
    A: That's true for the president of Boeing too. There's no way he could engineer the likes of the 777 with just the top level executives. He hires the right people to design, test and build these wonders of technology. Rather than waste our investors money on hiring full time engineers that could not succeed within the timeframe allowed by the dollars available, we subcontract. Outsourcing is not a new concept, and it saves companies quite a bit of money and time.

    Notice the answer completely unrelated to the question and the 'spin'.

    Or this one:

    Q: Perhaps should have been managed by a more highly qualified individual, such as a professional engineer with advanced engineering management degrees
    Because all engineers make good business administrators? Engineers are (and this is a generalization, I admit) generally too cautious. Innovators are risk takers. Entrepeneurs are risk takers. Engineers want triple redundancy and safety factors. To run a company for 4 years off a $200,000 investment takes talent. Granted, much more was invested by Mr. Laine himself, from his personal income, to keep this business running.

    More spin - and the fantastic claim that running a business for $200k for four years implies some kind of 'talent'. Heck, I could run a business for two *centuries* with that kind of investment. (It wouldn't produce a profit - but it would be 'run' and about as effective as LiftPort.)

    Q: You'll never see a fully functional space elevator on earth. The requirements are too close to the edge of what is even theoretically possible.
    If it weren't for the costs, we could build one this year.

    To put it bluntly - this is an outright lie. Period. if it were true - why is LiftPort spending money on R&D rather than production?

    Q: Even if the materials science isn't the problem, we have never made 36,000 miles of ANYTHING before.
    Roads? Railroads? The SMW3 fiber optic cable is 39,000km long. That's over a third of the 100,000km necessary to build the Elevator to Space (not 36,000 miles).

    The SMW3 fiber optic cable isn't a unitary and (for all practical purposes) flawless carbon nanotube fiber. Roads and railroads aren't unitary either. Micheal is either very disingenuous or very clueless.

    Q: You need a material approximately 3 times the strength of a (perfect) carbon nanotube in order to be a relatively safe civil/space engineering construction.
    That goes back to my statement earlier about engineers. No. You're not going to be able to have triple redundancy, and safety factors. You will have safety margins, and one of our first cargoes would be the second space elevator. We should be able to build that with half the strength of "perfect" SWNTs. We will employ standards of safety. We're sure the international legal community would see to that. About half the team grew up near the Tacoma Narrows Bridge. The failure of this bridge is a standard lesson in how NOT to engineer something for most engineering schools. We understand what is at stake.

    I too live near the Tacoma Narrows Bridge - and no, that is not how the bridge collapse is taught in engineering schools. Because in fact, the basic engineering of the bridge was quite sound - they failed however to take into account the effects of the winds. Numerous b

    1. Re:Increased Pessimism by Atragon · · Score: 2, Informative

      Q: You'll never see a fully functional space elevator on earth. The requirements are too close to the edge of what is even theoretically possible.
      If it weren't for the costs, we could build one this year.


      To put it bluntly - this is an outright lie. Period. if it were true - why is LiftPort spending money on R&D rather than production?

      Probably because the costs exceed their budget by several orders of magnitude and they are doing RND to reduce these costs and/or improve the end result.

    2. Re:Increased Pessimism by Anonymous Coward · · Score: 0

      I'm not sure /. is the place to evaluate the business acumen of this Laine fellow, but I can say one thing... 200k in investment capital doesn't buy you a fraction of a go-kart facility, much less a space elevator. Outsourcing or not, that kind of money could NEVER get the job done, unless the plan was to use the 200k for a fancier plan, and then get more investors.

    3. Re:Increased Pessimism by Rogerborg · · Score: 1
      You're having a laugh.

      If it weren't for the costs, we could build one this year. Materials exist today that are strong enough and light enough to support the weight of the lifter and itself.

      What materials are those then? They're available today, apparently, so no more R&D. Given an unlimited budget, but constrained by the available manufacturing capability, what do you build the beanstalk from? Fairy wings and yeti pubes?

      --
      If you were blocking sigs, you wouldn't have to read this.
    4. Re:Increased Pessimism by everphilski · · Score: 1

      Spectra. It was in TFA.

    5. Re:Increased Pessimism by everphilski · · Score: 2, Insightful

      I too live near the Tacoma Narrows Bridge - and no, that is not how the bridge collapse is taught in engineering schools.

      Uh, it was a lesson taught when I went to engineering school. The Tacoma Narrows engineers f*ed up and didn't take all of the variables into account.

    6. Re:Increased Pessimism by smellsofbikes · · Score: 1

      >Roads and railroads aren't unitary either.

      For the record, some railroads are. Watch track crews thermite-welding railroad tracks together some time. It's pretty impressive. The tracks 10 yards from my workplace are one continuous piece of metal for more than 2 km in either direction, coz that's as far as I've walked on them.

      --
      Nostalgia's not what it used to be.
    7. Re:Increased Pessimism by DerekLyons · · Score: 1

      I too live near the Tacoma Narrows Bridge - and no, that is not how the bridge collapse is taught in engineering schools.

      Uh, it was a lesson taught when I went to engineering school. The Tacoma Narrows engineers f*ed up and didn't take all of the variables into account.

      Thank you for pretty much repeating what I said. The bridge didn't fall because they had insufficient margins, as Mr Laine implies, it fell because they didn't account for the wind.
    8. Re:Increased Pessimism by everphilski · · Score: 1

      so... it's not taught in engineering schools, but it is taught in engineering schools?

      He talks about standards of safety before talking about the Tacoma Narrows bridge, which yes I think is applicable. I think you can even infer it was a margins issue, the margin of the resonant frequency to the driver.

    9. Re:Increased Pessimism by drinkypoo · · Score: 1

      The tracks 10 yards from my workplace are one continuous piece of metal for more than 2 km in either direction, coz that's as far as I've walked on them.

      I was told by my welding instructor (I am a shitty welder and dropped out of the arc welding class twice, but anyway) that the rail running closest to our town was a solid rail across like three states or something.

      Apparently they slap some kind of clay mold or something onto the rail and fill it up with thermite, for repairs. But when they are actually laying rail, they roll out a welding car that clamps onto the rail on both sides of the break, and just runs current through them, heating up the rail at the point of highest resistance (the break) and welding it together. I've done the same thing on a dramatically smaller scale to make a new saw blade for a band saw, often they have the blade-cutting-and-welding equipment right on them and this one did.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    10. Re:Increased Pessimism by smellsofbikes · · Score: 1

      I haven't gotten to watch resistance-welding of tracks, and didn't know they did it that way. I'd always assumed they just thermite-welded the new material.

      Your summary's correct. The mold is ceramic, it fits on the track fairly tightly along the web but not as much on the head or the butt of the track, and it burns hot and slow when they set it off. Then they put a long alignment/grinder setup on the track and run it back and forth and it grinds the surface down to the point where if I didn't know the join point, I couldn't tell it had been joined.

      It's not too hard to build your own spotwelder/resistance welder. It won't do bandsaw blades, or at least not well enough to trust them, but it'll do small, strong welds. I made mine out of an old arcwelder: ripped out the secondary and rewound it, machined a couple copper electrodes. It does a great job.

      --
      Nostalgia's not what it used to be.
    11. Re:Increased Pessimism by Anonymous Coward · · Score: 0

      Spectra. It was in TFA.

      Ah, there's your problem. In TFA.

      Remember, this is Slashdot. Nobody reads TFA!

    12. Re:Increased Pessimism by DerekLyons · · Score: 1

      so... it's not taught in engineering schools, but it is taught in engineering schools?

      Yes, the Narrows bridge is taught in engineering schools. No, it is not taught for the reasons Micheal alludes to.
       
       

      He talks about standards of safety before talking about the Tacoma Narrows bridge, which yes I think is applicable.

      Certainly safety standards are applicable. But the problem at the Narrows was not failure to conform to the accepted standards of the day. The failure lay in inadequetly accounting for the effects of the unique wind conditions at the Narrows - and arguably that failure was to some extent unavoidable as no theoretical or practical standards existed for the bridge to violate in the first place. (The history of bridges and their engineering is one of my hobbies.)
       
       

      I think you can even infer it was a margins issue, the margin of the resonant frequency to the driver.

      Only if you use some perfectly standard and well understood engineering terms - in completely nonstandard and unusual ways.
    13. Re:Increased Pessimism by DerekLyons · · Score: 1

      Roads and railroads aren't unitary either.

      For the record, some railroads are.

      For the record, no railroad is.
       
       

      Watch track crews thermite-welding railroad tracks together some time.

      Need I point out the difference between miles of track welded together and tens of thousands of miles of carbon fiber that must be manufactured as a complete unit? (I.E. not welded or fastened - but one complete unit utterly without fault or discontinuity.)
    14. Re:Increased Pessimism by DerekLyons · · Score: 1

      I was told by my welding instructor (I am a shitty welder and dropped out of the arc welding class twice, but anyway) that the rail running closest to our town was a solid rail across like three states or something.

      The only word to described that claim is - bullshit. Gaps are required for heat expansion, as well as for track safety and management systems to work.
       
      Additionally, an unbroken line that long would be economic insanity - you wouldn't be able to stop and drop or pickup cargo without bringing the whole line to a halt. Without switches and sidings you wouldn't be able to drop off a failed car, or run the line two-way. Etc... Etc... (Yes, I do study railroads.)
    15. Re:Increased Pessimism by Rogerborg · · Score: 1

      No, but seriously now, what would you use?

      --
      If you were blocking sigs, you wouldn't have to read this.
    16. Re:Increased Pessimism by smellsofbikes · · Score: 1

      As I said, I've walked a total of 4km on that particular railroad, and there isn't a gap anywhere. So, uh, whatever.

      Likewise, as I said in another bit of this thread, my understanding of the space elevator is that the fibers are not intended to be 36,000 miles long. They're intended to be meters long, and attached one-to-another by adhesives, just as current composite construction is performed.

      --
      Nostalgia's not what it used to be.
    17. Re:Increased Pessimism by DerekLyons · · Score: 1

      As I said, I've walked a total of 4km on that particular railroad, and there isn't a gap anywhere. So, uh, whatever.

      4 Km on an average railroad is a trivial distance. Having no gaps in a distance that short is all but meaningless.
       
       

      kewise, as I said in another bit of this thread, my understanding of the space elevator is that the fibers are not intended to be 36,000 miles long. They're intended to be meters long, and attached one-to-another by adhesives, just as current composite construction is performed.

      Well, no. Current composite construction embeds fibers in a matrix, which is not quite the same thing as attaching them to each other. (I.E., in current composite construction the fibers function more like rebar in concrete construction.)
       
      One plan for an elevator is to attach the carbon nanotubes (which are not quite the same thing as current carbon fibers) to one another (like the rails, but with an adhesive) - but there are two major problems; a) the same properties that make them superstrong make them very hard to attach to each other, and b) we don't actually know how to make them attach to each other very well. This is why most current plans rely on minimizing joints by maximizing fiber lengths - and hoping that in addition to developing fibers more than a few millimeters long (and being able to produce them in megaton lots), someone comes up with the appropriate adhesive (and production process for the ribbon/cable).
       
      Which is why some people are critical of elevator plans in general and LiftPort in specific. Proponents present the scheme as if it were merely a short step from current fibers and matrix to the required nanotubes and adhesives - but in reality there is a vast difference between the two.
    18. Re:Increased Pessimism by smellsofbikes · · Score: 1

      >> As I said, I've walked a total of 4km on that particular railroad, and there isn't a gap anywhere. So, uh, whatever.

      > 4 Km on an average railroad is a trivial distance. Having no gaps in a distance that short is all but meaningless.

      1. 4 Km is much, much longer than the tracks they're hauling out to the site when they're putting a railroad bed in. Which is to say: they are converting sectional track into continuous track.

      2. The TCOE of mild steel is 0.00000645in/in/deg F, or thereabouts, which means in a 4 km stretch, that sees a 40 degree temp swing, the track will lengthen by about 100 cm, if my math is right. That's one *hell* of a thermal expansion gap. Which is to say: clearly, in this environment, gaps are *not* required for thermal expansion. That's because the tracks aren't straight: they have lots of curves and the roadbed/tie plate mountings are sufficiently loose that the rail line can expand and contract like an accordion. If the tracks are dead straight, like the 1600 km straight shot across the Australian desert, then yes, they have lots and lots of thermal expansion gaps. But if the roadbed has even a slight amount of curve, they dispense with gaps, particularly because they're damaging to the rails, the wheels, and the wheel bearings.

      >> kewise, as I said in another bit of this thread, my understanding of the space elevator is that the fibers are not intended to
      >> be 36,000 miles long. They're intended to be meters long, and attached one-to-another by adhesives, just as current composite
      >> construction is performed.

      > Well, no. Current composite construction embeds fibers in a matrix, which is not quite the same thing as attaching them to each
      > other. (I.E., in current composite construction the fibers function more like rebar in concrete construction.)

      Current composite construction consists of taking fibers, and attaching them one-to-another by adhesives. The fibers are kevlar, S-glass, E-glass, or carbon fiber (which is selectively oxidized polyacrylonitrile, rather than nanotubes) and the adhesive is epoxy or vinylester, at least on the systems I've built. My description is factually accurate. They would *like* to weld -- by which I mean an attachment method that uses the base material as the adhesive -- their fibers together, but as far as I know they are not proposing doing that, they're proposing attachment precisely as I described it.

      > well. This is why most current plans rely on minimizing joints by maximizing fiber lengths - and hoping that in addition to
      > developing fibers more than a few millimeters long (and being able to produce them in megaton lots), someone comes up with the
      > appropriate adhesive (and production process for the ribbon/cable).

      I think what they're hoping for is to figure out a way to attack the ends of the nanotubes and attach some labile species to those, then somehow join them at their ends, which is going to take a miracle. In the meantime, they're probably going to try to get sufficently good fiber/adhesive bonding that, stretched over the length of the joint, it'll hold together, which is possible since the joint's tensile/shear strength per unit area will be many orders of magnitude less than the fiber's, but the area might be measured in tens of square meters, at which point it's possible they might get something that can keep the fibers together under the weight of the whole cable. I think it's very unlikely, but their system doesn't rely on 36Mm strands, just on strands that are sufficiently long that the adhered area between them exceeds the strand tensile strength. (Which implies a bunch of things about how it would have to be made -- lots of 2-dimensional pressure, vacuum degassing, anything to reduce the strand-strand distance.)

      --
      Nostalgia's not what it used to be.
    19. Re:Increased Pessimism by aybiss · · Score: 2, Interesting
      And you are a really nasty person with a complete lack of vision and no understanding of running a company.

      That's true for the president of Boeing too. There's no way he could engineer the likes of the 777 with just the top level executives. He hires the right people to design, test and build these wonders of technology. Rather than waste our investors money on hiring full time engineers that could not succeed within the timeframe allowed by the dollars available, we subcontract. Outsourcing is not a new concept, and it saves companies quite a bit of money and time.

      Notice the answer completely unrelated to the question and the 'spin'.

      That looked like a valid answer to me. Who is this mythical expert who could undertake possibly the most amazing engineering feat in the history of mankind by himself? Actually, are you sure you know what 'spin' means?

      Because all engineers make good business administrators? Engineers are (and this is a generalization, I admit) generally too cautious. Innovators are risk takers. Entrepeneurs are risk takers. Engineers want triple redundancy and safety factors. To run a company for 4 years off a $200,000 investment takes talent. Granted, much more was invested by Mr. Laine himself, from his personal income, to keep this business running.

      More spin - and the fantastic claim that running a business for $200k for four years implies some kind of 'talent'. Heck, I could run a business for two *centuries* with that kind of investment. (It wouldn't produce a profit - but it would be 'run' and about as effective as LiftPort.)

      You really are just an asshole. These people aren't producing a product for you to buy, they are researching something that has never been done before. And how much would you pay yourself per year running for 200 years with 200k? That's before tax, by the way.

      If it weren't for the costs, we could build one this year.

      To put it bluntly - this is an outright lie. Period. if it were true - why is LiftPort spending money on R&D rather than production?

      Because they have 200k and an intent to come up with a cheap(er) way of making the space tether, not infinity dollars and an intent to build a space tether today. Did you bother to read *any* of this in context?

      We're going to decline to comment on the personal attacks against our corporate officer, Michael Laine. His past business venture failed. Most entrepreneurs can also claim that dubious distinction on one or more occasions. It is better to have tried and failed than to have not tried at all.

      Funny how you fail to mention the fact of your past failures on your webite - in fact, you represent them as sucesses. I suspect much of what he represents as 'personal attacks' are nothing more than inconvient facts like these.

      I take it you've never failed at anything before? Did you qualify your post with a list of your past failures? No, and only a child would expect an R&D company to do the same. *Especially* an R&D company. Remember Edison and his light bulb? Should the box have listed all the failed methods he developed?

      The problem isn't that Micheal is a crackpot or a huckster - he sincerly believes what he is selling. The problem is that once he gets a Vision, facts need no longer apply - his Vision overrides all.

      And you, my friend, have neither facts nor vision but you chose to criticise someone who is working on both.

      Consider this: your personal attacks stop this man from even *trying* to build a space tether. In 30-40 years the human race is all but wiped out by global warming. Might the space tether have saved us all? We'll never know because of the moronic bitching of people who don't believe in anything they didn't invent or see in the window at Tandy.

      I'm guessing you're the sort of guy who scoffs at the possible advantages of dual-core computing

      --
      It's OK Bender, there's no such thing as 2.
  14. I don't think Liftport will work and here's why... by i_b_don · · Score: 2, Insightful

    It has nothing to do with the technical hurdles with are significant to begin with it has everything to do with the owner's Michael J. Laine's personality. First off, I'm a design engineer by profession and I've led up a fair number of projects, however going 100% off of my interpersonal skills I don't think Mr Laine will succeed.

    There are several things that a good entrepreneur needs in order to be successful on a project like this. The first of is he/she needs to be charismatic in person and in presenting the idea to other people. I mean, incredibly and unbelievably charismatic, so that only the most hard core doubters would walk away from a talk with him thinking "it can't be done". Frankly I didn't get that from Mr Laine. To me at least he came off as combative he didn't show me the "spark" that I would expect to see from a Steve Jobs or other figure who can really energize investors and employees.

    Failing that, then they will need some hard core technical skills to work with the team of engineers who will eventually make the technical leaps required to do something revolutionary. This I certainly don't get from Mr Laine. His attitude of "I'll contract out innovation" doesn't strike me as someone who will make a small miracle happen in his woefully underfunded project.

    And that's it. I don't even have to get into the technical issues in any depth and I'm already convinced that I should invest my money elsewhere. Sorry Mr. Laine, I bear no malice against you as a person, but you had your 5 min presentation and I came away unconvinced.

    d

    --
    all language nazi's will burne in heil!
  15. Painful Read by hardburn · · Score: 4, Insightful

    Reading the Slashdotters' comments was really painful. Do people around here lack vision and research skills?

    Carbon nanotubes are a miracle material. Not just for space elevators, but also for strengthening building/vehicle frames and nanotech. Any research on mass production of high-quality carbon nanotubes will have plenty of spill-over effect.

    Unrolling the initial fabric from orbit down to the surface without snagging is a challenge, but hardly an impossible one.

    Tesla was playing with remote power transmission a century ago. There's still work to be done, but all the major breakthroughs are in place.

    Speed to orbit? Why do you need to go fast? People used to take months to cross the Atlantic, and the treasures offered by cheep space travel are massive compared to the treasures of the New World. Or just send up cargo on the elevator and send people on a rocket (expensive and dangerous in comparison, but quick).

    In short, this wasn't Slashdot's finest moment.

    --
    Not a typewriter
    1. Re:Painful Read by Anonymous Coward · · Score: 0

      Speed to orbit? Why do you need to go fast?
      Probably has something to do with the energy requirements of fighting that pesky gravity. The longer you take to climb, the more energy you need. This is one of the many many fundamental problems with a "space elevator" no matter how you slice it.
    2. Re:Painful Read by Anonymous Coward · · Score: 0

      What are you, a retard? There's no energy requirement for a climber to remain still on the elevator -- it's exactly like climbing a rope. Even better, since gravity decreases the further you get from Earth, so the cargo weighs less and less, gaining you a decreasing energy requirement, not increasing. If you can manage the tensile strength requirements, a space elevator is practically a magic wand for getting cargo cheaply into space.
        It's just no good for people, though, because space is to radiation as the ocean is to salt, and shielding is heavy. Two or three days straight with little to no shielding and somebody's getting cancer.

    3. Re:Painful Read by Eivind · · Score: 1

      You need to go fast to make the entire thing cost-efficient. The entire point is providing cheaper access to space.

      The ribbon has a fixed capacity for carrying cargo, let's say it can carry 10e3 kgs of cargo.

      Distance to geosynch is 36000km, so if you where moving at 36km/h you'd need 1000 hours, or about 41.5 days. A naive calculation would mean this allows only 10 launches/year for a total of 10e4 kgs to orbit. Which is no longer cost-effective, it's about what a single saturn-V can lift. Furthermore, if the cargo is humans, it gets worse, because they'll need consumables (food, air etc) for that month, which further cuts back on useful cargo.

      Now, in reality it's better than that because gravity decreases as the cargo ascends, by the time the cargo has climbed one earth-radius, the force on the cable is only 1/4th of what it was when the cargo launched.

      Still, it doesn't change the basic fact that going twice as fast allows for launching twice as often, which makes it a lot easier to finance the thing.

      Their design calls for 200km/h, and a so on the order of a week to orbit.

      Climbing vertically alon a tape at 200km/h is nontrivial, especially at a full G, but it gets easier as the cargo gets higher, because gravity decreases.

    4. Re:Painful Read by splutty · · Score: 1

      Uhm... A climber for the space elevator doesn't actually carry its own energy source, which cuts down enormously on weight (this in contrast to a rocket, which is pretty much ONLY energy source, and very little effective cargo)

      --
      Coz eternity my friend, is a long *ing time.
    5. Re:Painful Read by drinkypoo · · Score: 1

      Tesla was playing with remote power transmission a century ago. There's still work to be done, but all the major breakthroughs are in place.

      We still don't understand how to do some of the things Tesla allegedly could do, which means he was either part scammer, or the information has been lost, either way in some ways we are substantially behind Tesla's legend.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    6. Re:Painful Read by XNormal · · Score: 1

      > Carbon nanotubes are a miracle material. Not just for space elevators,

      Exactly. They are also a miracle material for building airframes and pressure vessels for single-stage-to-orbit reusable launch vehicles.

      The financial calculations of space elevator proponents convniently assume that they get to use these miracle materials (which don't really exist yet outside of laboratories) while comparing them with the current state of competing launch technologies without the benefit of new developments. Sure, if you stack the deck this way and add a bunch of other optimistic assumptions you can make your favorite technology seem more cost effective.

      Sorry, I don't see a space elevator in our future. It will be overtaken by other players that don't need such a huge upfront investment in infrastructure before they ever deliver the first cargo.

      --
      Stop worrying about the risks of nuclear power and start worrying about the risks of not using nuclear power.
    7. Re:Painful Read by hardburn · · Score: 1

      The financial calculations of space elevator proponents convniently assume that they get to use these miracle materials (which don't really exist yet outside of laboratories) . . .

      Mass production methods have already been developed, although not necessarily at the quality necessary for space elevators. They are certainly becoming more than just an interesting lab experiment, though, and techniques can only improve with time.

      . . . while comparing them with the current state of competing launch technologies without the benefit of new developments.

      If a space elevator is feasible, then it should always beat a conventional rocket, since it doesn't have to lift its own fuel weight. Once it's built, it just needs the energy to move the lifter. And that energy can come cheep and with low environmental impact, since a space elevator makes microwave power satellites economically viable.

      --
      Not a typewriter
    8. Re:Painful Read by PhysSurfer · · Score: 1

      Unrolling the initial fabric from orbit down to the surface without snagging is a challenge, but hardly an impossible one.

      What research do you base this statement on? Currently, we can't even make the fabric, let alone "unroll" it. To have the necessary strength, you need essentially continuous carbon nanotubes extending from space to the ground. You can't use woven fibers because the nanotube-nanotube bonds aren't strong enough. At our current maximumCNT growth rates(0.1 mm/s), it would take millions of years to grow these continuous nanotubes. Perhaps it would be a good idea to take care of this small technological hurdle first before declaring it easy.

      Tesla was playing with remote power transmission a century ago. There's still work to be done, but all the major breakthroughs are in place.

      This is completely ridiculous. If that's true, why don't we already use wireless power? Powering light bulbs 10 m away is a far cry from tens of thousands of meters away. Tesla did some good work but in the end contributed nothing that we don't already know from Maxwell's equations.

    9. Re:Painful Read by Grishnakh · · Score: 1

      Supposing the space elevator is strong enough, what's the problem with making a passenger car with sufficient shielding? Obviously it'll take more energy then lifting an unshielded car, but it should still be far less than the energy needed to blast a rocket into orbit.

    10. Re:Painful Read by hardburn · · Score: 1

      What research do you base this statement on?

      The NASA feasibility study from the mid-90's.

      This is completely ridiculous. If that's true, why don't we already use wireless power?

      Because doing a whole house like that would take a lot of power, cause a lot of RF interference, and probably react badly with pacemakers. In any case, we're not looking at powering a bunch of light bulbs over an area, but rather beaming power to a specific target. A later study (PDF link) discusses using a laser for this purpose. Microwaves are also possible.

      --
      Not a typewriter
    11. Re:Painful Read by Anonymous Coward · · Score: 0

      I ignored the previous discussion, so I don't know what comments were made, but I've personally run some numbers on space elevators and they made my original enthusiasm a little tepid.

      There's a few things you should know. First, to the best of my knowledge, Liftport is not doing materials research. They're looking at and testing the mechanical design concepts for the climber. Carbon nanotubes are getting quite a bit more research investment from other sources. Also, structural carbon nanotubes will probably not be any more revolutionary compared to carbon fiber than carbon fiber was compared to fiberglass. Furthermore, the necessary strength in bulk material has not been achieved, nor do we even know if it will be achieved. The excitement about CNT's is because the single tube strength is high enough.

      The major breakthroughs for power transmission are, unfortunately, not in place. Power beaming is currently too ineffecient. I think the peaks are about 40% so far. We're talking about a climber that needs over a MW of power, which means it has to dissipate over 1.5 MW of waste heat at the receiving end...about a 1000 kitchen oven's worth. Not to mention no one has ever built a power beaming aparatus on this scale, lightweight or otherwise, and definitely no one has tried to use one over a 22,000 mile distance.

      There are plenty of issues slashdotter's as a population don't understand with regards to space elevators, but the above two are legitimate problems that stand in the way, and they will be far from trivial to overcome.

    12. Re:Painful Read by PhysSurfer · · Score: 1

      OK, granted, you could be correct in stating the unrolling would be easy, however my point still holds. If you can't make the cable in the first place, you can't unroll it!

  16. right about some things, wrong about others by Goldsmith · · Score: 5, Interesting

    Let me preface this by saying I work with carbon nanotubes (as an "innovator," not an engineer).

    Where these guys are right on is that building a CNT factory would generate the kind of money they need to get going, especially if they can reliably grow high quality tubes. They are absolutely right that spin off technologies could more than make up for their current investments. But, as they recently found out, nanotubes are very hard to grow in large amounts, and they grow very slowly... hence the current high cost.

    That leads to where they went wrong: They had "contractors" working on nanotube growth. It's not easy to grow CNTs, and it's not well understood. It's very difficult to reproduce published work on CNT growth unless you really, really know what you're doing. They need to form partnerships with the people working with nanotubes who are on the cutting edge of growth research. While they've tried and failed to build a factory, Iijima's group has made major breakthroughs in growing nanotubes in bulk, and he's the obvious person to start off trying to get on board with this (as a well known Nobel laureate working with nanotubes). If not his group, then any number of dedicated CNT-growth research groups in the US.

    At some point, it would not be a bad idea to let a scientist into the upper management of a space elevator company. Just as a smart inventor will let go of some control of a company to a business person, these business people would have been wise to let a scientist make some of their decisions.

    By (publicly, at least) focusing on robotics, they missed the boat on one key technology they needed which would have also provided them with the funds to keep everything else going. Hopefully whoever takes over leadership of the space elevator community has more luck.

    1. Re:right about some things, wrong about others by Anonymous Coward · · Score: 0

      Let me preface this by saying I work with carbon nanotubes (as an "innovator," not an engineer). 1) Admits to an agenda

      That leads to where they went wrong: They had "contractors" working on nanotube growth. 2) Complains for not being chosen to do research

      It's not easy to grow CNTs, and it's not well understood. It's very difficult to reproduce published work on CNT growth unless you really, really know what you're doing. 3) Spreads FUD about CNTs without giving any proof
      4) ???
      5) PROFIT!

      The scientific method should apply to comments on what is considered to some degree to be a more educated online community. I am more shocked posts like the above get modded up than some business man finding out that investors give money to business men. Sorry to sound like Stephen Colbert but anyone with 2 minutes and a log in name can make up 'fact' here.
  17. Re:I don't think Liftport will work and here's why by Anonymous Coward · · Score: 0

    I "worked" for Laine in the early 2000s. You could hardly call it a job, as he was employing high school students at the time to run his entire operation, paying them below minimum wage in what was surely a violation of local labor laws. He was running a struggling dot-com at the time, and he certainly provided no solid direction or achievable goals for the small band of web designers and techies that were crammed into his crummy office building with a broken elevator - which, it appears he's still hanging out in these days.

    Most of what you see in him sounds spot-on to me, from what I knew of him. He's a nice enough guy, but unless things have changed, he wasn't much of a business leader in any sense of the word. I'm really surprised that LiftPort is still alive. I would have figured the thing would have crumbled by now under the weight of its own far-fetched premise.

  18. Shift Key by afaik_ianal · · Score: 2, Insightful

    In other news, the founder of LiftPort has found his shift key.

    I think I lost any remaining respect I had for him when I read through his comments in the previous discussion. It might seem like a minor thing, but if the guy can't be bothered with little details like spelling, grammar, and correct capitalisation, then what were his chances of ever getting the SEC filings done correctly?

    It made him look like the kind of person who constantly churns. People like that can't focus on anything but developing their latest and greatest idea, and are unable or unwilling to ever do anything because they're already onto the next thing.

    1. Re:Shift Key by Anonymous Coward · · Score: 0

      it could just be some random dude pretending to be him and purposefully acting like a shitcock, or he could just be using poor punctuation. either way, it could really help his creditability to register accounts on any sites on which he plans to have an open discussion. michael j laine president liftport group.

    2. Re:Shift Key by afaik_ianal · · Score: 1

      Of course some of them certainly were fake, but at least some of them were really him. The post I linked to was actually me being a shitcock. The posts that led to the interview we are discussing here involved an anonymous editor who signed his name like that, and didn't use his shift key once. If those posts were not him, then this interview would never have happened.

  19. Cyclone effects? by Derling+Whirvish · · Score: 1

    Thin as a sheet of paper, 15 feet wide. And what is the wind loading on such a structure? The Pacific has category 5 cyclones you know.
    1. Re:Cyclone effects? by greg_barton · · Score: 3, Insightful

      What is the air-speed velocity of an unladen swallow? How many angels can fly on the head of a pin? How many people tried to build an airplane before one flew? How many people thought they were idiots? Who, in 1902, could tell you the amount of lift generated by the wing of a 747?

      Speculating now about the wind loading on a space elevator is akin to the last question.

    2. Re:Cyclone effects? by Eivind · · Score: 1

      It does. But only the bottom ~15km has significant wind-loads. That is a *very* small part of a 50.000km+ long cable. Thus the cable can be, if needed, strengthended and/or stabilised in this region without it adding much mass to the overall structure.

    3. Re:Cyclone effects? by Pippinjack · · Score: 2, Funny

      Is that an African or a European swallow?

      --
      hear all, see all, say nowt; eat all, supp all, pay nowt; and if tha ever does owt for nowt - do it for thissen
    4. Re:Cyclone effects? by Luyseyal · · Score: 1

      What is the air-speed velocity of an unladen swallow?

      According to Wikipedia, 24 mph.

      -l

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      Help cure AIDS, cancer, and more. Donate your unused computer time to worldcommunitygrid.org. Join Team Slashdot!
    5. Re:Cyclone effects? by terjeber · · Score: 1

      The Pacific has category 5 cyclones you know.

      No it doesn't. I have lived by the Pacific for more than a decade, and I haven't even seen a strong storm. They weren't going to put the space elevator over all of the Pacific. Please read the site before responding. The fact that there are cyclones in some parts of the Pacific doesn't mean that there are in all parts of the Pacific.

    6. Re:Cyclone effects? by Firethorn · · Score: 1

      It would increase expense and complicate matters by making the earthside platform immobile(and unable to dodge), but I believe that we could build a 15km tower today if it turned out to be necessary.

      Some quick research shows that the tallest tower today is 629 meters tall. There was once one that was 646.

      So we'd have to build a tower 24 times as tall as the existing one, which was built in 1963 in 30 days for $500,000(3.3 million in 2007 dollars).

      Figure the top section costs the 3.3 million, and each section below that increases in cost by 10%, we end up with a total cost of ~$300 million.

      On the other hand, you might want to build something more multipurpose, such as the taipei_101, a 500+meter, 101 story office/retail building. That cost $1.7 billion to build.

      I'd imagine that a large cone/volcano type shape might be best, very wide at the bottom, gradually narrowing to a spire, with the cable exiting it at the top.

      --
      I don't read AC A human right
    7. Re:Cyclone effects? by everphilski · · Score: 1

      you forgot to ask, African or European...

    8. Re:Cyclone effects? by naoursla · · Score: 1

      How many angels can fly on the head of a pin?

      I can't believe people use to debate that. The answer is obviously "three".

    9. Re:Cyclone effects? by TheRaven64 · · Score: 1

      Actually, the answer is one, but only because none of the others can dance.

      --
      I am TheRaven on Soylent News
    10. Re:Cyclone effects? by mfrank · · Score: 1

      Not at the equator. Which is where this would be. Storms are driven by temperature differentials and Coriolis acceleration, which are both pretty much zero at the equator in the middle of the ocean.

    11. Re:Cyclone effects? by Rei · · Score: 1

      The typical proposed location is just off of the Galapagos, chosen for being an abnormally calm equatorial region. Furthermore, with a mobile base platform, the elevator could actually be moved to avoid any problematic weather system that were to form.

      All we need is many miles of handwavium ribbon, and we're all set!

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    12. Re:Cyclone effects? by Tofystedeth · · Score: 1

      Handwavium? Not strong enough. We need Unobtainium.

      --
      "A little knowledge is a dangerous thing. Drink deeply or not at all."
  20. Re:As a general rule of thumb by Anonymous Coward · · Score: 1, Insightful

    Ha ha! This guy's a hilarious parody of a typical American.

    Honestly, Americans are getting out of the science business. I'm getting a PhD in condensed matter physics. In that specialization, in my class, there are two Chinese students, an Armenian and one American (me). That's pretty typical.

    You are right that the US government pays for a lot... all these international students sure appreciate their US grant-funded educations when they go home. Too bad our government, in all it's wisdom, requires them to do that after paying for their education.

  21. Re:As a general rule of thumb by Gorshkov · · Score: 2, Insightful

    All they do is steal everything and give nothing back, other than selling to us cheap products built by a slave labor force.
    Woah .... deja vue all over again.

    Is it just me, or were people saying that about Japan just before and after WW II?

  22. great rebuttal by Anonymous Coward · · Score: 0

    it is clear you are working hard on something your team believes in. That should be applauded. Others saying it "can't" be done, that is easy to say and then go have more frito's. It is those who say it "can" be done that move the world.

    Unless someone has spent some serious time reviewing the problems of space elevators, it will be hard for them to give any real indication of timelines or possibilities.

    Great job Liftport!

    1. Re:great rebuttal by Bastard+of+Subhumani · · Score: 2, Funny

      It is those who say it "can" be done that move the world.
      Like Icarus? He didn't move the world, just dented it a bit.
      --
      Only three things are certain; death, taxes, and apocryphal quotations - Ben Franklin.
  23. Re:Alternatives by RuBLed · · Score: 1

    And in the event of a mechanical or power failure it would just function as a space stair.

  24. Re:As a general rule of thumb by butlerdi · · Score: 2, Insightful

    Coming from that era I can say that one of the worst things that could be said about a product was that it was made in Japan.

    --
    "If the King's English was good enough for Jesus, it's good enough for me!" -- "Ma" Ferguson, Governor of Texas (circa
  25. A space elevator is basically a train by Colin+Smith · · Score: 1

    It's a rail system, or at least, the economics of it are almost the same. The specific technology may be a bit different. And yet, people choose air, road over rail to a truly massive degree all over the world, even in countries where the rail system is reputed to be superb.

    It's the same problem that solar power faces. If you took the cash spent to build a space elevator and invested it in other areas of the economy, you could basically fund conventional private space launches from now to infinity.

    --
    Deleted
    1. Re:A space elevator is basically a train by init100 · · Score: 1

      yet, people choose air, road over rail to a truly massive degree all over the world, even in countries where the rail system is reputed to be superb.

      Are you trying to imply that trains are running empty in those countries with superb rail systems? People in such countries use rail for different purposes than they use car or airplanes. Air travel is for long distance, rail is for medium distance and car is for short distance. At least, this applies to passenger travel in nations with affordable high-speed rail. Goods transport is a little bit different currently, but with increased environmental concerns, I think that we may see a shift back from lorries to rail for medium distance freight.

    2. Re:A space elevator is basically a train by z0idberg · · Score: 1

      Comparing Air/road vs. train and rocket/shuttle vs. space elevator isn't really equivalent...

      Maybe if after every flight or car trip you threw the car or plane (or bus or whatever) away and couldnt use it again (or at least a large proportion of the vehicle was thrown away).

      And if the cost of fuel for air/road travel was orders of magnitude more expensive than the fuel/propulsion for train travel. Yes the R+D still needs to be spent on the space elevator, but that doesnt mean the same amount wasnt already spent on Car/plane R+D.

      And where exactly are you going to get rocket fuel from in 200 years time? let alone anytime closer to infinity? (If you are suggesting something else will be used other than rocket fuel in the future that is probably going to cost a lot in R+D as well).

    3. Re:A space elevator is basically a train by Colin+Smith · · Score: 1

      I'm implying that 90% of travel is by other methods and that trains are unprofitable unless they are subsidised to about half of their operating costs every year.

      --
      Deleted
    4. Re:A space elevator is basically a train by mrvan · · Score: 1

      Did it ever occur to you that car travel is subsidized heavily by road construction payed by taxpayers (and at least over here road and fuel taxes cover only a small percentage of that cost)

    5. Re:A space elevator is basically a train by drinkypoo · · Score: 1

      I'm implying that 90% of travel is by other methods and that trains are unprofitable unless they are subsidised to about half of their operating costs every year.

      Yes, and the system of traveling about in our own vehicles isn't profitable without subsidies, either. Your taxes pay for the roads just as they used to pay for rail.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    6. Re:A space elevator is basically a train by Jack9 · · Score: 1

      And where exactly are you going to get rocket fuel from in 200 years time?
      Probably from the same place you get the energy to keep an object capable of maintaining geosync positioning for years (including the time it takes to build and test the elevator)...not exactly trivial given the forces acting on it. The technology that's required for the space elevator makes it unnecessary.
      --

      Often wrong but never in doubt.
      I am Jack9.
      Everyone knows me.
    7. Re:A space elevator is basically a train by init100 · · Score: 1

      and that trains are unprofitable unless they are subsidised to about half of their operating costs every year.

      You could also say that air travel is heavily subsidised, as they pay no energy taxes. If they would pay the same energy taxes as ground vehicles, they might go bust in an instant.

  26. Re:It was doomed to failure by Urkki · · Score: 2, Interesting

    The funny thing is that the one impetus that would absolutely, positively guarantee that the US would build a space elevator is if the EU, Russia, or China started work on one. Have no doubt: no-one on the planet will be permitted to build a space-elevator before the US or without US involvement; the federal/military complex in this nation wouldn't permit it. By the time building a space elevator is a practical possibility, I doubt US is in a position to prevent other world powers from doing anything much (except by starting WW3, which I don't think is an option, because the rich bastards at the top really do not want to live in a private luxury radiation shelters for the rest of their lives). The balance of economic power is shifting to the east, and I don't see that development reversing without a major worldwide crisis, and then building a space elevator would probably not be a high priority for anybody... And with economic power goes the power to meddle with other nations' business, such as building a space elevator.

    But if we end up with a "bipolar" cold war world, then you're right. Obiviously if one block starts to build an elevator, the other block has no option but to start building one as well, and certainly US will still exist and be in one of the blocks by the time we can practically build one. Of course there's no guarantee that the block with US would get their elevator finished first, but I don't think that really matters as long as both blocks would get their elevators working in the same decade or so. Considering the possible problems that won't be discovered until the elevator is finished, it might even be desirable to be the 2nd, a few years behind, so that there's still time to alter the design if some unforeseen problem is discovered by the 1st.
  27. Nvidia by SharpFang · · Score: 3, Insightful

    Microsoft, IBM, GE, Ford... All these companies base many of their product designs on future technology. If you started designing
    a computer program around the computers available at the beginning of the design process, or designed the program on your
    prediction of the computers available at the end of the development process, the latter would be the better product - suited to
    the technology available at the time the consumers were ready to use it.


    Nvidia does too. Like, the GeForce FX series of their cards. They were to be released together with DirectX 9. Except that nobody knew what DX9 would support and due to some disagreement between Nvidia and Microsoft, Microsoft wouldn't tell. So Nvidia was "predicting the features of DirectX 9". That is, guessing. And guess what? They guessed wrong. GeForce FX was packed with wonderful features which had no support whatsoever in the OS, while features required by DX9 were quickly hacked into the drivers and worked at snail speed in software emulation.

    Sure -sometimes- the predictions work. But when it doesn't, it fails hard.

    --
    45 5F E1 04 22 CA 29 C4 93 3F 95 05 2B 79 2A B2
    1. Re:Nvidia by Grishnakh · · Score: 1

      This is exactly why Nvidia should be pushing open-source and OpenGL more, instead of being Microsoft's bitch. It's a lot easier selling your product if you have some control over other components (the OS and software) that customers need to use your product.

  28. ft.? by kwikrick · · Score: 1

    They measure their tethered towers in feet? They cannot be serious about science. Geostationary orbit is at 36000 KM. Who builds a spacecraft to go to 118110236 ft? Yuck.

    --
    assignment != equality != identity
  29. Space Guns anyone? by Ignatius · · Score: 4, Informative

    I know it's slightly offtopic, but I always wonder why a highly speculative and fragile concept like the space elevator which is barely theoretically possible is getting so much press, while space guns, which are cheaper, more robust and don't require any new technology, are practically ignored.

    In case you're not familiar with the concept: It's basically about accelerating a small vessel (by a light gas gun, a RAM accelerator, electromagnetically or a combination thereof) in a relatively short (about the order of one km) barrel / tunnel to about orbital speed. The vessel itself will only require enough fuel for circularizing its orbit, so unlike conventional boosters, a much bigger part of its mass can be actual payload as the exponential regime of the rocket equation can be mostly avoided.

    While the capital costs will be high, a space gun is still dirt cheap compared to a space elevator, and isn't prone to be completely destroyed when hit by lightning, space debris or, for the matter, a shotgun.

    http://en.wikipedia.org/wiki/Space_gun
    http://www.fas.org/news/iraq/1998/05/980500-bull.h tm
    http://www.astronautix.com/lvs/julncher.htm

    1. Re:Space Guns anyone? by Firethorn · · Score: 1

      Because the required accelerations are so high that everything has to be specially hardened to survive it, and we have no hardened alternatives for many materials?

      --
      I don't read AC A human right
    2. Re:Space Guns anyone? by wild_berry · · Score: 1

      I'm looking for investors in a company that's planning to make a Space Gun Accelerator and we're going to be using Carbon Nanotubes, you insensitive clod!

    3. Re:Space Guns anyone? by Rycross · · Score: 2, Interesting

      Beyond only being useful for cargo that can withstand thousands of g's of acceleration, you also have a couple of other problems. First, you have to account for atmospheric drag with your initial velocities. That means you have to be traveling at a speed higher than orbital velocity.

      But the real problem is this. We have a term for hitting Earth's atmosphere at orbital velocities. It's called re-entry. It's problematic for normal space vehicles which will bleed off speed in the thinner upper atmosphere at orbital velocities. Now what happens when you launch a payload in the thicker part of Earth's atmosphere, at speeds greater than orbital velocity? I'm guessing a fiery ball of death.

    4. Re:Space Guns anyone? by amchugh · · Score: 1

      One must accelerate to over 6.96 miles per second to hit escape velocity, so except for metal ingots I'm not sure what you'd be able to launch. I know project harp built several hardened probes, but there are definite limitations on the type of payload you can send up at that speed. You also need a gun with a very even slope, and huge tensile strength.

    5. Re:Space Guns anyone? by drinkypoo · · Score: 1

      I know it's slightly offtopic, but I always wonder why a highly speculative and fragile concept like the space elevator which is barely theoretically possible is getting so much press, while space guns, which are cheaper, more robust and don't require any new technology, are practically ignored.

      Two reasons. One, they do require new technology, because current designs aren't designed to handle the absurd G-forces from such a gun. Two, they are useless for humans, so it is hard to get humans excited about them.

      The space elevator is exciting because it opens the stars to humans - when it becomes that cheap to lift mass then you can start thinking about sending up equipment for mining asteroids, and that's the last step necessary before you can engage in truly large-scale engineering in space.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    6. Re:Space Guns anyone? by ArsonSmith · · Score: 1

      So why can't a space gun be used to break a ship or shuttle of it's initial inertia? thus either lowering the booster size requirements or allowing for more payload. No reason to completely get rid of a working technology. Just call it a 'hybrid' and you'd have a bunch of supporters right off the bat.

      --
      Paying taxes to buy civilization is like paying a hooker to buy love.
    7. Re:Space Guns anyone? by Anonymous Coward · · Score: 0

      This is just as unfeasible as the Space Elevators. Do you have any idea how many G's the cargo is subject to? You're looking at hundreds of thousands. Imagine a microchip weighing even just 50,000-100,000 times what it does normally, it'll crush itself unless you make the accelerator really, really, really long to reduce the G's. Which of course means increasing the cost. It's easily still in the billions of dollars to make such a launch system.

    8. Re:Space Guns anyone? by sandmaninator · · Score: 1

      Criticisms of space guns always seem to revolve around not being able to deliver a payload to space without it suffering either extraordinarily high Gs or burning up in the atmosphere. But I would think providing some form of lift to a spacecraft would lower the amount of propellant and increase the workable payload of any spacecraft.
      After all, how much energy does it take to accelerate a huge spacecraft resting on the ground to 50 mph??
      I would think quite a lot! Why dump rocket fuel to accomplish that?
      Should be much more efficient to give it a little push!

    9. Re:Space Guns anyone? by Ignatius · · Score: 1

      For the acceleration issue: Sure, a space gun is not an all-purpose transport, but neither does it have to be. Even today, most of the mass we lauch to space, at the point the spacecraft reaches the first cosmic speed is fuel, esp. when the intended orbit or trajectory is higher than LEO.

      If the goal is to establish a permanent space presence and bootstrapping a space economy, then it's safe to assume that at least initially more than 90% of the cargo will be fuel and reaction mass, with oxygen and water being a good part of the rest, until we are able to get this stuff from astroids. I guess you should also be able to lauch solar pannels and comparable equipment, although maybe not in their final configuration.

      IMO, what we eventually need is not one but 3 lauch systems: A space gun for fuel and other bulk cargo (which is mass-wise the biggest fraction), a big dumb bootster to dry-lauch larger structures and technical equipment which cannot handle the 1000+ g acceleration, and some sort of man-rated passenger-only shuttle for the crews.

      As for the other issues you mention: Sure, the atmospheric losses will be higher than with rockets (IIRC one of the sites mentioned 25%). OTOH, you have no gravitational losses as you are ballistic from the start. Of course, any vessel will require a heat shield. But those can be cheap heavy expendible ablative shields as, unlike a rocket, you don't have to pack many time its weight in fuel to get it up there and you will need a solid casing anyway to survive the lauch.

      Building a workable space gun is surely a challenge, but much practical research has already been done (including stuff like g-hardend electronics and navigational equipment) and no major breakthroughs are required. The greatest disadvantage, besides the initial acceleration is probably that it doesn't provide much flexibility for choosing orbits (basically all you can vary is v_0) which makes it less useful for the LEO satellite business which currently dominates the market.

    10. Re:Space Guns anyone? by DerekLyons · · Score: 1

      So why can't a space gun be used to break a ship or shuttle of it's initial inertia?

      Because in exchange for billions of dollars for the gun and insane design constraints on your ship or shuttle, you save a few tens of thousands of dollars worth of fuel.
    11. Re:Space Guns anyone? by DerekLyons · · Score: 1

      After all, how much energy does it take to accelerate a huge spacecraft resting on the ground to 50 mph??

      A few tens of thousands of dollars worth of fuel. Compared to a billion or more dollars for the 'gun' and the insane design constraints imposed on your vehicle... The tradeoff isn't even close.
    12. Re:Space Guns anyone? by Ignatius · · Score: 1

      > You're looking at hundreds of thousands [of Gs].

      No, it's actually two orders of magnitude below that for reasonably sized barrels. For constant acceleration, the formular is a=0.5*v0^2/l. Assuming v0=8000 m/s and a 1 km barrel, you end up with a=32000 m/s2 (about 3300 g). So you end up in the 4-figures. Still a lot, but quite managable and in line with heavy artillery shells. Esp. electronics has no problem to cope with this kind of acceleration (hardend equipment can easily deal with 10 times more).

  30. Start collecting old high-quality plastic now by Anonymous Coward · · Score: 0

    I have a skateboard from the 80's with plastic trucks and board and wheels that seems somewhat indestructible compared to standard decks. Did we use up all the high-quality oil? Now what do we build the elevator cord out of? Can the long chains of carbon be duplicated through nanotech production or does it take millions of years?

  31. Speed to Orbit (Re:Painful Read) by amck · · Score: 1

    Speed to orbit? Why do you need to go fast? People used to take months to cross the Atlantic, and the treasures offered by cheep space travel are massive compared to the treasures of the New World. Or just send up cargo on the elevator and send people on a rocket (expensive and dangerous in comparison, but quick).


    The reason speed to orbit is important is the Van Allen radiation belts. You can't afford to spend several days passing through them to orbit.
    You also can't afford to put much shielding on the lift climbers - they're severely weight constrained. This makes space elevators useful for cargo, maybe,
    but not humans, unless you come up with a Magic Wand ( (TM) Charlie Stross) breakthrough.

    Now on the Moon, or Mars, the situation looks a lot better ...
    --
    Anyone who believes exponential growth can go on forever in a finite world is either a madman or an economist
    1. Re:Speed to Orbit (Re:Painful Read) by CastrTroy · · Score: 1

      But humans are pretty light, so if we have to transport them with rockets, and use the space elevator for the other stuff. The reason the space shuttle sucks so much is because it's a compromise to be able to safely lift humans and yet also lift some heavy cargo. In reality what they should have done was had 2 separate programs. One to build a spacecraft that would transport people, and another that would transport the heavy cargo loads.

      --

      Anthropic principle: We see the universe the way it is because if it were different we would not be here to see it.
    2. Re:Speed to Orbit (Re:Painful Read) by Anonymous Coward · · Score: 0

      This isn't a deal breaker though. Even if the space elevator can't be used for humans directly, it can make bringing humans into space much cheaper, because it can dump basically unlimited amounts of support materials directly into space. You don't have to carry any air, food, water, or fuel with you other than the bare minimum to get to low earth orbit. You can launch in the tiniest of capsules to a very low orbit, then rendezvous with a robotic space tug which can be as roomy as you like and have literally tons of air, food, water, and fuel. You might even be able to use some sort of scramjet-powered aircraft to get high enough for the initial rendezvous. Once you've got basically unlimited resources in orbit, getting to the Moon or Mars becomes much, much easier, and resupplying manned bases also becomes feasible.

  32. Right... by Colin+Smith · · Score: 1

    And a space elevator will make it all free... A space elevator is anything but cheap.

    --
    Deleted
    1. Re:Right... by splutty · · Score: 1

      And a space elevator will make it all free... A space elevator is anything but cheap.


      You my friend, are totally missing the point. The actual building of a space elevator might be insanely expensive, but once it's there, getting things into space will be insanely cheap (in comparison to current day prices), and actually building a spacecraft that doesn't need to get out of the earth's gravity well would be feasible. This opens up a whole new way of doing things, and a whole new avenue for exploration (we might actually *get* to mine all those asteroids, after all, we can also cheaply send down all those minerals)

      Getting rid of the expensive, unreliable bigass fireworks we're using today would be worth it.
      --
      Coz eternity my friend, is a long *ing time.
    2. Re: Right... by The+Cornishman · · Score: 1

      once it's there, getting things into space will be insanely cheap
      No it won't. The owners of the Space Elevator will have an insanely large debt to service, which they will do by charging just a leetle bit less than the ESA for the privilege of putting your payload into orbit. This is just market economics. Also, they probably won't accept payloads consisting of large lengths of carbon nanotube ribbon...
    3. Re:Right... by Colin+Smith · · Score: 1

      but once it's there, getting things into space will be insanely cheap (in comparison to current day prices) Really... What does the interest payment on a trillion dollars worth of debt look like? It looks something like 20 billion a year on a good day. Then there's the running, maintenance and insurance costs. Oh wait, I understand now... You thought that money was free and it would be built on a shoestring. Ah bless...

      What does a launch cost? 20 million? 100 million for a biggie? Then if there's a market for launches, the costs will drop.

      --
      Deleted
    4. Re:Right... by HellFeuer · · Score: 1

      its a hell of a lot cheaper than a bunch of rockets (if built of course ;)

      RTFA.. their target cost is $400/lb.. thats several orders of magnitude cheaper than rockets

    5. Re: Right... by Dan+Ost · · Score: 1

      The first thing they plan to do one the space elevator is complete, is to build a second space elevator (at greatly reduced cost since they can use the first space elevator to move the materials instead of expensive rockets).

      --

      *sigh* back to work...
    6. Re:Right... by CastrTroy · · Score: 1

      Maybe the US government can tell you a little about handling trillions of dollars in debt.

      --

      Anthropic principle: We see the universe the way it is because if it were different we would not be here to see it.
    7. Re: Right... by Firethorn · · Score: 3, Informative

      From what I've seen, one of the first priorities once you get the first ribbon set up is to set up a second. That way if something does happen, you still have another ribbon.

      That and you'd still be able to max cargo transfer for two ribbons at prices that net you more money than the prices you can get for the cargo capacity of one ribbon. (IE 1X$800/kg < 2X$600/kg)

      --
      I don't read AC A human right
    8. Re: Right... by naoursla · · Score: 1

      Some others have commented that building a second elevator is a high priority. Getting the first elevator hooked up is difficult and expensive because you have to drop the end of the cable from space and catch it.

      LiftPort is planning for their lift vehicles to do two things (planning is probably too strong of a word though). The lift vehicles will to repair and maintenance of the ribbon and they will add a little bit to the edge of the ribbon. When the ribbon becomes wide enough, a vehicles travelling up splits the ribbon into two. They anchor the new piece on a second floating ocean platform and move it away.

      They really don't want to drop a second cable. They expect that to be very expensive.

      If you are producing cables on Earth and plan to do a cable drop for each elevator, you will not be able to compete with them.

    9. Re:Right... by drinkypoo · · Score: 1

      Current cost to orbit is $5,000 to $10,000 per pound (of weight at sea level, whee. oddly enough I've always seen this as a cost per weight, not per unit of mass. But anyway) whereas these guys says their target is $400/lb. More than an order of magnitude off the current low end price to orbit.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    10. Re: Right... by xaonon · · Score: 1

      Given the first elevator, new ones can be put up much more cheaply. That in turn will allow a much larger volume of cargo, allowing the costs to be amortized. If lifters go up as often as commercial airlines, they won't be much more expensive.

      There's also the benefit that unlike a rocket, an elevator absolutely won't explode, which is a great comfort to anyone skittish about sending up fragile or expensive cargo (such as humans).

    11. Re:Right... by Grishnakh · · Score: 1

      This is exactly right, and this is why it doesn't make any sense at all to build a bridge across a river, when you can do the same thing with a ferry. Also, if you have a river with lots of violent storms, it doesn't make any sense to build an underwater tunnel for cars, because it's too expensive. Just use ferries; it doesn't matter if a few ferries sink every few months.

    12. Re: Right... by Grishnakh · · Score: 1

      Exactly. This is also the reason why it never makes sense to build bridges, because you can just use ferries instead. Every time I cross a bridge, I have to pay so much that I might as well just use a ferry...

      It sure is a good thing the US never wasted any money building bridges for interstate highways, and instead just uses ferries.

    13. Re:Right... by Grishnakh · · Score: 1

      What does a launch cost? 20 million? 100 million for a biggie? Then if there's a market for launches, the costs will drop.

      Try about 300 million dollars for a typical shuttle launch. And even this is tiny compared to the mass needed to build any kind of decent space station or lunar/mars colony.

      The costs for launches don't drop because the fuel and equipment costs are basically fixed (and rising). Fuel isn't getting any cheaper.

    14. Re:Right... by DerekLyons · · Score: 1

      Try about 300 million dollars for a typical shuttle launch.

       
      Who cares? The Shuttle isn't representative of typical launch prices - in fact it is way the hell over on the right hand side of the bell curve.
       
       

      The costs for launches don't drop because the fuel and equipment costs are basically fixed (and rising). Fuel isn't getting any cheaper.

      Equipment costs are variable - and dropping. (See Elon Musk and SpaceX.) Fuel is prices are (currently) down in the noise when it comes to costing out a space launch (the cryogenics for a Shuttle will run you about a million, million and half on the open market). Fuel prices would have to rise by an order of magnitude or more before they even became a faint concern. (And the cost of cryogenic fuels will vary with the price of coal - not oil. Electricity is the only energy input into their production.)
    15. Re:Right... by Grishnakh · · Score: 1

      Who cares? The Shuttle isn't representative of typical launch prices - in fact it is way the hell over on the right hand side of the bell curve.

      True, but it's still a factor. The Soyuz may be much cheaper to launch, but if you want to bring large cargo back down intact, it won't work for that. I imagine a significant part of the cost differential of the Shuttle vs. the Russian rockets is that US labor costs so much more. There's thousands of engineers, technicians, and others involved in every launch. Plus there's tons of maintenance work involved. A space elevator would eliminate a lot of those costs, because (theoretically) it shouldn't require much maintenance, and whatever it did require would be spread out over far more tons of cargo than with rockets.

    16. Re:Right... by DerekLyons · · Score: 1

      No, the Shuttle isn't a factor. It's going nowhere but the ISS (and one possible mission to Hubble) and it's being retired in three years.

  33. Why is when i read... by pjr.cc · · Score: 1

    Why is it when i read about the space elevator i think of the episode on the Simpsons where Marge says: "And that was the only folly the people of Springfield ever embarked upon. Except for the popsicle stick skyscraper... etc"

    Interesting read though...

  34. Building a space elevator the easy way by Colin+Smith · · Score: 1, Troll

    1: There is no current technology which could be used to build a space elevator. Even if there was, it would be decades before it was complete.
    2: There is no engineering knowledge on how to build such a structure.
    3: You know it's going to cost billions. Frankly, it's almost certainly going to cost trillions to build. That money isn't in place, but then a space elevator isn't going to be feasible for decades. If you think taxation should pay for it you can fuck right off, this elevator is something you want, I couldn't care less.

    So. Today, the only thing you can even plan to do is to generate the cash which might just be used to finance the space elevator. That means an investment fund invested in relatively high risk/return securities, with enough return to allow grants to be skimmed off for promising materials and engineering research. In 20 or 30 years there may be enough cash to get something off the ground.

    If you really want a space elevator, this is what you need to do. If you're not doing it... It can't really matter that much to you.

    --
    Deleted
    1. Re:Building a space elevator the easy way by Hal_Porter · · Score: 1

      3: You know it's going to cost billions. Frankly, it's almost certainly going to cost trillions to build. That money isn't in place, but then a space elevator isn't going to be feasible for decades. If you think taxation should pay for it you can fuck right off, this elevator is something you want, I couldn't care less.

      If it gets built it will probably get built by the US DOD, or a consortium of national space agencies. Or a mixture of both. Which means for better of for worse people won't have to vote on it directly. Well I guess Congress would, but it will attached to some absurdly porky budget bill. So the cash will be stolen from the George W Bush memorial highway and the Donald Rumsfeld aircraft carrier. Plus I bet if it were technically feasible (which it isn't at the moment), there'd be some kind of space race type phenomenon with China vs the US and allies and the US would want to beat the bad buys to completion and make sure the pork went to US companies.

      --
      echo -e 'global _start\n _start:\n mov eax, 2\n int 80h\n jmp _start' > a.asm; nasm a.asm -f elf; ld a.o -o a;
    2. Re:Building a space elevator the easy way by PermanentMarker · · Score: 1

      And what did Space rocketry cost us so far ?

      We had all these same problems before.
      As it was impossible to go to the moon.
      It was SF in the time of Jule Verne, but we have been there.
      Or perhaps you think that was a holywood movie?

      In the end it will come down to one question, and its only a result from calculations
      Lucky for us we live in a time with computers (which didn't exist in Jule Verne's time) the question is

      1) what will cargo transfer cost compared to current rocket lifting technology

      --
      I know you're out there. I can feel you now. I know that you're afraid. You're afraid of us. You're afraid of change.
    3. Re:Building a space elevator the easy way by robcraine · · Score: 1

      Vague handwaving here... but I seem to recall a statement Elsewhere that you could build an elevator out of steel. You would neeed an awful lot of it... and it would be shaped more like an inverted pyramid than a ribbon or piece of string, but it would be strong enough to support itself, and its cargo. What I want is a way to invest in these speculative projects. I don't want to buy a mug. I don't want to give them a paypal donation. I want to invest a couple of hundred bucks I can afford to loose just to see what happens. It could turn into my retirement fund.

  35. Bravo Mr. Laine! by weightman · · Score: 1

    Mr. Laine and colleagues, Everyone to ever attempt anything truly grand in the history of the world has faced ridicule for it. It is a great honor for you and your team to join their company. I am sure these people in love with the idea of sitting atop a controlled explosion now were the same type that scoffed at the notion of launching a rocket into space in the first place, landing on the moon, launching a space telescope, or anything else their tiny imagination can conceive. At one time all these things were "impossible" for them to believe. Bravo Mr. Laine. I can't give you any of the money you need right now, but I will gladly join your forum, subscribe to your newsletter, and support you anyway I can. Primarily right now, all I can give is my sincere expression of gratitude to you for offering me the kind of inspiration so often lacking in this world full of such small minds. Thank you very much.

    1. Re:Bravo Mr. Laine! by Choad+Namath · · Score: 1

      The problem is that he sounds like he's concentrating on and hiding behind this idea of being innovative rather than worrying about feasibility. Anyone can come up with a grand idea, but it's actually making that idea reality that sets you apart. He seems to have some sort of disdain for engineers, and dismisses them by saying that they're just concerned about "triple redundancy" and safety factors. He fails to realize that we engineers got started by cobbling things together in our garages or playing with a breadboard in our bedrooms. To actually create something, you need to get your hands dirty. It takes a lot more than an idea to innovate.

    2. Re:Bravo Mr. Laine! by db32 · · Score: 1

      Not that I entirely disagree, but I offer this in his defense. As he mentioned flying was not feasible for a long while. As a great number of other things, and typically the true engineers are the ones pointing and laughing because of how silly and stupid an idea is, with their vast knowledge of how things are supposed to work. The engineers only get involved when enough tinkerers have cobbled together something that looks like a real engineer might be able to clean up into something feasible. This is somewhat ironic because you are right, many engineers got started as tinkerers, but somewhere along the line they frequently lose that tinkering aspect and fall into "the correct way". It really is no different in a number of fields or environments where the lowly worker knows how stupid or unrealistic various high level decisions are, but when they get there themselves they fall into the trap of making the same stupid and unrealistic decisions while laughing at the underlings for not understanding.

      --
      The only change I can believe in is what I find in my couch cushions.
    3. Re:Bravo Mr. Laine! by weightman · · Score: 1

      It doesn't sound like he is hiding anything to me, spending his own money on the project. It sounds like he is pretty concerned with and believes in its feasibility to me. It also sounds like there is some spin off technology that has already produced results as well. How long did NASA fail before they got in to space? How much money did they spend? So, he and his team had a setback. Sounds like part of science and the process of daring to try something new and difficult. It sounds as if they are reconstructing the company around products and services they already managed to produce and will likely begin making some money. Since the idea is sound, I expect its only a matter of time till they get the funding they need to continue the effort. Meanwhile if you want to talk about wasting money on ridiculous things, lets look at the space shuttle, which costs like billions just to launch, and the space station which costs like trillions just to stay afloat, all operating under stolen funds from the taxpayers. And, its only a matter of time till all the shuttles blow up of course. They are an idiotic way to get in to space and obsolete. But, is NASA with all their excellence and massive funding spending their full resources for a SSTO vehicle? Don't make me laugh. I can't understand why people are frightened of new ideas. I'm frightened of the old ones. John Cage (1912 - 1992) Lack of money is no obstacle. Lack of an idea is an obstacle. Ken Hakuta Man's mind, once stretched by a new idea, never regains its original dimensions. Oliver Wendell Holmes (1809 - 1894) Don't worry about people stealing an idea. If it's original, you will have to ram it down their throats. Howard Aiken (1900 - 1973) An idea is salvation by imagination. Frank Lloyd Wright (1869 - 1959) Good ideas are not adopted automatically. They must be driven into practice with courageous patience. Hyman Rickover (1900 - 1986) Good ideas alter the power balance in relationships, that is why good ideas are always initially resisted. Good ideas come with a heavy burden. Which is why so few people have them. So few people can handle it. Hugh Macleod, How To Be Creative: 1 Ignore Everybody, 08-22-04

    4. Re:Bravo Mr. Laine! by DerekLyons · · Score: 1

      Mr. Laine and colleagues, Everyone to ever attempt anything truly grand in the history of the world has faced ridicule for it. It is a great honor for you and your team to join their company.

      Sure, the laughed at Columbus. But they also laughed at Bozo the Clown.
  36. Re:It was doomed to failure by butlerdi · · Score: 4, Interesting

    Well, just saw this

    EuroSpaceward was just awarded funding by The National Research Fund of Luxembourg to hold a workshop on space elevator climber and tether design primarily focusing on systems for entry in the US and German competitions. The tentative dates are Nov. 14-16, 2007 and the workshop will be held in a yet to be announced venue in Luxembourg.

    found at http://www.spaceelevator.com/

    So it does seem there is still some interest outside US, albeit for entering a NASA based competition. I think that the immigration problems in the US for foreign students will quickly have some negative effect on innovation in the US in the long term. Innovation in the US has always been due to it's courting of students world wide to study and then contribute.

    --
    "If the King's English was good enough for Jesus, it's good enough for me!" -- "Ma" Ferguson, Governor of Texas (circa
  37. Re:It was doomed to failure by dintech · · Score: 1

    Hmm. How exactly would they stop China from achieving this if that's what they wanted to do?

  38. Re:As a general rule of thumb by Gorshkov · · Score: 1

    Coming from that era I can say that one of the worst things that could be said about a product was that it was made in Japan.
    Absolutely .... and just as Japan changed and improved, so will China. That was my point
  39. Golden Opportunity Wasted. by cpaglee · · Score: 2, Insightful

    Imagine a guarantee pitch your business plan on Slashdot? LiftPort took "a few weeks" to prepare their response and this is the best they could come up with? Where is the PowerPoint presentation? Where is the Corporate Summary? Where is the business plan? Where is the investor's prospectus? Wouldn't they think to provide links to these critical documents at the BEGINNING of their response? I downloaded Roadmap and it is nothing more than a very boring excercise in project management spanning a couple of decades. The parents to this post are spot-on. It is a crying shame that LiftPort wasted such a wonderful opportunity. I would give anything to be able to pitch a business plan to the Slashdot community.

    Venture Capitalists invest in a team, first and foremost. The inability of this 'team' to take advantage of this incredible wonderful opportunity to 'Pitch' to the entire Slashdot community guarantees their inability to raise investment capital, at least not from professional investors. Lack of a Chief Scientist with a PhD in nano-technology on their 'team' is also a guarantee for failure. Perhaps this explains why they attempted to raise money through a Reg. 504d stock offering. They don't even have bios for their 'team' on their website! A company raising money through professional investors must include their team on their web site.

    Michael Laine et al have NO IDEA what is required to run a business of this magnitude. LiftPort will fail, not because their idea is impossible, but because the problem they are trying to solve is monumental and their team lacks the experience and the charisma to turn a dream into reality. As a result they will be unable to attract professional investors, and you are not going to build a space elevator by selling T-Shirts online. Mr. Laine may be a visionary, but his time and money would be better spent writing visionary books.

    1. Re:Golden Opportunity Wasted. by Firethorn · · Score: 1

      Venture Capitalists invest in a team, first and foremost. The inability of this 'team' to take advantage of this incredible wonderful opportunity to 'Pitch' to the entire Slashdot community guarantees their inability to raise investment capital, at least not from professional investors.

      They're already in trouble for violating investment laws. Do you want them in *more* trouble?

      There's rules in place that basically say that venture capitalists can't seek money from people who don't have or make a *lot* of money(I've heard that it's a million in net worth or $100k annual income). While normally venture capitalists would probably seek the said rich people anyways(easier to get a few big investors than lots of small ones), if they were able to get $1 per slashdotter ID it'd be around $2 million for them.

      The problem is one of seperating the risky ventures from the outright frauds like water powered cars, magnet-powered motors(ie need no electricity), etc...

      --
      I don't read AC A human right
    2. Re:Golden Opportunity Wasted. by dbIII · · Score: 1

      The problem is one of seperating the risky ventures from the outright frauds like water powered cars, magnet-powered motors(ie need no electricity), etc...

      In this case it's easy to work out - they need a material that has not been invented yet and are not putting efort into inventing it. In my opinion either they are waiting for somebody else to drop something into their lap for close to free or it is a scam.

    3. Re:Golden Opportunity Wasted. by cpaglee · · Score: 1

      The term that you are looking for is a Certified High Net-Worth Individual. The obligation is on the company NOT to take any investment from somebody who can not be certified as a high net-worth individual. LiftPort should have returned their checks. BTY, in general the standard is not to put more than 15% of your total net worth into high risk investments, although LiftPort is something I would pass on altogether.

      The point I was trying to make is that a LOT of people in the private equity and venture capital industry read Slashdot and follow it for hot new ideas. Even more Angel Investors read Slashdot. And Slashdot is a wonderful resource for feedback and ideas based on your ideas, regardless of income level. So the opportunity to pitch to the Slashdot community is ... absolutely incredible.

      More importantly, EVERY SINGLE VC that would seriously consider investing in LiftPort will read every single one of these posts on both this and the first Slashdot story. This is just basic due diligence. They will look at Mr. Laine's past companies, his successes, failures, and the resume's of the key people on his team. The rebuttal is whiny, unfocussed, and lacks the razor sharp crystal vision that investors want to see. By posting this rebuttal they have all but guaranteed that no VC will ever invest in LiftPort.

    4. Re:Golden Opportunity Wasted. by cduffy · · Score: 1

      they need a material that has not been invented yet and are not putting efort into inventing it.
      They claim that they are contracting others to do that research. Do you have reason to believe this to be incorrect?
    5. Re:Golden Opportunity Wasted. by Firethorn · · Score: 1

      I think that you've hit upon the whole point of the laws - supposably 'rich' investers have the resources available to be able to make an informed decision, and not have to risk their life savings to invest in startups, which are risky pretty much by nature.

      Your average middle class and lower person doesn't have this ability. Many get taken each year in fake charity scams, nigerian emails, etc...

      --
      I don't read AC A human right
    6. Re:Golden Opportunity Wasted. by dbIII · · Score: 1

      They claim that they are contracting others to do that research. Do you have reason to believe this to be incorrect?

      No names, no funding announcements and apparently not enough money flowing through to fund such work unless that was another lie. Ten graduate students in India without money for equipment are not going to solve this in a year (example is purely becuase they are paid less there). Above board schemes proudly announce that they are giving work to Dr X at University Y, or at least advertise that they will give a grant to whoever puts in the best proposal to do the work. Also without a technical member of staff to actually determine whether the contracted researchers are likely to be able to do the work they are not even attempting to give this a go. I gave up on materials science to become a computer wrangler a few years ago but even I have more knowlege of these subjects than this bunch of MBAs - they don't have anybody that is recognised by peer review as having a clue on any aspect of their operation in this group. That rings alarm bells for me becuase there would be many that would like to take part in such a project.

      Another parallel example was the Cape York Spaceport proposal in Australia - the company was a manager and a secretary and he was going to contract everything out. I'm not sure how many millions he left with. This is a different case but the entire thing also appears to be pitched more at getting money out of the sort of investor with big dreams but a mistrust of established scientific and engineering bodies - he's not aiming for the Rupert Murdochs but the investor that will not get an opinion from an expert.

      The viability of a beanstalk as a real thing and not a SF plot device is an exercise I leave to the reader - remember that all that mass lifted into orbit is only useful if it is part of a larger project involving shifting far more mass. Personally I think the lack of viability of the project and the argument over whether it is useful anyway clouds the issue enough to confuse potential investors and keep them away from anyone that could tell them it was a scam if they could see the details.

  40. WILLIAMSBURG DOESN'T NEED A SPACE ELEVATOR! by Morky · · Score: 1

    The Space Elevator Will Mean: Less Parking, Weird Ribbon Thing, Constant Loud Whirring Noise, Increased Space Elevator Truck Traffic. Developers have submitted plans to build a massive space elevator in Williamsburg! This monstrosity, completely out of context with existing development in the neighborhood, will be accessible only to the wealthy, forcing thousands of average Williamsburgers from their homes and live-work spaces! Jobs the elevator will generate (operators, repairmen, astronauts) are certain to go to non-residents! Don't sit idly by and let this elevator cast its impossibly long, cold, and very narrow shadow over our homes! CALL 311 AND TELL THEM 'I JUST DON'T NEED THIS SPACE ELEVATOR!'

  41. HA! by rudy_wayne · · Score: 1

    "At no point during the conversation did I get any impression of a huckster who would sell you the Brooklyn Bridge, something that I was on the lookout for."

    Well, obviously you weren't looking very hard. All of Mr. Laine's replies are classic hucksterism. In most cases he never actually adresses an issue - just throws out irrelevant nonsense.

    1. Re:HA! by Rogerborg · · Score: 1

      He's not a complete idiot; like most cult leaders, his answers are related enough to the questions that were actually actually asked that he'll fool the gullible and the True Believers.

      --
      If you were blocking sigs, you wouldn't have to read this.
    2. Re:HA! by jojoba_oil · · Score: 1

      You, sir, suffer from standard /. syndrome. I'm sorry.

      If you had managed to keep concentration enough to even read and comprehend the fucking summary, you would see that the author was referencing his phone conversation with Mr. Laine, not the comments supposedly written by M.J.L.

  42. I'll go as far as saying scam by dbIII · · Score: 1

    More accurately, it's like asking Intel to release their trade-secret research on building 10 GHz chips, because you don't believe they're possible.

    No it's the old trick of the paranoid or the scam artist - you can't say anything or "they" will steal the invention, and you can show it to any sort of scientific or technical person because we are all conspiring together. I saw it with an eccentric artist that worked out how to tune an engine to use less fuel at idle and thought it would work the same way under load (he went to the media but was very reluctant to let an engineer look at it because it was so simple there must be a global oil company conspiracy suppressing it), and I saw it with the Dr Horvath hydrogen car scam (he didn't want anyone to get close enough to see the hydrogen cylinder strapped underneath when the thing was supposed to run on water). I'll go so far to say the comments these space elevator people are making place them clearly in that catagory.

    In the good old American tradition it's a wildcat mine salted with a bit of carbon fibre technology from somewhere else - if someone buys them out to get their developments they find it disappointing.

  43. Re:It was doomed to failure by dbIII · · Score: 1

    You speak of Federal funding. ... China is spending more on space these days,

    They execute confidence tricksters in China.

  44. Re:As a general rule of thumb by butlerdi · · Score: 1

    Been to Shanghai, Hong Kong ? They are no longer a backward agrarian culture but have become a competitive culture. The problems everyone seems intent to harp on about were also indicative of the UK and the US but a few years ago years ago. They will also be about 1/3 of the worlds population soon.....

    --
    "If the King's English was good enough for Jesus, it's good enough for me!" -- "Ma" Ferguson, Governor of Texas (circa
  45. Yes, Laine seems on the level by UtilityFog · · Score: 1
    I met Laine a couple of years ago at the International Space Development Conference. I put a number of possible objections to him and he had reasonable answers for them. I think that if there were a billion-dollar project that a shyhook could be built using his scheme -- I agree that his major problem is capital. His neat idea, the ribbon-building robots, are as much an innovation as the mission architecture of the Apollo project with lunar module and orbital rendezvous instead of landing the giant winged rocket on the Moon as in all the 50s sf.

    That said, I doubt the skyhook is a good mode for space entry. It's slow, it DOESN'T give entry to LEO (where you're below the van Allen belts and can live), and it's incompatible with satellites. Given the nanomaterials, a space launch tower is a much more viable development path.

    1. Re:Yes, Laine seems on the level by Invidious · · Score: 1

      ...And that being said, the development and implementation of a skyhook is necessary for large-scale lage scale space facilities, both for their construction and getting the materials to 'em. Once you have a skyhook and some additional infrastructure, building a true spaceship -- one which isn't meant to land, ever -- is much simpler. Getting things to LEO from geosynchronous orbit would require comparatively tiny amounts of propellant. Also, since, ideally, the counterweight is slightly -past- geosynchronous orbit, if you simply threw a tennis ball while standing on the side of the counterweight antipodal to earth at the right time, it would wind up on the moon. Eventually.

      Now, as far as the Van Allen belt goes, I'm unconvinced that it's quite as much of a problem as people make it out to be. The particles which make up the VEB are charged particles, pretty much, so if you have sufficient power, you can actively shield against them using magnetic fields or electrostatic charges of sufficient strength.

  46. That kid... by *weasel · · Score: 2, Funny

    That kid, is back on the space escalator!
    I hope his pants get caught and a bloodbath ensues.

    --
    // "Can't clowns and pirates just -try- to get along?"
    1. Re:That kid... by Skrapion · · Score: 1

      That's sort of a harsh lesson, don't you think?

      --
      The details are trivial and useless; The reasons, as always, purely human ones.
    2. Re:That kid... by StikyPad · · Score: 1

      If you can't escape from your caught pants by the end of a month-long ride on the space escalator, your near-term demise was probably inevitable anyway.

  47. Re:I don't think Liftport will work and here's why by Rogerborg · · Score: 1

    Bingo. People on the success path don't come across as whiny and aggrieved, and are far too busy to care about a bunch of nerds bitching about them online. I doubt he's really that bothered though; he's just whoring for more investors.

    --
    If you were blocking sigs, you wouldn't have to read this.
  48. Re:Alternatives by CastrTroy · · Score: 1

    Well, assuming the escalator is angled at 45 degress, and it goes in a straight line (I've never seen a spiral escalator), and you wanted to get into geostationary orbit, at 35,786 KM, you would have to build an escalator that wrapped most of the way around the earth. Definitely not a good idea.

    --

    Anthropic principle: We see the universe the way it is because if it were different we would not be here to see it.
  49. Re:I don't think Liftport will work and here's why by Anonymous Coward · · Score: 0

    Ding ding ding! I "worked" for him as well, on yellowwweb and Teknology-Laine LLC. Michael is a nice guy, well-educated and fairly charismatic. However, he is not good with direction. His projects drift with the wind and he simply doesn't have the base for a successful venture. he was promising everyone payment in stock, someday, someway. Yeah, that turned out well...

    We had a motley collection of drifters there who wandered in and out while Michael tried to find some way to make it all happen. Unless a LOT of things have changed since the 97-98 timeframe, I don't see it happening. Wrong leadership, wrong technology, wrong venture.

  50. What's Wrong With Us by NReitzel · · Score: 1

    A space elevator is a Hard Project. I wonder that we have become a nation of Harvard MBA's, looking forward to payoff in the next couple of quarters, with a business plan that must not contain "we don't know yet."

    Any project really worth doing is worth spending the time it takes to accomplish it. And any project worth doing is going to have setbacks, assumptions that were made that were wrong in the beginning. Does anyone here think that the Atlantic Clipper ships happened because a beancounter looked at a rowboat and said, "Let's make it bigger."

    Let me say it again: A space elevator is a Hard Project. We don't have the technology, we may not even have the science at this point. Half a century ago, a very successful man said, "We can Learn what we Do Not Know." That man was Mao, and his visions singlehandedly changed the face of the planet. So, I for one, will put my money where my mouth is. LiftPort is attempting something that has never been done, and all of us have been or worked at places where "We've never done that," is considered a good reason not to try.

    Even if LiftPort fails, they will have added to the body of knowledge. That alone is worth the effort.

    And if you can't see that point, let me kindly suggest that you consider investing in a high return sub-prime mortgage fund. That, at least, you can understand.

    --

    Don't take life too seriously; it isn't permanent.

    1. Re:What's Wrong With Us by TheRaven64 · · Score: 1
      It may be a hard project, but you don't need to be an MBA to see that, if you can do it, the pay-off will be huge. How much is spent every year on satellite launches? If you had a space elevator, you could undercut every single one of your competitors by 50% and still make a huge profit, plus the barrier to entry would be so high that you'd be sure of a monopoly for a long time. Beyond that, there're the industrial applications. A lot of materials can be manufactured in free fall to higher tolerances than on the ground. It's not economically feasible right now, but it would be with a cheap way of getting materials to and from orbit. Want a monopoly on exotic construction materials for a few decades?

      The question is whether LiftPort are the people who can pull it off, not whether it's worth doing.

      --
      I am TheRaven on Soylent News
    2. Re:What's Wrong With Us by DerekLyons · · Score: 1

      Does anyone here think that the Atlantic Clipper ships happened because a beancounter looked at a rowboat and said, "Let's make it bigger."

      I wouldn't peg it as an unlikely scenario - as a clipper represented the ability to make a much larger profit in a shorter time. This is a scenario beancounters have wetdreams over.
    3. Re:What's Wrong With Us by commanderfoxtrot · · Score: 1

      How about the Project HARP idea?

      Much cheaper and they made some good achievements before being stopped.

      http://blog.grcm.net/2007/07/lifting-satellites-sp ace-elevators-or.html

      --
      http://blog.grcm.net/
  51. nitpick by Spazmania · · Score: 1

    If you started designing a computer program around the computers available at the beginning of the design process, or designed the program on your prediction of the computers available at the end of the development process, the latter would be the better product - suited to the technology available at the time the consumers were ready to use it.

    I hate to nitpick, but that's not so. Indeed, that's a large part of what killed the Ultima series of games. The final two were targeted to systems that would only just be on the market when the games were released... and even then those computers were barely adequate. Most folks decided not to upgrade just for those games and by the time they did upgrade the games were stale.

    Worse, because the developers didn't have access to the kind of systems on which the game would actually be played, they weren't able to adequately test for either bugs or playability. This led to design errors that weren't noticed until it was far too late to fix them.

    Engineering systems to the existing state of the art has the benefit that you can prototype and test the designs immediately and find out if they work. You can't do that when engineering against a theoretical construct; you have to guess and when you guess you often guess wrong.

    --
    Moderating "-1, Disagree" is simple censorship. Have the guts to post your opinion.
  52. hmmm.... by jefu · · Score: 1

    The notion of tactical nuclear weapons against Iran seems to be (um) not-unpopular among presidential candidates. The only question is how to spin a space elevator so it sounds like a similar threat. But I'm sure our politicians can manage that as they've done similar things in the past. And it would surely be cheaper (short run at least) to destroy another nations elevator (/other competitive space lift facility) than to do it ourselves.

    1. Re:hmmm.... by dintech · · Score: 1

      The Chinese would have Russian/Iranian/North Korean (military) support after an action like that. There's no way Americans would win that war. What a mess that would be...

  53. Why we're pessimistic Re:Increased Pessimism by commuter676 · · Score: 1

    In 1984, a man named Joseph Newman claimed to have invented a perpetual energy machine.
    I can't remember the exact mechanical setup he had, but his pitch went something like this.
    He used some D Cell batteries connected in series to power a small motor,
    at a very slow rate, respectively speaking, the batteries were switched in would provide
    a very short pulse of energy.
    Hi device had some sort of arms that would maintain the energy generated by the motor spinning
    through the use of weighted arms that would retain the momentum due to being weighted.
    I believe he had magnets attached to the end of the arms, and they would in turn pass coils
    or something like that, and generate pulses of energy.

    He went through the process of measuring the output pulse of energy, and claiming that
    only a narrow, very short pulse of energy from the batteries ,created a certain measured
    amount of energy.
    And went further to claim that because the energy put into the system only used
    store bought batteries that it was only a small amount of energy.
    He had never shown any correct and full measurements of the input energy to observers.
    But when the input power from the D Cells was measured, the power from the batteries
    was a few times greater than the energy that his machine put out.
    Even though it was narrow, the Current spike from the batteries was immense.

    MY POINT IS
    THE REPORTERS AND NON-TECHNICAL CROWDS WENT "OOOH!" AND "AAAAH!", BECAUSE
    HE WAS A GOOD SALES MAN, AND FED THE RIGHT INFORMATION TO THE MINDLESS SHEEP
    WHO WOULD FOLLOW ANYONE WITH A GOOD ACT.
    THE GUY WHO CAME UP WITH THIS SPACE ELEVATOR IS ANOTHER GOOD SALES PERSON
    WHO WOULD PROBABLY CLAIM TO PUT A CHICKEN IN EVERY POT, GIVEN THE RIGHT CIRCUMSTANCES.

    AND AS FOR THOSE WHO CLAIM THAT THE ENGINEERS ARE TOO CAUTIOUS, WE HAVE TO BE
    TO KEEP THE SHEEP FROM HURTING THEMSELVES, BECAUSE THEIR TOO STUPID TO KNOW ANY
    BETTER.

    When anyone invests in anything, money wise, a person familiar with that field is
    consulted. Investing money see an investment broker, or a good account.

    If your going to invest time in an engineering project do a feasibility study.
    i.e. consult an engineer, and he'll tell you if you have a good idea, or are sheep
    stupidly following an idiot, or worse yet a lemming jumping off a cliff just like the rest
    of the stupid little amnimals.

    signed a pessimistic,
    no wait that's not right
    signed a realistic engineer

    1. Re:Why we're pessimistic Re:Increased Pessimism by Anonymous Coward · · Score: 0

      THEIR TOO STUPID TO KNOW ANY BETTER.



      Pot, meet kettle. If you're going to call people stupid, at least learn how to spell first.
    2. Re:Why we're pessimistic Re:Increased Pessimism by BytePusher · · Score: 1

      Hi, I'm an engineer too and I like to think of myself as realistic. One of the engineering methods I learned in school was something like, "guess and check." You make a guess, see how close you were then go from there. Mr. Lane has a great idea. He has a goal which seems unachievable, but along the way he has a series of seemingly achievable goals of which any of them would be profitable. His business plan and schedule is his hypothesis, his guess, and he's going to prove or disprove it and modify his plan accordingly. Maybe, probably, he won't build a space elevator, but along the way he may make some serious breakthroughs and I suspect will become rich in the process. Why do I think he'll become rich? Because he's doing the very thing you and I are afraid to do, taking risks, being optimistic. Some people might call it "aiming high" or having "fire in the belly."

                It seems there are always people willing to try to hold back innovators and risk takers. I say let them stick their neck out if it makes them happy. Maybe they'll lose their head in the process, but maybe not. I'm not going to nay say someone's dream for... honestly I can't even begin to formulate a motive for nay sayers except, perhaps, jealousy. Anyway, just my 2 cents. Keep on going Mr. Lane!

    3. Re:Why we're pessimistic Re:Increased Pessimism by drinkypoo · · Score: 1
      1. Typing in all caps doesn't make people more receptive to your message. It makes you look like a fucking idiot. (I don't know if you are, but I suspect you are, because...)
      2. Many respected engineers believe in the concept of the space elevator.

      In fact, you could read this wired article which contains citations from people who you could consider listening to - because they are themselves intelligent, and in turn also have engineers giving them their opinions... "Technically it's feasible," said Robert Cassanova, director of the NASA Institute for Advanced Concepts. "There's nothing wrong with the physics." Or David Raitt, senior technology transfer officer for the European Space Agency, believes the question is not whether to build a space elevator, but only how long it will take. Or of course Bill Rever, senior manager of business development for BP Solar, has been in contact with Edwards and said the space-elevator concept is "very promising." "I was very impressed with the level of detail in their analysis of potential engineering problems, and their proposed solutions," Rever said. "They've done a lot of homework, and it really shows. It's far beyond the level of a bunch of guys with an idea. It's definitely at the level of actual engineering to make it happen."

      People a lot more influential than you are have gone to their teams of engineers who have told them it is feasible. Some of those people are almost certainly smarter than you are.

      Perhaps you could provide a link to a study that says a space elevator is not viable from a physics standpoint?

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    4. Re:Why we're pessimistic Re:Increased Pessimism by Anonymous Coward · · Score: 0

      BECAUSE THEIR TOO STUPID TO KNOW ANY BETTER.
      Seriously, don't bring a knife to a gunfight. If you have actual arguments to disprove this guy, be so kind as to use actual English.

    5. Re:Why we're pessimistic Re:Increased Pessimism by Anonymous Coward · · Score: 0

      Okay, "a pessimistic" (huh?). If you had been alive at the time, I guess you would have been one of those who didn't believe we could land a man on the moon ever and certainly not within a decade of it being publicly proclaimed. Not that you would have been alone. Even those charged with making it happen didn't truly believe it could be done that soon. We knew the basic concepts but we didn't have all the necessary technology and materials! Low and behold we did do it and within the decade and with computers that would hardly rank against the orginal Atari. How was it done? With a challenge, national pride, incredible amounts of r & d by many different groups and a HELL of a lot of money!

      Think nothing like that could happen again? Well, that was at least the second time it happened in a thirty year period. In the early 40's an atom bomb was just as inconceivable, if not more so. Few scientists even had a clue had to begin to make such a bomb feasible. Not long after, World War II was effectively ended by just such a bomb (for better or worse). The same issues made that project possible as well, except it was done mostly in secret.

      Michael Laine and his LiftPort Group are trying to accompolish the same thing. The difference is they don't have the military or governmental funding and they are looking at a much more realistic time frame given their civilan/commercial aspect. His ideas of outgrowth technologies are based on realistic occurances seen from the outgrowth of the moon missions r & d. Where do you think heart pacemakers, infrared thermometers and even all those Nerf playthings originated from? What's wrong with anyone attempting to jumpstart inovation with long term goals in mind?

      I don't have a slashdot account but I'm not an anonymous coward.

      Lorraine Glynn
      Atlanta, GA

  54. Objection IGNORED: Material viability... by nweaver · · Score: 1

    You need materials which are NEARLY TWO ORDERS OF MAGNITUDE stronger than what we can build today...

    And if you got just 50% stronger, let alone 5000% stronger, you would have a hugely viable company just making cables and fibers.

    IBM etc all predicate their work on a reasonable roadmap of the future. Any roadmap which says "And then a miracle occures, and we are able to improve things by 50x when previously we've only been able to improve things by 1.01x" is just not a viable roadmap.

    --
    Test your net with Netalyzr
    1. Re:Objection IGNORED: Material viability... by drinkypoo · · Score: 1

      You need materials which are NEARLY TWO ORDERS OF MAGNITUDE stronger than what we can build today...

      It is alleged that the spectra fiber is capable of doing the job, and besides, carbon nanotubes are able to do the job today, it's just not economically feasible to produce them in sufficient quantity; partly because making them at any length is expensive, and partly because making them in the necessary lengths is even more expensive.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
  55. Re:Alternatives by Anonymous Coward · · Score: 0

    There are spiral escalators, just so you know.

  56. Space elevators interfere with lower orbits by msmithma · · Score: 1

    I remember a serious flaw in the space elevator my theoretical mechanics professor talked about. This concern is never addressed in most accounts of space elevator proposals, why is that? Over time the space elevator ribbon will cross all orbits below the geosynchronous "counter weight" effectively closing any stable lower orbit. Now if we are willing to make that trade-off then my issue is moot and that seems possible as the only examples of value for low earth orbit I can think of are high resolution satellite imagery.

    --
    Mart!n Smith-Martinez http://www.msmithma.name
    1. Re:Space elevators interfere with lower orbits by drinkypoo · · Score: 1

      Over time the space elevator ribbon will cross all orbits below the geosynchronous "counter weight" effectively closing any stable lower orbit.

      In Kim Stanley Robinson's Mars trilogy, the mars-based space elevator was under oscillation so that it would dodge one natural satellite (the other was made into the station for the cable.)

      Just food for thought, it's a horribly complex thing to do.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    2. Re:Space elevators interfere with lower orbits by rahvin112 · · Score: 1

      If lower orbits are out, so are almost every military satellite, which includes GPS, and it's international variants. In addition you can kiss the Iridium System goodbye. And I'm sure there are hundreds of other satellites in low earth orbit that people, countries and the militarys of the world find are 100% necessary.

      This alone is a death kneel for the entire concept. The 100's of satellites in low earth orbit don't have the booster fuel to be dodging a big flying guillotine in space, even if it only comes around every 5 years.

    3. Re:Space elevators interfere with lower orbits by PermanentMarker · · Score: 1

      just pull the rope and duck

      --
      I know you're out there. I can feel you now. I know that you're afraid. You're afraid of us. You're afraid of change.
  57. Not why... sorry pal by checkup21 · · Score: 1

    it has been explained over and over, that space exploration or space colonization (or whatever) is *not* helping us with an overcrowded earth. You may colonize new planets, but you cannot move significant amounts of ppl from one planet to another. It is simply not possible. You would have to build about (raw estimate) one "seat" in 3-5 seconds (don't nail me on that, but it's about this number) just to stop the population growth. Even if regular deaths would "support" you in your task, you never can build this fast.

    Rather build condoms or such for your task. Sorry pal.

    1. Re:Not why... sorry pal by Grishnakh · · Score: 1

      Rather build condoms or such for your task. Sorry pal.

      Sorry, but the Catholic Church won't allow this. We're supposed to be breeding incessantly because it says so in the bible.

  58. Spin by Frodo2002 · · Score: 1

    I read all the questions and the Liftport replies. Nothing but spin. Specific practical questions like "how are you going to weave 1 cm long nano tubes into a strong thread that doesn't pull apart?" were answered with vague generalizations that had almost nothing to do with the question being asked. Sorry, but the underlying message is clear: "very little chance of a space elevator in our lifetimes"

    1. Re:Spin by PermanentMarker · · Score: 1

      hmm i think personaly that the answer to this problem should still be invented.
      But within our life times

      Most likely some chemic proces wil be designed to create a continous long nanotubes (not 1 cm but a 1 km).
      The reason why this is likely to happen that is it would be cheaper then steal (carbon is cheaper).
      And so lots of industries who use (depend on) rope these days would buy super strength rope.
      Allready there is a market for that, the industry is driven to find stronger materials all the time..
      And also our knowledge of nano tubes is only increasing more and more.

      So i would not be supriced if it would be invented in the next month or next year or 10 year.
      I would rather be supriced if it would take longer then 10 years.

      --
      I know you're out there. I can feel you now. I know that you're afraid. You're afraid of us. You're afraid of change.
  59. The real reason why it will fail by CustomDesigned · · Score: 1
    Tower of Babel II

    Genesis 11

    Then they said, "Come, let us build ourselves a city and a tower with its top in the heavens, and let us make a name for ourselves, lest we be dispersed over the face of the whole earth." 5 And the Lord came down to see the city and the tower, which the children of man had built. 6 And the Lord said, "Behold, they are one people, and they have all one language, and this is only the beginning of what they will do. And nothing that they propose to do will now be impossible for them. 7 Come, let us go down and there confuse their language, so that they may not understand one another's speech." 8 So the Lord dispersed them from there over the face of all the earth, and they left off building the city.

    I mostly bring this up for fun, but notice the line, "this is only the beginning of what they will do. And nothing that they propose to do will now be impossible for them." Sometimes our lack of technical success is a blessing in disguise because we don't often have the moral strength to use tech for good rather than evil.

    1. Re:The real reason why it will fail by Firethorn · · Score: 1

      The bible isn't the first thing that comes to mind when I'm considering stuff. While familiar with this piece, it hadn't come to mind when I proposed this.

      I'm sorry, but this makes god out to be a d*ck. Yes, I know they were wicked and all that, but it sounds like they had themselves together. Not to mention that it also has a scary number of parallels to today.

      --
      I don't read AC A human right
  60. Re:Alternatives by Anonymous Coward · · Score: 0

    you would have to build an escalator that wrapped most of the way around the earth. Definitely not a good idea.
    It is not a good idea to see the world?
  61. Space guns don't work for us because ... by CiRu5 · · Score: 1

    ... our squishy bodies don't like thousands of g's ... could work for cargo thought. As a side note, space guns have some really cool history associated with them, especially Professor Bull. He ended up being assasinated by the mossad for the work he was doing with Iraq, or so I heard.

    --
    "Some of the worst mistakes in my life have been haircuts." - Jim Morrison
    1. Re:Space guns don't work for us because ... by Organic+User · · Score: 1

      No one knows who assassinated him nor has anyone taken claim. Many are propagating the Mossad as the candidate for either anti-Semitic reasons or pro-Semitic reasons. The pro-Semitic agenda would be to install fear into enemies. The anti-Semitic agenda would be the Jews are behind everything... blah blah blah... However, most people who do not have an agenda on the matter consider VEVAK (Iran) or the Mossad or the CIA to be the most likely candidates. My gut tells me it was most likely an independent or VEVAK.

    2. Re:Space guns don't work for us because ... by Tofystedeth · · Score: 1

      What about a really really long gun? To allow for slower acceleration?

      --
      "A little knowledge is a dangerous thing. Drink deeply or not at all."
    3. Re:Space guns don't work for us because ... by CiRu5 · · Score: 1

      Cool, thanks for the input, it really is kind of a neat story ... one of my former professors who worked with him at the University of Toronto told me a bunch of stories about Prof. Bull and there are some interesting points regarding his death. - Sometime before he was killed he had come home to find all of his things upside down ... not trashed just moved, thought to be a messege of some sort. - He was shot many times (12 I think) in the back outside of the door to his appartment in Brussels - He always carries large sums of money and he was found with $20k (or something like that) on him at the time of his death ... ergo, not a robbery. Oh yeah and at the time he was developing ballistic missile re-entry shrouds for Sadaam (a US ally at the time) and in return Sadaam was providing funding and a site for his life long dream, a "Space Gun"

      --
      "Some of the worst mistakes in my life have been haircuts." - Jim Morrison
    4. Re:Space guns don't work for us because ... by CiRu5 · · Score: 1

      well you're gonna need a velocity of at least 7800m/s (no atmosphere) and for the real world more like 10000m/s ... now I refer you to the kinematic equation - Vf^2 = Vi^2 + 2*a*d .... with an a = 10m/s^2 that's a gun about 5000km long!

      Plus that's not really a gun anymore now is it ... the whole point of a gun is that it accelerates quickly, that and you'd get very hot from atmospheric friction, think shuttle re-entry.

      Yet for acceleration insensitive cargo with a traditional style space gun it's not impossible.

      --
      "Some of the worst mistakes in my life have been haircuts." - Jim Morrison
    5. Re:Space guns don't work for us because ... by Rich0 · · Score: 1

      No sense backing off too much on the acceleration - as soon as you hit the air you're going to probably have 100Gs of deceleration for a brief time until you're out of the lower atmosphere. Even a very streamlined vehicle hitting 1ATM air at orbital velocity is going to have MASSIVE drag. You'd need a massive heat shield as well (which probably would be gone (and no longer needed) a second into flight).

  62. He's got the charisma in person by Anonymous Coward · · Score: 0

    > he/she needs to be charismatic in person and in presenting the idea to other people.

    I met the guy at DragonCon a couple years ago. I watched his presentation. I had lunch with the guy. When he's in front of a room, he owns it. He's got exactly the personal vibe you need to sell the idea.

    I'm not an astrophysicist, so I can't evaluate the project from that end. And maybe in a rigorous print interview he's not so good. But for building enthusiasm, face to face (and, presumably, raising money), he's your guy.

  63. You have a profound misunderstanding of finance. by sean.peters · · Score: 1

    You my friend, are totally missing the point. The actual building of a space elevator might be insanely expensive, but once it's there, getting things into space will be insanely cheap

    You're right about one thing - the actual building of the space elevator would be insanely expensive. So I'm baffled as to why you think that actually getting things into space using one would be insanely cheap. How do you think they mean to fund construction? Being a slashdotter, you're familiar with the general steps:

    1. Borrow a huge amount of money
    2. Use money to build space elevator, while paying insane interest rates because of the risk involved
    3. ???
    4. Profit!

    In this case, the missing ??? is "charge absolutely enormous fees to use the space elevator, so we can pay off our debts". Trouble is, proven rocket technology is already in place for only sorta-enormous fees. Meaning it's highly likely you'll never get past the "borrow enormous sums of money" step. You can substitute "attract investors" for "borrow money" if you like, but it doesn't change the overall picture very much. Investors will be looking for a huge payoff to compensate them for their huge risk, and it's doubtful that will ever happen.

  64. Sorry, wrong answer... by nweaver · · Score: 1

    Look at the results of the Elevator 2010 competition:

    They are getting within 20% of the theoretical limit of the fibers, and that is 50x less than where they need to be.

    If you could make a carbon nanotube rope which is even just 1 inch long and which shows an appreciable amount of the raw nanotube strength, you can get your 10M in VC funding in, ohh, about 2 seconds flat.

    --
    Test your net with Netalyzr
    1. Re:Sorry, wrong answer... by PermanentMarker · · Score: 1

      Those where the 2005 results the 2006 results where nearly there one team allready claimed it.
      I'm looking forward to the 2007 result as this is a yearly even chek out here

      http://www.elevator2010.org/competition.html

      So not that beaten after all

      --
      I know you're out there. I can feel you now. I know that you're afraid. You're afraid of us. You're afraid of change.
  65. I get a kick out of these constant efforts... by sean.peters · · Score: 1

    ... to justify space travel. A couple of things:

    There's thousands of Near Earth Asteroids which contain hundreds of times more metal than the entire crust of the Earth is believed to hold.

    Yes, and 99% of it is iron and nickel, which are already present on Earth in great abundance. Meaning we can extract it right here much, much cheaper than going into space to get it. The idea that the space elevator is somehow going to make getting to orbit really cheap is, well, not very realistic, as has been pointed out elsewhere in the thread. There are numerous other problems involved in space mining; such as the need to deliver entire factories, plus the miners and support people needed to man them, to the asteroid belt; the need to get your mined metals back to the Earth; etc.

    Also, you talk talk about coal & oil in addition to "precious metals", but coal & oil are not present in space. Nor is any other energy source in abundance. Sure, there's solar power, but you don't need the space elevator to get that.

    Finally, these are our choices? Either mine the asteroids or kill off our surplus population? I think it's entirely reasonable that we could do neither. If we applied ourselves, we could get our population under control without having to forcibly sterilize or murder anyone. And with proper attention to recycling, etc, we could curb our appetite for resources. And we could do all that a whole lot cheaper than building a space elevator, deep space mining facilities, etc.

    The bottom line: getting resources from space is not economically feasible, and won't be for the foreseeable future. This is not to say that I think space exploration is a bad idea - I think the scientific value alone justifies the expense of that. But it's not going to be a paying proposition anytime soon.

    1. Re:I get a kick out of these constant efforts... by Anonymous Coward · · Score: 0

      Also, you talk talk about coal & oil in addition to "precious metals", but coal & oil are not present in space. Nor is any other energy source in abundance. Sure, there's solar power, but you don't need the space elevator to get that.

      Actually, you're wrong on that front. The outer planets are abundant sources of hydrocarbons and hydrogen. (Not that I think that we'd wind up shipping methane back to earth...) However, certain isotopes which are used in fusion processes are quite common on, say, the moon. Additionally, because there's no atmospehre in the way, solar panels are exposed to more light per unit of surface area, and you could place them in areas that will receive sun 24 hours a day. Of course, power transmission's a problem, still.

      In addition, if we manage to achieve some kind of stable infrastructure in space, keep in mind that we would have access to certain materials (particularly nickel and iron) at MUCH higher purity levels than you could get out of the ground. Nowadays, pretty much all of the readily-available very-high-quality ore has been used up, and what's there requires massive amounts of power to process into a useable form. (The smelting industry is -extremely- dependant on coal, or rather, coal 'charcoal', also called coke.) A nickel-iron asteroid is as close to pure metal as you can get in a natural environment.

      With a large enough solar farm, or a moderately sized nuclear reactor, it'd be pretty simple to extract aluminum and, IIRC, titanium, from the lunar regolith, along with high-quality silicon as a by-product. Shipping intert materials from the moon to the earth is pretty simple, too, with the right infrastructure.

      This doesn't of course mean that it's cheaper now, or in the near future, to do these things -- but it's a consideration. People who urge the exploitation of space aren't thinking ten years down the line, they're thinking a thousand years down the line or further - hell, eventually the Sun will bloat up and consume the Earth. There's a very, very nasty asteroid called Apophis which is going to have a couple of near-misses (we pray!) in 2012 and then later, again, in a decade or so, IIRC -- it's the second pass that people're worried about. At any point, the Eart could be rendered unfit for human habitation by one of these objects, unless we're ready for it. The exploitation of space -- even just local space -- is imperetive; it's necessary to guarantee the survival of the species.

  66. The difference being... by sean.peters · · Score: 1

    ... that the rails were manufactured in relatively short sections and then assembled (welded) in place. The space elevator would have to be MANUFACTURED in one continuous 36,000 km piece, without a single defect.

    1. Re:The difference being... by smellsofbikes · · Score: 1

      My understanding of the space cable technology was that they were trying to do essentially exactly the same thing as the railroad: make strands a few meters long, then join them.

      --
      Nostalgia's not what it used to be.
    2. Re:The difference being... by moosesocks · · Score: 1

      Maybe, or maybe not. The cable could be manufactured in sections, launched up into space, and then be joined together while in orbit, as it's being lowered down to earth. It actually wouldn't be all that different from a continuously welded railtrack.

      --
      -- If you try to fail and succeed, which have you done? - Uli's moose
  67. Paper studies by apsmith · · Score: 1

    None of this is hidden. Laine worked with Brad Edwards on "HighLift Systems" (google it for some background) which did a NASA-sponsored study of space elevator engineering with nanotubes, but the basic engineering isn't that different for other materials, you just have to taper the ribbon more aggressively. You could get a copy of Liftport's book - of course I'm slightly biased since I wrote one of the chapters. It's a mix of fiction (some really good, some not so good) and essays on the basic engineering challenges. "Liftport: Opening Space to Everyone", you can find it in their "store" or Amazon, etc.

    --

    Energy: time to change the picture.

  68. Safety factor of 2? by apsmith · · Score: 1

    Up to you if you need it, but that's not the lower bound on building an elevator with spectra. The lower bound is the safety-factor-1 number, which with your values is 95 billion kg, or 95 million metric tons. That's well within plastics manufacturing capacity of today, though a lot more than the current annual market for spectra itself

    The problem with this sort of number is it takes tens of millions of trips to lift itself up, so the bootstrapping technique that is normally assumed just doesn't help. So you could build it with spectra in principle, but what would be the point? Having an elevator with a mass ratio down in the thousands rather than the millions seems to be essential, and that means materials with at least 20 GPa strength. We're obviously not there yet.

    --

    Energy: time to change the picture.

    1. Re:Safety factor of 2? by Rei · · Score: 1

      Within plastics *manufacturing* capacity? You're talking about *launching* something like this. Launching a 95 billion kilogram device with no ability to withstand damage or defects (that's what a safety factor of 1 means) for a miniscule payload.

      I think you'll agree that this is beyond the realm of realism.

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    2. Re:Safety factor of 2? by apsmith · · Score: 1

      Well, the idea of bootstrapping is that you can start with a device in orbit of, say, 1/10th the final mass, and then it can build itself from there by pulling up pieces starting at 1/10th the final payload mass. That's reasonable with a mass ratio of 10's to 100's, maybe even 1000. But totally out of the ballpark for ratios in the millions, as I was saying.

      But that's pretty much what Laine was saying too - an elevator right now is "difficult", but not "impossible", which was the question he was responding to there. There are materials that you could build it with today, but it would cost you trillions of dollars, at least, for very limited capacity. So it wouldn't serve any useful purpose, but it wouldn't be impossible.

      --

      Energy: time to change the picture.

    3. Re:Safety factor of 2? by Allador · · Score: 1

      Actually, at least by my read of your own statement, that makes this not a matter of fundamental science, but one of engineering & economics.

      Now it may not be economically practical to make one now, or in the future, but it seems based on these 'back of the cocktail napkin' numbers that its possible. It's just not practical.

      And hell, deciding to do something when not all the fundamental research pieces were there has been done. The inital space race to the moon required (as I understand it at least, cant cite a source off the top of my head) the invention of a number of things from whole cloth that had not existed before.

      Now clearly, that made the race to the moon an 'engineering & economics' problem as well.

      But I havent seen anything yet that makes a space elevator fundamentally impossible. It may or may not be impractical today (because of engineering & economic limitations) but it appears to be possible.

      And its not like they're tricking anyone into investing in them. And its not like they acquired more than a paltry seed fund of investment anyway, other than from the founders themselves.

    4. Re:Safety factor of 2? by Rei · · Score: 1

      Hey, if you think that it'll *ever* be economical to launch a 95 billion kilogram elevator that carries a couple thousand kilos of cargo up at a time (1/50 millionth the mass) *and* will break when the first micrometeorite hits (if not before then), then I have some swampland in ... actually, heck, if you believe that, I have some stock in LiftPort to sell ya ;)

      A mere safety factor of 2 -- not very much -- means that the real mass is as much as the entire atmosphere, and ten times the mass of all of Earth's surface freshwater.

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
  69. Re:It was doomed to failure by HoldenCaulfield · · Score: 1

    I find it interesting that most of the responses to your post seem to suggest the US would stop/hinder other space elevator efforts, whereas I read your post to mean that it would be a repeat of the space race. In other words, the US would be spurred on by others technical achievements, and would invest the resources to accelerate its efforts, so that it would be the first nation to have a functional space elevator.

  70. Why? - Cheap transportation by geek2k5 · · Score: 1

    Just because it can be done, doesn't mean you have to do it... There are alot more important and much more useful projects money could be put into IMHO!

    With a space elevator you could get items to and from orbit for a fraction of the price of today's rocket based transport. While the startup costs are high, the long term price per pound would be low.

    What you do with that price advantage could help mankind and save a lot of money on useful projects. Plus there would be other advantages to a space elevator.

    Imagine putting weather, telecomm, and other satellites into orbit without having to build them to withstand the high G forces of rocket based launch systems. These satellites wouldn't have to conform to the volumetric limits of the rocket based systems so they could be made with an eye to optimizing their performance as opposed to fitting into a smallish box. Better still, they could be tested in their 'native' environment for several weeks before being 'shoved' into their final orbits with low G propulsion systems.

    Also imagine being able to put manufacturing equipment into space, with raw materials, and making a whole array of high quality products that can only be made under 'weightless' conditions. Crystals for electronics and pharmaceuticals are items that have long been considered potential product lines IF shipping costs were low. It could be that a vaccine for AIDS or malaria might be manufactured in space in quantities that make it cost effective. That should be important and useful. But without cheap transportation, costs will be too high.

    In some science fiction scenarios, the space elevator could generate electricity, reducing the need for fossil fuels. If this is true, Earth benefits. (I seem to recall that the space shuttle did an experiment with a tether to test the electrical generation hypothesis. But there is a book by David Gerrold that popularizes it.)

    Of course, there WILL be the entertainment factor. If a space elevator provides a cheap way to orbit, people will want to go there just because they can. Other people, like Disney, Six Flags, Trump, will see this as a business opportunity and create the amusement parks, gambling casinos and related facilities. Thousands of people will have jobs that are literally out of this world.

    On a more important note, despite the dangers a space elevator could pose should it fail, it could also be used to save life on Earth. Building and launching a giant fleet of space ships to deflect an asteroid or comet would be much easier to do from a space elevator. (The technology may not exist now, but we're close in many areas.)

    The space elevator itself is just a means to these and other ends. Without it, other important and useful projects would be impossible.

  71. Re:It was doomed to failure by Puff+of+Logic · · Score: 1

    I find it interesting that most of the responses to your post seem to suggest the US would stop/hinder other space elevator efforts, whereas I read your post to mean that it would be a repeat of the space race. In fairness, I think that both options are a defensible supposition, but the former would almost certainly involve warfare on the scale we haven't seen since the last World War and thus is rather less so. Any nation (or amalgamation of nations effectively operating as a single entity, such as the EU) with sufficient resources and technology to attempt a space-elevator would necessarily be a first-world power. An attempt by the US to stop/hinder the activities of such a power would be an undertaking vastly more difficult and dangerous than bombing/threatening/negotiating a second- or third-world nation into submission.

    Of course, any world-power that possessed a space-elevator would have a strategic and economic advantage of staggering magnitude over any nations that did not. This point underlies my assertion that the US government could not, in good conscience, permit another power exclusive possession of such a resource. Thus, the US would be faced with three options: another space-race, a partnership in the building of the elevator, or military/economic actions to prevent the building of the elevator.

    Despite my extreme dislike for the current administration, I have a lot of faith in the people of my adopted country (UK --> US) and I do indeed think that a new space-race would ensue the moment another nation began work on a space-elevator (or indeed any other appropriately advanced space technology). To be honest, I wish it would happen. A US choosing to focus its energies primarily on space would likely be a better international neighbour, inspire a new generation of science/technology/engineering students, and perhaps even give its population a healthy focus and source of pride to jolt them out of their lassitude.
    --
    P.P.S. I'm doing Science and I'm still alive.
  72. What's next, Kevin Trudeau? by Anonymous Coward · · Score: 0

    When did Slashdot become spam? This guy is a fraud, under investigation for basically running a ponzi scheme. His cover story (which is irrelavant to the actual con) is to build an elevator to the heavens. The closest he got was using the money from gullible investors to buy an office building. While it doesn't have any tenants, it does have an elevator.

    He has no research facilities, no engineers on staff (no staff really), and the closest he came to do anything remotely related to the subject was the sponsorship of a glorified LEGO competition, which Slashdot credulously covered.

    This is not his first dubius business, so I don't think he deserves the benefit of the doubt, and his history to date shows he's still just a huckster. If self promoting con artists qualify as Slashdot material, why not publish articles on the "Natural Cures 'They' Don't Want You to Know About", written by the convict con artist Kevin Trudeau? Or inform your readers on the vast sums of moneys awaiting anyone who can help the deputy minister of Nigerian tourism get to his hidden US bank accounts?

    1. Re:What's next, Kevin Trudeau? by Mr.+Foogle · · Score: 1

      The closest he got was using the money from gullible investors to buy an office building. While it doesn't have any tenants, it does have an elevator.

      Laine bought the office building years before LiftPort was founded.

      --
      Display some adaptability.
    2. Re:What's next, Kevin Trudeau? by DerekLyons · · Score: 1

      The closest he got was using the money from gullible investors to buy an office building. While it doesn't have any tenants, it does have an elevator.

      Laine bought the office building years before LiftPort was founded.

      The OP has the facts right - he just has the wrong set of gullible investors/bankers/goverment grant givers. Micheal bought the building with money from gullible investors/bankers/goverment grant givers back in the 90's when he promised everyone he was going to make Bremerton a high tech community.
    3. Re:What's next, Kevin Trudeau? by Mr.+Foogle · · Score: 1

      Apart from the building I gleaned these facts from the OP

      under investigation for basically running a ponzi scheme.

      The investigation is over. I do not think that what we were investigated for qualifies as a Ponzi scheme.

      While it doesn't have any tenants, it does have an elevator.

      The last time I checked the bulding had tenants. It has been a while since I looked, granted. It does have an elevator.

      He has no research facilities, no engineers on staff

      True, we have closed what was to be a research facility. Tom Nugent is an aerospace engineer.

      the closest he came to do anything remotely related to the subject was the sponsorship of a glorified LEGO competition

      I'm not sure what that is talking about - the FIRST Competition for high schoolers?

      --
      Display some adaptability.
    4. Re:What's next, Kevin Trudeau? by Anonymous Coward · · Score: 0

      Mr Floogle, why not spend all of your precious time BUILDING THE SPACE ELEVATOR instead of priming suckers on Slashdot?

      There is no point arguing with a professional liar, so I wont bring up the forthcoming loss the the office nearly vacant office building, the fact that you haven't done anything but "build the brand" with the money to date, or the assinine claim that the only thing keeping you from your goal is unlimited wealth (sure, then you could hire some qualified company to actually do something).

    5. Re:What's next, Kevin Trudeau? by Mr.+Foogle · · Score: 1

      There is no point arguing with a professional liar,

      Indeed - I was thinking that arguing in slashdot is like wrestling with a pig. The pig likes and both of you get muddy.

      I had been talking with Tropical Coder, who insists that Slashdot can be a reasonable forum for discussion. Perhaps he's wrong - if there is reasonable discussion here it's too much work to sift the wheat from chaff.

      --
      Display some adaptability.
  73. Re:Alternatives by drukawski · · Score: 2, Insightful

    How does a straight line wrap around anything?

  74. Shouting by geek2k5 · · Score: 1

    I tend to ignore people who resort to SHOUTING to make their point. While the Newman example is a good one, the use of shouting makes the example trivial.

    Some of the comments after the example remind me of the tale of an engineer who was also a science fiction (SF) writer. Way back in 1945, long before mankind put anything into orbit, this person wrote about having communications satellites in orbit. While such things were not technically feasible at the time, they have become a reality since then.

    That same person, in a 1978 book called "The Fountains of Paradise", proposed the space elevator. While he had to do some finagling with locations, for dramatic effect, his proposal is a lot like what Liftport is trying to do.

    Personally I would say that Arthur C. Clarke is NOT a salesman that promises a chicken in every pot. At the same time, I would say that a lot of his visions have turned into reality. (Of course, with any SF writing, a lot other visions have been left by the wayside. But that is a fact of life when dealing with SF.)

    When investing time in an engineering project, also remember to research the history of the idea as part of the feasibility study. A ten minute search on Google using "space elevator" as the search term, uncovers several articles referencing Clarke. (I speed read. Your results may vary.)

  75. Different fuel economics by geek2k5 · · Score: 1

    This alone is a death kneel for the entire concept. The 100's of satellites in low earth orbit don't have the booster fuel to be dodging a big flying guillotine in space, even if it only comes around every 5 years.

    Note that with a space elevator, you could put up satellites that have lots of extra fuel for making orbital adjustments. The lower cost of putting them into orbit would allow you to have bigger fuel tanks.


    For that matter, if you had a space elevator support fleet of ships that could help satellites make orbital adjustments, you wouldn't have to include that hardware in the original satellites. This support fleet could also be used to safely remove satellites that are obsolete or not working.

  76. Transportation subsidies by geek2k5 · · Score: 1

    Do note that other methods like roads are heavily subsidized. For example, before I got my second car, the portion of my property taxes dedicated to transportion were more than I paid out in state and Federal gas taxes.

    Remember that when voting for transportation related bond issues. Even if you don't leave your home, you may be paying for the roads.

  77. a boat? by falconwolf · · Score: 1

    WTF? As if this kite-on-steroids idea isn't daft enough to start with, they're going to attach it to a boat?

    Actually a boat, really a large floating platform, would be better to anchor a space elevator to than the ground. Whereas the ground is "unmovable" without a considerable amount of resources, a floating platform can easily move a short distance.

    Falcon
    1. Re:a boat? by Bastard+of+Subhumani · · Score: 1

      1st guy: You did make it heavy enough didn't you - at least twenty million kilos?

      2nd guy: We even added a 50% safety margin - we made it thirty million pounds.

      Pan to shot of giant boat being lifted out of the water and floating off into the distance...

      --
      Only three things are certain; death, taxes, and apocryphal quotations - Ben Franklin.
  78. Re:It was doomed to failure by dbrutus · · Score: 1

    The balance of world economic power is shifting to the East because the East isn't economically handicapping itself as much as it used to. That reduces relative dominance of the US but does not affect the US' ability to support any particular project, including a space elevator. The pie is radically growing because 2 billion people are being progressively freed of their economic bondage. That's unalloyed good news no matter where you are.

  79. Re:It was doomed to failure by dbrutus · · Score: 1

    correction: they execute confidence tricksters who have paid insufficient bribes in the PRC.

  80. missing something by falconwolf · · Score: 1

    Ok, that's great, but you're the ones making this amazing claim that you could build a space elevator today if only you had the money. Amazing claims require amazing proof. Your official road map doesn't exactly cut it.

    I must of missed something, I didn't see where he said they could build an elevator today. Instead I specifically recall he stated that they were loooking at 25 years before they got it off the ground.

    Falcon
  81. Getting our act together by geek2k5 · · Score: 1

    No, I firmly believe that we should get our act together first before venturing forth into space, and that we should not blindly believe it's gonna fix all or any of our problems!

    We really need to get our act together WHILE we venture forth into space.

    We already know about the fallacies of keeping our eggs in one basket. It would be one of the universe's biggest ironies if we held off colonizing other planets and even other solar systems because we achieved societal perfection and then got wiped out due to an asteroid, comet or nearby novae.

    Do note that many of the problems we have today have been problems for thousands of years. In some instances those problems were temporarily remedied by frontiers that allowed people to flee and begin again. Space can be that frontier.

    In other instances, some problems are embedded in our societal makeup and are hard to fix. Having 'social experiments' like those necessary to deal with personnel on things like the Mars Mission could enable people to understand those embedded aspects and figure out ways to make them work to the benefit of people.

    Also note that some problems, like energy production and raw material mining, could benefit by looking outward into space. One asteroid of the proper composition could reduce the need to mine thousands of acres and generate megatons of liquid and air based pollution. (Of course, the Earth based miners and related people would need to find jobs. But some could find those jobs in space.)

    When you get down to it, blindly believing that any single set of technologies can fix any or all of our problems is foolish. At the same time, blindly ignoring technologies because 'we need to get our act together first' is also foolish.

  82. Re:You have a profound misunderstanding of finance by Grishnakh · · Score: 1

    It's a good thing people like you never got involved in bridge projects, because we'd all be using ferries every time we wanted to cross a river.

    "Proven" rocket technology still hasn't been proven to be all that safe, just like boats still aren't anywhere near as safe as bridges.

  83. Re:As a general rule of thumb by Anonymous Coward · · Score: 0

    They need all those well-educated people outside the US in order to outsource higher-qualified jobs into cheaper countries. That outsourcing help US companies to save money and therefore be more profitable. So it's absolutely logical to not keep those foreign students in the US where they ultimately would want to get US wages.

  84. If you want a scary thought by Anonymous Coward · · Score: 0

    Has anyone ever contemplated the scenerio of atmosphere wicking if one of these things were successful? (Could that be possible?) And people think the ozone hole is bad.

  85. Nanotubes by juushin · · Score: 1

    Let me qualify my statement. I am a professor of chemistry at a top ten school in the US. The materials-related claims that are made in the rebuttal are far-fetched. How can the interviewee state that 'we could build one today' if we can, at best, produce several grams of CNTs using the Smalley technology, which is probably as good as it gets right now. Where would the other nanotubes come from? Aliens? I agree that this is science fiction not science. Chance favors the prepared mind and this is a case that, as many readers have pointed out, is best characterized by a group of developers waiting for miracles to spontaneously occur.

    1. Re:Nanotubes by Anonymous Coward · · Score: 0

      Let me qualify my statement. I am a professor of chemistry at a top ten school in the US.
      The fuck you are, asshat.
  86. Tethered Towers in Feet by geek2k5 · · Score: 1

    For the preliminary stages, doing measurements in feet is perfectly fine. You have to get off the ground before you fly.

    The space elevator is still in the Wright Brother's level of technology relatively speaking. Getting to 500 feet was equal to the Wright Brother's first successful powered flight. Getting to 100,000 feet would be like the DC3, something that could be useful for such things as wide area communications that are NOT satellite dependent.

    Note that a relatively famous flying machine, called SpaceShipOne, had the call letters N328KF. That stands for 328,000 feet, or 328 kilofeet, the edge of space. If measuring in feet is good enough for them, it is good enough for me.

    I suspect we will see measurements in kilometers when the measurements hit the hundreds of kilometer range. But for the American audience, and potential American investors, using feet and eventually miles is acceptable.

  87. Cyclones and the equator by falconwolf · · Score: 1

    Not at the equator. Which is where this would be. Storms are driven by temperature differentials and Coriolis acceleration, which are both pretty much zero at the equator in the middle of the ocean.

    I feel I need to point out something to you though, many of the hurricanes that hit the US originate in the southern hemisphere off the coast of Africa. To hit the US they have to cross the equator.

    Falcon
  88. Unobtainium by falconwolf · · Score: 1

    Handwavium? Not strong enough. We need Unobtainium.

    I thought Unobtainium was only useful for going to the center of the earth.

    Falcon
  89. Re:I don't think Liftport will work and here's why by Anonymous Coward · · Score: 0

    Curtis? Tim? I'm wondering if I "worked" with you on YelloWWWeb. My name's Jeff. I came in shortly after his site had been broken into. Brought everything back online, got the site running. The last person in there couldn't figure out how to install RedHat on the frontend server, what a joke. From there on out, it was never exactly clear cut what he wanted us to do. The most I ever got resembling a request was to set up a webmail/groupware system for "customers to communicate." I asked what that meant. No real answer from him. How was I supposed to build it then?

    I was one of those high school kids. I knew enough to get along, but unless he told me what he wanted, I couldn't whip up a magical solution for him. I remember him asking me to set up a CVS repository. For what? No code was being written for anything. The only coder there was still reading his "PHP in a Nutshell" book. I left.

    My favorite thing of all was the Compaq Proliant servers that were stacked up on a "rack" of 2x4s.

  90. First man on the moon. by Dr.+Zed · · Score: 1

    I saw the comment how you saw it. If another country were poised to field a viable space elevator, the U.S. would increase their efforts to be the first.

    However, more likely, if another country were to try to field a space elevator, the U.S. would probably be caught playing catch-up and achieve the status of second place. At this point, they would probably find some other challenge to be first at and spin that as the important milestone.

    Ask the average American who was the first man in space, and their response is more likely to be Neil Armstrong than Yuri Gagarin.

  91. not having chlidren by falconwolf · · Score: 1

    You can't forbid people to have kids, but there's a much simpler way to ensure they never have any (no, not neuter them).

    Sure you can, the US governemnt did this in a way to Native American Indians. In a system that only ended in the 1970s doctors working for the IHS, Indian Health Service, sterlized female Indians. Sometimes it was done without the knowledge or consent of them and other tymes they were led to believe they had to have it done. Forced sterilization is ethnic cleansing of Indians.

    You see, population grows, and all of that growth is coming from poor countries, and poor ghettos in richer countries. Truth is, in a modern society, the more educated you are, the better off you are, the more better off you want your kids to be, have access to birth control measures, and eventually have less kids, sometimes even have no kids.

    That's right, the better people's educational and economic situation and the greater the opportunities women have, the lower the birthrate is for the population. That's why the two nations that had the highest birth rates, China and India, have seen their birthrates drop. Meanwhile in developed nations, parts of the EU, Japan, and the USA the birthrate has dropped below the replacement rate needed to keep the same population. If it wasn't for immigrants their populations would colapse. A few years ago the mayor of one town in Italy instituded a tax on singles because their population was falling and he wanted singles to get married and have children. Which is the absolute worse thing he could of done, instead of having singles get married this would drive them away which would make it worse. The worst place for population growth now is Africa which doesn't have nearly enough opportunity for the population as most other places.

    Falcon
  92. Re:Alternatives by Anonymous Coward · · Score: 0

    Spiral escalator? Just talk to NYC's mayor. He put one in his building.

    http://www.curbed.com/archives/2004/09/29/bloomber g_lps_death_spiral.php

  93. How? by falconwolf · · Score: 1

    how exactly how you going to make everyone on Earth rich enough to become educated enough to reduce population growth?

    Improve education and educational opportunities. Mexico has a program now that pays a monthly stipend for some who keep their children in school. After Mexico started it Brazil picked up on it and does the same. Another way to increase third world per capita income is for the first world, specifically the EU, Japan, and the US to stop paying thier agribusinesses hundreds of billions of dollars in subsidies as well as get rid of trade barries and tariffs. Because these nations give their agribusinesses all this money they are able to export their produce to third world nations where they can sale food for less than it costs farmers in those countries to farm. This is one reason "millions of illegal imigrants" are in and more are trying to get into the US. Because of farm subsidies and NAFTA US agribusiness can sale food in Mexico cheap. This drives Mexican farmers off their farms, and there's not many places they can go to make a better life.

    Falcon
  94. expertice by falconwolf · · Score: 1

    It might seem like a minor thing, but if the guy can't be bothered with little details like spelling, grammar, and correct capitalisation, then what were his chances of ever getting the SEC filings done correctly?

    While I believe being able to write correctly is important it's not really needed for him to make SEC filings. Experts such as acccountants will be the ones who actually fillout the paperwork. If Businesses and people were expected to do their one paperwork my sister, who as a CPA runs her own accounting business, would be out of work. Lawyer and others would probably go over the paperwork to make sure it was accurate.

    Falcon
  95. BTW, your sig. by WindBourne · · Score: 1

    You did see the news over at spacex? It sounds like the feds liked what they saw. But, yes, that is one heck of a schedule. It will be cool if they can stick to it, but....

    --
    I prefer the "u" in honour as it seems to be missing these days.
  96. Re:It was doomed to failure by skeptictank · · Score: 1

    A really cheap way to lift stuff to 100,000 Km orbit does render nuclear weapons, IBMs and missile defense obsolete.

  97. In Soviet Russia,... by Anonymous Coward · · Score: 0

    Space elevator will lift YOU!... umm, wait a sec...

  98. Bridge tolls by The+Cornishman · · Score: 1

    I didn't say it was a reason not to do it, I just said that the "Woohoo! Here's an insanely cheap way into orbit" argument wasn't a reason *to* do it. Are your bridge tolls "insanely cheap" from the day of their opening? As a potential investor, I want those tolls to be as high as the market will bear.