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Those Amazing Antigravity Machines?

surfimp writes "Wired is running an interesting article about 'lifters', hovering UFO-looking vehicles that have no moving parts, no onboard power supply, and are capable of levitating simply through the application of high amounts of electrical current. Enthusiasts claim their vehicles are examples of a nascent antigravity technology, while more traditional scientists - including some funded by NASA - view them as nothing more than contraptions harnessing ionic winds."

488 comments

  1. Not Antigravity by Lord+Byron+II · · Score: 5, Informative

    After reading the whole long thing do you finally find out that its not antigravity at all, but an ion engine. It requires an atmosphere to work and is fully directional. Cool stuff, but not antigravity.

    1. Re:Not Antigravity by Anonymous Coward · · Score: 2, Funny

      The difference is moot as the fundamental princible is the same. It's just a matter of how you implement it.

      In fact, had they have done the engine in java, you would have anti-gravity--but since they chose the implementation that they did, you have an ion engine.

    2. Re:Not Antigravity by usotsuki · · Score: 2, Funny

      LOL, two of those suckers and a cockpit, and you have a TIE Fighter... *g*

      (TIE = Twin Ion Engine)

      Damn, I watch too much Star Wars.

      --
      Dreams, dreams, don't doubt dreams, dreaming children's dreaming dreams. Sailor Moon SS
    3. Re:Not Antigravity by grumpygrodyguy · · Score: 5, Interesting

      Levitation lives!

      And yes, this one does work in a vacuum.

      --
      The government has a defect: it's potentially democratic. Corporations have no defect: they're pure tyrannies. -Chomsky
    4. Re:Not Antigravity by Anonymous Coward · · Score: 5, Informative

      Um, did you read the end of the article? Where NASA does an experiment in a true vacuum and it doesn't move?

    5. Re:Not Antigravity by elmegil · · Score: 3, Interesting

      I'm curious where the lift comes from then in the cases where they've blocked the upper wires with straws, or placed a piece of cardboard between one of the upper wires and the lower section. I'm not saying this is antigravity, but it would seem strange that it could be ion wind with no wind.

      --
      7 November 2006: The day Americans realized corruption and incompetence weren't addressing 11 September 2001
    6. Re:Not Antigravity by Mostly+Harmless · · Score: 3, Interesting

      While these devices are only ion engines, I still think that it may be an interesting step towards discovering a true anti-gravity device. But I can't believe that electromagnatism and gravity can be unified at only a few kV of electricity. If that were the case, anti-gravity would have been discovered years ago. Besides, all voltage is is the difference in the number of electrons between two points. Perhaps at high enough voltages the gravitational attraction of the electrons at one point would cause some kind of anti-gravity effect at the opposite point, but I would assume that it would need to be a HUGE potential difference coupled with an extremely small device. Perhaps it isn't voltage at all that we need to look at to unify electromagnetism and gravity. If, that is, they can be unified at all.

      --
      "`Ford, you're turning into a penguin. Stop it.'" -Douglas Adams, THHGTTG
    7. Re:Not Antigravity by dmszero · · Score: 1
      I think the point is that it requires an atmosphere in which to ionise. this produces produces ion wind which in turn produces lift

      no atmosphere, no movement.

      dms0

      --
      -= world leaders choose world leaders not us, not a democracy, not a revolution! =-
    8. Re:Not Antigravity by Anonymous Coward · · Score: 1, Informative

      The author said there was a very noticable wind underneath it.

    9. Re:Not Antigravity by I+Like+Swords!!! · · Score: 1

      Let's look in Star Trek, Star Wars and Buck Rogers for the clues everybody!

      --
      .unsigged
    10. Re:Not Antigravity by Demodian · · Score: 2, Insightful

      Bah, who needs devices and vehicles... We just need to focus our Ki energy and soar around like in Dragonball Z... Flying is the next step in human evolution, according to the World Champion, Mr. Satan!

    11. Re:Not Antigravity by Anonymous Coward · · Score: 0

      If that were the case, anti-gravity would have been discovered years ago.

      You're only assuming that it wasn't actually discovered years ago, of course. We wouldn't necessarily know.

    12. Re:Not Antigravity by Anonymous Coward · · Score: 0

      and also it's the light that goku gives off in dragon ball z when he's about to fight and he turns all yellow and rocks float around him and he says uwaaaaaaaaaaaaa for five minutes and then that's when I say YEAH THAT'S GOKU NOW HE'S GONNA KICK SOME ASS NOW CAUSE OF HIS AURA and then I start jumping on my bed and throwing raisinets everywhere cause I love goku cause he can kick ass like that one time where that one alien guy almost killed him but then he said uwaaaaaaaaaaaaa no wait that was when he was almost killed what he really said was uwaaaaaaaaaaaaa and then he made an AURA and then the episode ended :(

      but on the next episode he still had an AURA and rocks were floating and I was like YEAH YEAH and then he shot a beam at the alien guy and he said uwaaaaaaaaaaaaa and then the alien guy was all like OH SHIT and then the episode ended :(

      but on the next episode goku was all like uwaaaaaaaaaaaaa cause of his AURA and then his beam hit the alien guy and he said uwaaaaaaaaaaaaa cause he got hit cause goku's beam was stronger cause of his AURA and then he died and I was all like YEAH YEAH TAKE THAT YOU ALIEN CAUSE GOKU'S THE MAN CAUSE HE KICKED YOUR ASS AND YOU'RE DEAD YOU SON OF A BITCH and then my mommy came in and spanked me so then I threw my raisinets at her and she spanked me again and took away my pokemon cards and it really SUCKS cause I beat up a lot of kids to get that deck and I could kick your ass at pokemon yeah YEAH cause pokemon rules I love koffing the best cause he's got a neat voice cause in the cartoon he says KOFFING and I laugh a lot and fall off my bed and kick and scream and break all my toys until my mommy spanks me cause koffing is so FUCKING funny when he says things and I have all the pokemon games even the stupid picture game but it got broke once when I didn't get my dragon ball z game cause I was at walmart and I said I WANT A DRAGON BALL Z GAME and my mommy said NO MAYBE NEXT TIME and then I stepped on her foot and said NOW BITCH and then she took me outside and spanked me and I was pissed off and I would have kicked her ass but I don't have an AURA so I told her I wished I was goku cause then she would buy me stuff cause I would make rocks float and I would fuck up her car like that and then my mommy's face turned red and she looked so dumb HA HA HA and she drove home and broke my pokemon game but I don't care cause it was the picture game the stupid bitch and then she came back to walmart cause she forgot to pick me up but it's okay since I bought a snickers with the change I found in the parking lot and I was like YEAH I LOVE SNICKERS YEAH YEAH and I tore it into pieces and threw it up in the air and said YEAH I'VE GOT A SNICKERS AURA but there weren't any rocks floating like what goku does so I took another snickers when no one was looking and was gonna use that too but then the first one was gone so I was like FUCK and then my mommy came and she had a goku action figure and said I'M SORRY I GOT UPSET and then I threw my snickers at her FACE.

      Out of context quote from Spinner. We need auras, the ability to fly, and snickers. From there comes the uberman.

    13. Re:Not Antigravity by tkittel · · Score: 1

      They put the poor frog in 16 TESLA?!?

      IIRC the typical internal magnetic fields of atoms are of the same order.

      Wonder if the little frog doesnt get cancer or something later on...

    14. Re:Not Antigravity by ndogg · · Score: 1

      That may be levitation, but it's still not antigravity. The force of gravity is still acting on those objects, it's just that gravity isn't as strong as the force keeping the objects in the air.

      --
      // file: mice.h
      #include "frickin_lasers.h"
    15. Re:Not Antigravity by pauljlucas · · Score: 3, Insightful
      ... it may be an interesting step towards discovering a true anti-gravity device ...
      If you view gravity as nothing more than the curvature of space-time (as opposed to a "force") caused by the presence of mass, then there's no way to obtain an "inverse curvature" at a given point in space. Hence, there can be no anti-gravity.
      --
      If you reply, do so only to what I explicitly wrote. If I didn't write it, don't assume or infer it.
    16. Re:Not Antigravity by stuffman64 · · Score: 5, Insightful

      The article mentioned the website American Antigravity as a source of information about this "electrogravitics" phenomenon. I clicked on the section about theHutchison Effect. It is said to be "...a very complex scalar-wave interaction between electromagnetic fields and matter." To me, it just proves that people without a solid background in science will believe almost anything they see.

      Take, for example, the pictures in the document. This picture shows what looks like a butter knife embedded in some sort of metal. The metal looks pretty much like tin, lead, zinc, or some other metal with a low melting point. Maybe his scalar waves did this, or some idiot dropped a butter knife in a solder pot, let it cool, and cut it in half to reveal the knife. Who knows.

      The best part comes from the videos at the bottom of the screen. Here, you see this little toy saucer take off and "magically" fly around the room. Video 3 shows the saucer resting on a wooden plank, with the camera close by aiming right at the little magic toy. Soon enough, it takes off and flutters about. Funny how all this energy in such a little space has no ill effects on the camera and its metal bits just inches away. The next 3 videos look remarkably alike, this time showing the craft at a distance. Notice how it lifts and flys, and something on the right hand side of the screen jingles around with similar movements. Again, there are metalic objects within very close distances (like the chains hanging nearby), but the "scalar waves of magic" (my quote) do not affect it. I bet that thing on the right is a fishing rod or a hollow tube with string in it used to manipulate the craft for the camera.

      Alas, we will never know the truth, because unfortunatly, "...Hutchison's experiments have been exceeding difficult to replicate due to the extraordinarily complex arrangement of waveforms that is seemlingly required to generate the Hutchison effect."

      Folks, take most of this stuff with a grain of salt. Sure, flyers fly (I've built one using a busted monitor as a power supply - it work, but according to my calculations, takes about 8000 Joules of energy for a 30 second flight, about the same energy as a family sedan going 7mph, which is quite inefficient), but they just work on well-known principals. Next time you see an "Ionic Breeze" air purifyer, put your hand next to it - you will feel the ion-induced wind blow against your hand. Same thing going on with the lifters, just with a bit more power and a different shape.

      --
      --- At my sig, unleash hell.
    17. Re:Not Antigravity by TheTranceFan · · Score: 1

      IA(definitely)NAP, but even in a vacuum, shouldn't an ion engine work, just because of good 'ol equal-and-opposite-reaction? If you spew ions in one direction I'd expect it to propel your ion-spewer in the other...

    18. Re:Not Antigravity by lokedhs · · Score: 3, Informative

      IAMAS, but isn't it spewing ionised _air_? In a vacuum there isn't anything to ionise.

    19. Re:Not Antigravity by fenix+down · · Score: 1

      Has anybody ever done anything with these things besides levitation? I remember years ago, the last time I heard about these things, thinking that somebody ought to turn one sideways and staple it to a matchbox car or something. It seems kinda boring to just keep floating something a foot off a table over and over.

    20. Re:Not Antigravity by Anonymous Coward · · Score: 0

      Perhaps it isn't voltage at all that we need to look at to unify electromagnetism and gravity.

      Ohh, like The Philidelphia Experiment! Add an FM transmitter and we can have a transporter, too! Just don't walk into any walls..

    21. Re:Not Antigravity by Anonymous Coward · · Score: 0

      If you view the world as nothing more than a flat disc then there's no way to circumnavigate the globe, either.

      In other words, we don't actually know exactly what gravity is.

    22. Re:Not Antigravity by osgeek · · Score: 3, Interesting

      I'm mostly in agreement, but then again, if the best we can do to conceptualize the force of gravity is a depression/curvature in space-time, maybe there's a way to create a bubbling out of space-time... kind of like a hernia in the fabric of space-time.

    23. Re:Not Antigravity by Junior+J.+Junior+III · · Score: 2, Insightful

      Electromagnetic fields can penetrate solid objects. You might not get a breeze through the mesh, but the air molecules on the other side of the barrier will repulse just as nicely as if the barrier wasn't there.

      --
      You see? You see? Your stupid minds! Stupid! Stupid!
    24. Re:Not Antigravity by harrkev · · Score: 1
      If you view gravity as nothing more than the curvature of space-time (as opposed to a "force") caused by the presence of mass, then there's no way to obtain an "inverse curvature" at a given point in space. Hence, there can be no anti-gravity.


      Yet there is a predicted "graviton" (not yet detected, but thought to exist) which is the particle that carries gravity.

      If this is true, then it MAY be possible to affect/block such particles. Then again, maybe not...

      How does one reconcile this particle/curvature theory. Both seem almost mutualy exclusive, unless the particles cause the curvature?!?!?
      --
      "-1 Troll" is the apparently the same as "-1 I disagree with you."
    25. Re:Not Antigravity by ShavenYak · · Score: 3, Funny

      ...kind of like a hernia in the fabric of space-time.

      What happens when space-time collapses on the floor moaning in agony? That's not going to be a pretty sight.

      --

      Hey kids, there's only 5 days left 'til Yak Shaving Day!
    26. Re:Not Antigravity by ShavenYak · · Score: 1

      How does one reconcile this particle/curvature theory. Both seem almost mutualy exclusive, unless the particles cause the curvature?!?!?

      Unless the 'curvature' turns out to be nothing more than a mathematical construct. No one has really proven that space actually curves, only that objects moving in a gravitational field move as if space were curved. Oh, and the curvature makes general relativity easier to grok, but the equations could all be perfectly valid even if space doesn't really curve.

      --

      Hey kids, there's only 5 days left 'til Yak Shaving Day!
    27. Re:Not Antigravity by DarkRabbit · · Score: 5, Funny

      In fact, had they have done the engine in java, you would have anti-gravity...

      And if you did the engine in strong tea you would have an infinite improbability engine, right?

    28. Re:Not Antigravity by t0ast3r_b0y · · Score: 3, Informative

      Besides, all voltage is is the difference in the number of electrons between two points.

      IANALBIAAEE (I Am Not A Lawyer, But I Am An Electrical Engineer).

      That isn't true; voltage and electron density are unrelated.

      It's actually pretty easy to prove to yourself. Consider the following facts (anal physics people, cut me some slack so I can expedite things):

      1. The most telling fact: the terminals of a 12V car battery are electrostatically neutral. Try dropping some lint over one to verify this.
      2. Take a very long U-turn of wire, put a very sensitive and very fast oscilliscope voltmeter in the middle and across the two sides, and suddenly touch the two ends to a 12V battery. If density differences were driving electrons down the wire, the voltmeter would read zero, then smoothly run up to 6V (since it's in the middle); the curve would probably look a lot like a fermi distribution function. This would, of course, only take a few microseconds. However, this isn't what happens. In reality, the voltmeter will sit at zero for a time T, then suddenly (but smoothly) jump up to 12V as the voltage wavefront passes, then will sit at 12V for another T, and jump down (as the reflected wavefront passes), then sit for another T and jump up, and so on while asymptotically approaching 6V. There is absolutely no way you can explain this with diffusion gradients. And yet the reflections obviously happen, because the reason you have to put 50ohm coaxial cable into the 50ohm antenna plug on your TV (matched line and load) is to prevent them!
      3. PN semiconductor junctions (AKA diodes) work because diffusion forces resulting from differences in electron concentration are opposed by a voltage difference that developes across the junction. They can't be the same thing if they oppose one another.
      4. If you have a very large loop of low-impedance wire (to minimize confounding influences), with a battery and a multi-megaohm resistor opposite one another in the circuit, nearly all the voltage drop will be across the resistor. If voltage were a difference in electron density, two two ends of the resistor would have different electrostatic charges, and you could detect this with a piece of electrostaticaly charged string held over the resistor. Even with the resistor dissipating millions of watts (implying a huge difference in electron density between the two sides), the string would hang straight down.
    29. Re:Not Antigravity by jstott · · Score: 1
      Besides, all voltage is is the difference in the number of electrons between two points.

      No. Voltage is the [electrostatic] potential energy difference between two points. The number of electrons involved is irrelevant.

      -JS

      --
      Vanity of vanities, all is vanity...
    30. Re:Not Antigravity by Grendol · · Score: 1

      Yes, and after a little investigation, it was discovered that those things on the wright flyer were not antigravity devices either, but simply canvas stretched over a frame. When will people realize that it is the mundane things in new applications that make the difference between a 3 day train ride and a 7 hour flight? I become irritated when "experts" refuse to even acknowledge ingenious innovation. I hope that when the X-prize winning flight happens, they don't say something like "thats not a space ship, it is just a product of a junkyard wars fanatic." because I think that there will be lessons learned that both NASA and Industry could benefit from, if they only payed attention.

    31. Re:Not Antigravity by Chris+Burke · · Score: 1

      If you view gravity as nothing more than the curvature of space-time (as opposed to a "force") caused by the presence of mass, then there's no way to obtain an "inverse curvature" at a given point in space.

      Why not? It isn't an "inverse curvature", it's just a curvature in the direction opposite to what you would expect. To use the old rubber-sheet analogy: if a mass is a weight that pulls the sheet down causing objects to be drawn into the hole, then anti-gravity would be something that pulls the sheet up.

      Remember, before Einstein gravity -was- a force. Newton's theory yielded very good predictions even to the point of (low speed) inter-planetary travel. General Relativity provides great predictions for a broader set of circumstances, but Einstein is not the last word.

      --

      The enemies of Democracy are
    32. Re:Not Antigravity by b-baggins · · Score: 1

      No, no, no. Everyone knows the secret is to throw yourself at the ground and miss.

      --
      You can tell a great deal about the character of a man by observing those who hate him.
    33. Re:Not Antigravity by Dun+Malg · · Score: 1
      To use the old rubber-sheet analogy: if a mass is a weight that pulls the sheet down causing objects to be drawn into the hole

      The rubber sheet analogy has always puzzled me. What force is causing objects to be "drawn into the hole"? Gravity? The analogy does nothing to explain why gravity works-- it just illustrates the mechanics in a way that's easier to understand. Saying "if we could pull the rubber sheet up" is just a different way of saying "if we could create antigravity".

      --
      If a job's not worth doing, it's not worth doing right.
    34. Re:Not Antigravity by Chris+Burke · · Score: 1

      The rubber sheet analogy has always puzzled me. What force is causing objects to be "drawn into the hole"? Gravity? The analogy does nothing to explain why gravity works-- it just illustrates the mechanics in a way that's easier to understand.

      That's perfectly true, but Relativity doesn't say -why- gravity works, just -how-. The rubber sheet simply analogizes the "how" into the world we know. 4D space-time is converted into a 2D sheet whose deformation makes sense to us. Can you really conceptualize curvy space-time? If so, you're a fucking genius and should go into physics right fucking now. Anyway, the deformation of space time by a mass is analogized to the deformation of the sheet by a mass (and gravity), and the tendency of objects to follow the curvature of space-time is analogized to the tendency of objects to follow the contours of the sheet. Since the tendency of objects to follow the contours of the sheet stems directly from the curvature of space-time caused by the large mass sitting below the sheet, the analogy actually works fairly well.

      The point is that if you can accept that space-time can be bent by masses, there is nothing that conceptually prevents space-time from being bent the other direction by something else.

      Saying "if we could pull the rubber sheet up" is just a different way of saying "if we could create antigravity".

      Well, yes. The parent was saying that anti-gravity would be "inverse curvature", which makes no sense. However, "curvature in the opposite direction from normal" does, and while not something we know how to do, is not necessarily impossible. My understanding is that Relativity actually includes the possibility of such a thing, but Einstein (et al) didn't really think it could exist. Yet astrological observations of the expansion of the universe suggest that it may, and that's where "Dark Energy" theories come from.

      --

      The enemies of Democracy are
    35. Re:Not Antigravity by hesiod · · Score: 1

      > The point is that if you can accept that space-time can be bent by masses, there is nothing that conceptually prevents space-time from being bent the other direction by something else.

      Maybe it could be bent the other way by having a very small object with an insanely large mass? I remember some extremely simple physics equation(s) saying that as something approaches the speed of light its mass goes way up. Well, maybe if we were to hit the speed of light the increased mass would jump to a point where the "space-time curve" would be pulled in the opposite direction due to the immense gravity coming from such a small object.

      Of coure, IANAP, but you could probably tell that from any single sentence in this post. I feel insightful, but I'm sure that will change as soon as one person responds :)

    36. Re:Not Antigravity by hesiod · · Score: 1

      > It's actually pretty easy to prove to yourself. Consider the following facts (anal physics people, cut me some slack

      Easy? I never got too far in Physics, but I have some understanding of very basic electronics. I wouldn't call this easy to understand. Maybe if I was an anal physics person I could, but that's not the intended audience, as you said.

      Voltage wavefront? reflections? asymptotically? What the heck is that? PN semiconductor Junctions? Okay, I understand diodes.. diffusion gradients? I might be able to figure that one out with a few minutes of though (or a few seconds of googling)

      How many people (who aren't physics geeks, mind you) own a multi-megaohm resistor? Even less, own two?

      I'm not insulting you or anything, but if you say "pretty easy to prove," try explaining something that really is easy to prove.

    37. Re:Not Antigravity by hesiod · · Score: 1

      > somebody ought to turn one sideways and staple it to a matchbox car or something

      That seems like a good idea, and it would help show that it's using Ionic Breeze (sorry, it's just an appropriate prase) and not anti-grav. Plus it might be more efficient at moving something perpendicular to gravity instead of trying to oppose it altogether.

    38. Re:Not Antigravity by hesiod · · Score: 1

      > IAMAS[...]

      OH NO! Come get this guy, he's a terrorist! Oh, wait, that's HAMAS. Sorry, false alarm.

    39. Re:Not Antigravity by Scott+Carnahan · · Score: 1

      Unless the 'curvature' turns out to be nothing more than a mathematical construct. No one has really proven that space actually curves, only that objects moving in a gravitational field move as if space were curved.

      Your notion of curvature seems completely useless. Curvature is an intrinsic property of a space indicating infinitesimal changes in distances and angles, and does not depend on any particular isometric embedding in any larger, ambient space. If all possible measurements of distances and angles behaved as if spacetime were curved, then there would be no reason to say it is not curved. Our current measurements (e.g. time dilation in GPS, light deviation, orbiting bodies) are not comprehensive, but there are no known reproducible experiments indicating the contrary.

      Oh, and the curvature makes general relativity easier to grok, but the equations could all be perfectly valid even if space doesn't really curve.

      Which equations do you mean? Curvature is absolutely central to Einstein's field equations.

      --
      "Your notation sucks!" -- Serge Lang (1927-2005)
    40. Re:Not Antigravity by Suidae · · Score: 1

      The tea has to be hot, and you have to put the dangly bit into it then flip the switch.

      And wheres that thing your aunt gave you that you don't know what it is?

    41. Re:Not Antigravity by Anonymous Coward · · Score: 0

      Insightful... OMFG...

    42. Re:Not Antigravity by Anonymous Coward · · Score: 0

      You believe in gravity? Everybody knows that Gravity is a myth, like chiggers.

    43. Re:Not Antigravity by brakk · · Score: 1

      So, like, if I took a bunch of those air filter thingies from sharper image and tie them together facing the ground I could make my own spaceship?

      Sweet!

    44. Re:Not Antigravity by Thuktun · · Score: 1

      If you view gravity as nothing more than the curvature of space-time (as opposed to a "force") caused by the presence of mass, then there's no way to obtain an "inverse curvature" at a given point in space. Hence, there can be no anti-gravity.

      However, if they find that there is indeed a mediating particle (graviton) for the gravitational force, and one could lessen the effects of those particles or even block them, the gravitational force would thus be lessened or blocked.

      Perhaps something analagous to a Faraday cage for gravitational effects.

    45. Re:Not Antigravity by Mostly+Harmless · · Score: 1

      Hmm. In my understanding, one volt is equal to the electric potential difference between two points on a conductor carrying a current of one amp with a power dissipation between the two points of one watt. Fine. But what then, exactly, is potential difference? I thought that it was the difference in charge between two points. Isn't that the same as electron density?

      --
      "`Ford, you're turning into a penguin. Stop it.'" -Douglas Adams, THHGTTG
    46. Re:Not Antigravity by lokedhs · · Score: 1
      If was a real slashdot weenie, I would have mod points, and if I had, you'd get a whole bunch of "funny" ones from me. :-)

      Just for the record: I intended to type IANAS, but my keyboard disagreed.

    47. Re:Not Antigravity by barawn · · Score: 1

      No - you're missing the entire point of the rubber-sheet analogy if you think that the point is that the objects are drawn to the hole. It most definitely does explain why gravity works.

      The rubber sheet analogy is 2D gravity. That is, objects are constrained to be on the surface of the sheet, and cannot move up, and cannot move down. "Real gravity" - that is, the thing that's holding the ball to the sheet - is just an implementation of the 2D world in a 3D world (by restricting an object's motion in one dimension).

      Gravity in the 2D world is the deformation of the sheet itself, rather than an actual external force. A mass presses down on the sheet, causing a deformation in it, and it presses down on the sheet because that's what masses do (not because of "real gravity") - mass (well, stress-energy) = 8*pi*G, where G is some construct that tells you how much the sheet deforms. That's what general relativity says, fundamentally - the whole shebang, right there. Mass deforms spacetime. In the 2D sheet, it deforms it because gravity pulls down on it. In our world, it does it "just because". In short gravity works because mass deforms space and time. Now, if your comment was that it does nothing to explain why mass deforms spacetime, you're right. If you want to explain why a deformation in spacetime equals mass, then you've got to work out quantum gravity, because in general relativity, mass is just a construct which causes a deformation in the sheet.

      Now, obviously, you should already realize the answer to the parent's comment: what would "pull the rubber sheet up?" Getting rid of mass. Until you find something else which deforms spacetime (which, well, we haven't, but there are wacky theories: most of the FTL general relativity ideas involve "negative mass" - that is, things that bend spacetime differently than normal mass) the only way you're going to reduce the gravitational effects caused by something is to reduce its mass.

      Most other people here point out that gravitons could be "affected, or blocked", and the simple answer to that is "no". That's like saying "maybe we could find a way to make neutrinos interact more, and harness their energy!" (because frankly, if we could, that'd solve all of our energy problems. The Sun puts out a ton of neutrinos) - well, the whole point is that neutrinos interact only weakly. That's virtually their definition. You can't get them to interact more, because there's no way to do it. Same with gravitons. Gravitons will only interact gravitationally, and thus, the only way we can affect them is, well, with gravity. (Amazing Device Causes Antigravity! "Warning, device is approximately the mass of the Earth, and may cause harm to others in your vicinity as well as the rest of the solar system")

    48. Re:Not Antigravity by Anonymous Coward · · Score: 0

      anti-Mass?

    49. Re:Not Antigravity by Anonymous Coward · · Score: 0

      http://www.icehouse.net/john1/index11.html

    50. Re:Not Antigravity by gurumeditationerror · · Score: 1

      If something with mass got to the speed of light it would have infinate mass and therefore an infinte gravitational force and therefore would pull everything to it infinatly fast and we'd all be infinatly fucked. .....Maybe.

    51. Re:Not Antigravity by gurumeditationerror · · Score: 1

      you don't need to own a multimegaohm resister you just need a lot of 470k's...

    52. Re:Not Antigravity by gurumeditationerror · · Score: 1

      Thats it, you charge the air around the point of your ioniser, its charge repels it fron the ionising point. If there is nothing to charge there is nothing to ionise and nothing ionised to push away to give the equal-and-opposite force.

    53. Re:Not Antigravity by barawn · · Score: 1

      OK, I'll respond. :) Actually, your comments are pretty much the same questions most people have when they start learning relativity, because it's counterintuitive. It's very difficult to separate out different ideas in physics.

      So, addressing this:

      First, a small object with an insanely large mass would (of course) cause "antigravity" - if, by antigravity, you mean "yanked away from the Earth's surface and sucked into it" - if its gravitational pull is more than the Earth's. The size of an object isn't important (to first order - to second order, it affects tides) just its mass. So an insanely small object with an insanely large mass would act like, well, a normal-sized object with an insanely large mass, or a large sized object with an insanely large mass. In other words, if you wanted to counteract Earth's pull, you'd have to put something the mass of the Earth roughly the same distance as the center of the Earth away from you. You could get away with something smaller if it was much closer, though (but nothing reasonable-sized, of course. It's never going to get more than about half-a-meter from your center of mass, and so it's always got to be huge). That'd be "antigravity"... so long as you were in the centerline between the two masses, and didn't move in the slightest. (That's the L1 point - the point of equal attraction between two bodies: it's unstable. If you move, the pull from one of them pulls you away from that point) It's probably not the antigravity you're thinking of, but that's what would happen.

      Second point: The whole "as something approaches the speed of light, its mass goes way up" is a concept that just plain needs to die. It's far too misleading to most people, and it serves no useful purpose. The "mass" of any object can be basically replaced with its energy, which is the sum total, in quadrature, of its kinetic and its rest energy. Normally an object's kinetic energy is pathetic compared to its rest energy: a proton in a hydrogen atom, at room temperature, has gamma (energy/rest mass) of 4E-35 - a bit small. But at you add energy to the object, that kinetic energy becomes significant at some point, and relativistic effects start to work. Basically at that point, the basic equations of kinematics start to have a factor that was "1" start to become much more than 1. What's really changing is the relationship between a change in momentum and a change in energy. At low energies, if you double the "delta-P", you quadruple the "delta-E": that is, if you give some object a delta-P of 10 kgm/s, then another object of the same mass a delta-P 20 kgm/s, the second object's change in energy will be 4 times higher than the first. At high energies, if you double the "delta-P", you double the "delta-E" - it's linear, not quadratic.

      In addition, there's also a change between an object's velocity and its momentum - it's the same factor that appears in all relativistic kinematics equations - gamma, the ratio of energy to rest mass. The real equation is p = mv*gamma, which, if you're smart, you may notice becomes p/gamma = mv, and since gamma = E/m, then p/E = v. Remember that I said the real change is that "delta-E" goes from being quadratic in "delta-P" to being linear? Well, if it's linear, then p/E approaches a constant - that is, at high energies, your velocity approaches a constant, and that constant is the speed of light.
      (and since E is always greater than p, because it has the rest energy as well, it's always less than the speed of light).

      So. Does this affect gravity? Yes, but only because gravity only gives a damn about energy - good old fashioned energy - both the rest energy AND the kinetic type, and it doesn't care in the tiniest bit which you have. Neutrinos, for example, have ridiculously small mass (less than 10^-3 eV, if memory serves, which is about 10^12 times lighter than a proton), but in most places where they're seen, they've got a couple keV of energy - so they've got a gamma of 10^9 or more. So, as far as anyone will ever be able to tell, they're going the speed of light. But as far as gravity's concerned, they have far less than a proton at rest, and it's still the same old "sucking" kind.

      Hope that helps.

    54. Re:Not Antigravity by hesiod · · Score: 1

      > you don't need to own a multimegaohm resister you just need a lot of 470k's..

      Is that a joke? I don't get it. What's a 470k? Or do you mean a bunch of 470K resistors? Is there something special aout that resistor?

      (love your handle, BTW, I used to be an Amigahead)

    55. Re:Not Antigravity by Dun+Malg · · Score: 1
      Relativity doesn't say -why- gravity works, just -how-. The rubber sheet simply analogizes the "how" into the world we know. 4D space-time is converted into a 2D sheet whose deformation makes sense to us.

      Sorry, what I meant to say was "People's use of the rubber sheet analogy in the context of 'what is gravity' has always puzzled me."

      The parent was saying that anti-gravity would be "inverse curvature", which makes no sense. However, "curvature in the opposite direction from normal" does, and while not something we know how to do, is not necessarily impossible.

      This is true. I was merely pointing out that saying "hey, why don't we just pull the sheet UP to get antigravity" is as inane a statement as standing up in a board of directors meeting and saying "I've got it! If we reduce costs and increase productivity, we'll make more money!" (apologies to Scott Adams)

      --
      If a job's not worth doing, it's not worth doing right.
    56. Re:Not Antigravity by Dun+Malg · · Score: 1
      No - you're missing the entire point of the rubber-sheet analogy if you think that the point is that the objects are drawn to the hole. It most definitely does explain why gravity works.

      It does nothing of the kind! The rubber sheet analogy is a mapping of 3D space to a 2D plane, which frees up a dimension to illustrate a "real" 4th dimension. The analogy requires that one assume some sort of "gravity" to pull the mass on the sheet down. Also, objects moving along the sheet require some sort of "gravity" to be assumed in order to be pulled down the pocket in the rubber sheet. The rubber sheet analogy is an illustration of the mechanics of gravitational attraction, but does not offer ANY additional information as to what gravity is.

      --
      If a job's not worth doing, it's not worth doing right.
    57. Re:Not Antigravity by Chris+Burke · · Score: 1

      Hmm... I was just thinking some more about the rubber sheet.

      Assume an infinite, frictionless rubber sheet. If you only consider the 2-dimensional position of objects on the sheet, then I'd intuitively wager that the objects would behave exactly as Relativity predicts, only restricted to two dimension. The constants used in the equations would be different, and would be an expression of how flexible the rubber sheet was.

      Now consider the residents of Flatland. They are living on the sheet. The sheet actually exists in 3 dimensions, but the Flatlandians are only aware of 2. They would experience that 3rd dimension and the curvature of the sheet as a tendency to be drawn towards large objects. They might call it "gravity". But gravity is actually working in the 3rd dimension, pulling the sheet and the objects on it down. The Flatlandian version of Einstein might theorize that this was the case, and draw up a theory of how space-time bends.

      Now consider a 3-dimensional infinite and frictionless "sheet" in a 4-D universe. The Cubelandians living there are only aware of 3 dimensions, and experience the curvature of the sheet in the 4th dimension as a tendency to be drawn toward other objects in 3-D space, even though gravity is a 4th dimensional force pulling on the sheet. Like the Flatlandians, the Cubelandians are stuck on the sheet. However they are aware of and can measure the 4th dimension as "gravitational potential". Cubic Einstein develops a theory to express this...

      I could keep going like this -- imagine a 4-D sheet and a 5-D universe and a Hypercubelandian Einstein, etc. I could also theorize that motion in the 4th dimension alone is possible, i.e. leaving the sheet. But I'm not a theoretical physicist, so I'll just be happy with being able to better understand what "curvy space-time" means or might mean. I still can't conceptualize the 4-D universe and 3-D sheet we live on directly, but the 2-D one does the job.

      --

      The enemies of Democracy are
    58. Re:Not Antigravity by Chris+Burke · · Score: 1

      Sorry, what I meant to say was "People's use of the rubber sheet analogy in the context of 'what is gravity' has always puzzled me."

      Well, since Einstein says that gravity "is" the curvature of space-time, I don't think it is all that bad. See my other reply.

      This is true. I was merely pointing out that saying "hey, why don't we just pull the sheet UP to get antigravity" is as inane a statement as standing up in a board of directors meeting and saying "I've got it! If we reduce costs and increase productivity, we'll make more money!" (apologies to Scott Adams)

      Of course. It is useless from a practical standpoint. But which is more insane -- the clueless manager who stands up and says "we should cut costs and increase productivity", or the clueless manager who stands up and says that isn't possible and makes no sense? :)

      --

      The enemies of Democracy are
    59. Re:Not Antigravity by confused+one · · Score: 1

      IAAP (but not a PhD), you need something to ionize for an ion engine to work. In a vacuum, there's nothing to ionize. Ion engines in satellites use Xenon or something equiv. as the "fuel"

    60. Re:Not Antigravity by Master+Rux · · Score: 1

      Everyone knows that anti-gravity is achieved by straping buttered toast to a cat's back, with the butter side up. Not sure how much thrust they generate, but the more the merrier! And it helps with that whole pet overpopulation thing.

      --
      IMO the best browser game ever http://wittyrpg.com
    61. Re:Not Antigravity by joshuac · · Score: 1

      ---snip
      The Flatlandian version of Einstein might theorize that this was the case, and draw up a theory of how space-time bends.

      ---snip

      NO No no...The Flatlandian version of Einstein might theorize that this was the case, and become a mystic, to whom Yendred would journey to learn a little of the truth about his "friends".

      (sorry, couldn't resist)

    62. Re:Not Antigravity by Anonymous Coward · · Score: 0

      microsucks ad,s on slash dot what next??

    63. Re:Not Antigravity by gurumeditationerror · · Score: 1

      I don't know whats so special about the number 47 but you get all sorts or multiples of 47 with resistors, 470, 4.7k, 47k, 470k... 470k is close to 500, which is half of 1000... Look I just plucked a number out my head. There is no reason other than its the first number to come into my head.

    64. Re:Not Antigravity by Dun+Malg · · Score: 1
      Well, since Einstein says that gravity "is" the curvature of space-time, I don't think it is all that bad. See my other reply.

      Regardless of what Einstein said, curvature of spacetime alone doesn't explain how gravity works. A large mass may "pull" the spacetime sheet down into a funnel shape, but it doesn't address why an smaller mass placed within that funnel slides downhill into it. The rubber sheet illustration still depends on a gravity-like force pulling "down". It seems to me to be a redefinition of "gravity" in terms of...well..gravity.

      Of course. It is useless from a practical standpoint. But which is more insane -- the clueless manager who stands up and says "we should cut costs and increase productivity", or the clueless manager who stands up and says that isn't possible and makes no sense? :)

      Heh. Inane, not insane. Saying "why don't we pull the sheet UP?" isn't irrational, it's just a restatement of the problem presented as a solution. As such, it's totally devoid of substance.

      --
      If a job's not worth doing, it's not worth doing right.
    65. Re:Not Antigravity by Felinoid · · Score: 1

      Your refering to this as a toy makes me think back to the hovering toy I got once back. It used a small fan to lift it off the ground and the wind outside pushed it around.
      Yep a toy hover not antigrav of any sort. It was neat in any case.
      Dose this fit the antigrav on the web site?

      --
      I don't actually exist.
    66. Re:Not Antigravity by nebular · · Score: 1

      True there is a theoretical particle for gravity called the graviton, however if you take a look at quantum physics, there's a theoretical particle for every kind of energy transfer.

      Hawking devoted a good chunk of the first chapter of a brief history of time to this.

      Since the graviton is a pure force particle, it acts on anyting it comes into contact with. The only way to counter act force particles are with opposite force particles.

      So technically anti-gravity could be described as a force that acts against gravity in such a way to negate it's effect. Or simpler jumping.

      Well jumping would be short term anti-gravity. Long term would be escape velocity.

      However that's not as fun.

    67. Re:Not Antigravity by Chris+Burke · · Score: 1

      "pull the sheet up" was never presented as a solution to the problem, so the fact that it isn't a solution is irrelevent. the first person I responded to said "inverse curvature", hence anti-gravity, is impossible. i'm saying GR says no such thing, and trying to explain how such a thing could be possible, NOT how you'd do it. it may -be- impossible, but not because "inverse curvature" makes no sense, or because GR says so.

      no theory says how it -works-. WHY are oppositely charged particles attracted to each other? the electromagnetic force. what is that? why does it exist? like any 5 year old or watcher thereof knows, you can go on like this forever. that doesn't stop us from using these theories to make predictions.

      P.s. now that you know what i'm saying, try searching google (or space.com) for "dark energy" to see how astronomers suspect that not only is anti-gravity possible, it may be dominate in the expansion of the universe.

      --

      The enemies of Democracy are
    68. Re:Not Antigravity by barawn · · Score: 1

      It does nothing of the kind! The rubber sheet analogy is a mapping of 3D space to a 2D plane, which frees up a dimension to illustrate a "real" 4th dimension. The analogy requires that one assume some sort of "gravity" to pull the mass on the sheet down. Also, objects moving along the sheet require some sort of "gravity" to be assumed in order to be pulled down the pocket in the rubber sheet. The rubber sheet analogy is an illustration of the mechanics of gravitational attraction, but does not offer ANY additional information as to what gravity is.

      Read the *rest* of the comment, then, not just the beginning. In it I pointed out that if you were in fact asking this question, then there are two answers.

      Why does the mass deform the sheet?

      1) Because that's what mass does - that's the whole point of general relativity, saying "mass deforms spacetime", which in turn, looks like an attractive force.

      2) Well, if you're asking why "mass" - that is, the "mass" that we're all accustomed to thinking is "mass" - that which provides inertia, the "field-squared" term in the Lagrangian - if you're asking why that pulls the sheet down, that's a lot more complex, and it's a completely different thing than asking what is gravity? The rubber sheet analogy shows that a deformation in spacetime can act like a gravitational force. GR then says "mass causes the deformation in spacetime", which is usually explained, in the rubber sheet case, by someone saying "mass causes space to be deformed, like this rubber sheet."

      I don't see how it's unclear, other than the 'fundamental deep question', which, well, no one has a clue about yet.

    69. Re:Not Antigravity by pauljlucas · · Score: 1
      A large mass may "pull" the spacetime sheet down into a funnel shape, but it doesn't address why a smaller mass placed within that funnel slides downhill into it.
      Yes it does. The smaller mass is moving inertially in a "straight" line having no forces act upon it. But since space-time is itself curved, the mass "slides downhill" (to use your words). It's kind of like riding on a train: if the train turns, it's because the tracks curve. As far as the train is concerned, it's just going forward.
      --
      If you reply, do so only to what I explicitly wrote. If I didn't write it, don't assume or infer it.
    70. Re:Not Antigravity by barawn · · Score: 1

      Missed this before...

      Also, objects moving along the sheet require some sort of "gravity" to be assumed in order to be pulled down the pocket in the rubber sheet.

      This is completely wrong. Again, the rubber sheet analogy uses gravity to restrict the objects to a 2D surface. They can't move off the 2D surface. Moving across the 2D surface, with the mass distorting the sheet (because that's what mass does, see above comment), if they are restricted to the 2D surface, they will be deflected, distorted, or drawn into the distortion in the sheet simply because they are following the sheet, NOT because of any external gravity! This would NOT be true if the sheet was nondistortable (and the endpoints fixed!).

      In this case, gravity is what's causing the object to remain on the sheet. If you had some sort of magnetic force holding the test object onto the sheet, it'd produce the same result. It wouldn't explain why the sheet is pulled down (again, that's just what mass does - in this case, you'd have to do it yourself) but it most definitely, very much so, explains why objects get deflected when they pass near the object.

  2. Amazing by drewbradford · · Score: 5, Funny

    Flying without moving parts! Why couldn't someone come up with this sooner?

    blimps... hot air balloons...

    1. Re:Amazing by Anonymous Coward · · Score: 2, Interesting

      You think blimps don't have propellors? Balloons don't have giant torches which have to be opened to go up and flaps on the top to go down?
      With these things, it would be concievable to do everything with a few radio dials. One for lift, one for the left thruster, one for the right thruster, and one for reverse.

    2. Re:Amazing by Mooncaller · · Score: 1

      How about CO2 cylinders that have the valve knocked off. Those puppies fly and they have no moving parts, well maybe the CO2 could be concidered a moving part. Anyways this story gave me quite a lift. I've been kinda stressed preparing for a trip to an interview. I'll be in the air in a about three hours. Time to jet. Now if I could only safely strap 60,000 volts to my butt and hover to where I need to go. Whould'nt have had to spend my last $100 on a plane ticket.

    3. Re:Amazing by ergo98 · · Score: 2, Insightful

      Oh, and several thousand pounds of batteries, or maybe a engine running a generator...

    4. Re:Amazing by Anonymous Coward · · Score: 1, Funny
      As you know, birds do not have sexual organs because they would interfere with flight. [In fact, this was the big breakthrough for the Wright Brothers. They were watching birds one day, trying to figure out how to get their crude machine to fly, when suddenly it dawned on Wilbur. "Orville," he said, "all we have to do is remove the sexual organs!" You should have seen their original design.] As a result, birds are very, very difficult to arouse sexually. You almost never see an aroused bird. So when they want to reproduce, birds fly up and stand on telephone lines, where they monitor telephone conversations with their feet. When they find a conversation in which people are talking dirty, they grip the line very tightly until they are both highly aroused, at which point the female gets pregnant.

      -- Dave Barry, "Sex and the Single Amoeba: What Every Teen Should Know"

    5. Re:Amazing by brakk · · Score: 1

      So, THAT's why they never had kids!

  3. heh by miseryinmotion · · Score: 5, Funny

    I can see the media's interpretation already:

    So, to lose weight, apply massive amounts of electrical current

    1. Re:heh by prockcore · · Score: 3, Funny

      It's proven to work! Look at all the people who went to the electric chair! Skinny as a skeleton!

    2. Re:heh by Tablizer · · Score: 2, Funny

      [Weight-loss] proven to work! Look at all the people who went to the electric chair! Skinny as a skeleton!

      and a cool hairdoo to boot

    3. Re:heh by Lord_Dweomer · · Score: 4, Funny
      " I can see the media's interpretation already: So, to lose weight, apply massive amounts of electrical current"

      Darwin's Legacy lives on.......

      --
      Buy Steampunk Clothing Online!
    4. Re:heh by slickwillie · · Score: 4, Funny

      I expect to start getting Spam tomorrow:

      LOSE 200 POUNDS INSTANTLY grskyml

    5. Re:heh by Anonymous Coward · · Score: 0

      I saw an infomercial the other day in a Turkish restaurant in Germany where they were doing just that. They had people putting electrodes on their skin. The machine involved delivered a regular electrical pulse to that part of the body, causing the muscles to contract repeatedly.

      It looked really disgusting, and I can't believe people are so lazy as to let a machine tell their muscles to work out instead of doing it directly with their brains. But anyways, it's already being done.

    6. Re:heh by lokedhs · · Score: 1
      From: betty721919xud@hotmail.com Subject: l0se weight now! nccixuxz oxizcix cozixuc

      As seen in WIRED MAGAZINE!

      LOSE WEIGHT without MOVING any of your PARTS!

      Yes! It's true! Sciense has finally provided us with the solution. Now YOU can gain access to the amazing new weight loss discovery that NASA is researching. click here to learn more!

    7. Re:heh by Baloo+Ursidae · · Score: 1

      Someone find this man the "after" photograph of the fat man who cooked to death in the electric chair instead of electrocuting...I thought ir was on rotten.com but I can't find it now...

      --
      Help us build a better map!
    8. Re:heh by physicsboy500 · · Score: 1

      Of course you'll only find that after the Spam saying:
      "TRULY GIVE LIFT TO YOUR *censored anatomy* mlbsty"

      --
      The original generic sig.
  4. Further reading by Sir_Dill · · Score: 5, Interesting

    check out americanantigravity.com

    This is a site run by this guy I used to work with...pretty interesting stuff.

    I think it messed with his head a little though.

    1. Re:Further reading by Anonymous Coward · · Score: 1, Informative

      RTFA! This is the guy who was featured in much of the article. Check out the site, nonetheless, but read the article first...

    2. Re:Further reading by nomel · · Score: 4, Funny
      The flame is drawn towards the 30-gauge collector wire when power is applied partially through an aerodynamic push from ions travelling from the emitter to the collector, but also because the flame is a mixture of combustion-gasses and gas-plasma that picks up and carries charges in the air-gap to the collector.


      One time, with a small 4kv power supply (hurt, but not too much), I tried something like this. I put a wire near the flame, near the base, and charged myself with the other. I then put my finger next to the flame as to give the illusion that I was controlling the flame. Well, it worked too good, and the flame shot at my finger, bending directly onto it. I not only got burnt almost instantly, but got shocked a little as well! Heheh. Stupid me.
    3. Re:Further reading by Anonymous Coward · · Score: 0

      Karma Whore?? This was mentioned many times in the article.

    4. Re:Further reading by Tablizer · · Score: 5, Funny

      Well, it worked too good, and the flame shot at my finger, bending directly onto it. I not only got burnt almost instantly, but got shocked a little as well!

      Trying to win a Darwin Award in multiple simultaneous categories?

  5. Obligatory boobie joke by Faust7 · · Score: 4, Funny

    Those Amazing Antigravity Machines

    Joke completed.

  6. More traditional scientists? by Muerte23 · · Score: 5, Insightful

    You mean the ones that deal with facts, and actual forces of nature?

    If you read to the end of the wired article, he talks about a controlled nasa experiment that showed that the effect doesn't work in vacuum.

    Also, it's not high amounts of electrical current as stated in the headline, it's high voltage. A high voltage (~20kV) wire on top ionizes air molecules which are accelerated downward toward an oppositely charged wire. Action, reaction, upward force.

    No anti gravity here. But maybe enough voltage to kill yourself. Maybe soon we will get a darwin award for an anti gravity attempt that never actually leaves the ground...

    Muerte

    1. Re:More traditional scientists? by probbka · · Score: 5, Informative

      It's the current (amps) that kill, not volts...

      At least that's what my freshman physics teacher always said.

      --
      Only requirement for good karma: be pedantic as much and as often as possible.
    2. Re:More traditional scientists? by Dylan+Zimmerman · · Score: 2, Redundant

      Volts jolt, but mills kill.

      You can pump hundreds of thousands of volts through the human body and it won't actually kill you as long as the current is low enough. However, it only take a small amount of current to kill yourself. I forget the actual numbers, though.

    3. Re:More traditional scientists? by Lockjaw · · Score: 2, Insightful

      It's got all the thrust of an ion engine (i.e., almost none), but it only works in the atmosphere, where wind current is going to create a dynamic pressure which swamps out its thrust.

      Very cool toy, but nothing more.

    4. Re:More traditional scientists? by SanLouBlues · · Score: 1, Funny

      That reminds me of a friend named Maurice. Not only did he accidentally kill himself with one of these things, but they couldn't bury him because his corpse wouldn't stop hovering six feet above the ground!

    5. Re:More traditional scientists? by Barkmullz · · Score: 2, Informative

      Since you brought up volts, amps and dying I thought this link would be appropriate.

      --
      Ronald said nothing. He flung himself from the room, flung himself upon his horse, and rode madly off in all directions.
    6. Re:More traditional scientists? by Have+Blue · · Score: 0

      Should have just dug his grave 12 feet deep then.

    7. Re:More traditional scientists? by Animaether · · Score: 3, Interesting

      I don't recall the exact number either (I know it's in a school book around here), but I do recall my teacher asking us once :
      "Do you know how we know (N)mA kills ?"

      Conjectures of theoretical resistance in a human body through the various organs etc. were supplied, but all dismissed for the supposed true answer :
      "The best way to find out is by experimentation. Mr. Mengele did just that. And now we know."

      That was followed by the rest of the hour discussing the ethics of using this data knowing that it was obtained through such means, and whether the apparent blind acceptance by us to use these data would encourage other scientists (if one can call Mengelere that) to perform similar atrocities in future quests for knowledge.

    8. Re:More traditional scientists? by EvanED · · Score: 1

      It's a combination... all it takes is a tiny about, I think only a few millivolts, of potential arcoss your heart and it'll stop. The difference is how it gets there; a high enough voltage or current will do the trick (I don't know which has to be "higher", though such a comparson is inherantly nonsensical). However, I think the biggest thing, for AC current at least, is the frequency.

      High frequencies go over the skin more than through your body and vice versa. Or maybe that's backwarks. But whatever.

      My point is that all three can be deadly.

    9. Re:More traditional scientists? by Anonymous Coward · · Score: 1, Insightful

      Actually, you can't pump any amount of volts through anything at all. Saying that you can "pump 100,000 volts through the human body" makes just as much sense as saying you can "pump 175 feet of height through Niagara Falls".

    10. Re:More traditional scientists? by Neurotensor · · Score: 3, Informative

      It's the current (amps) that kill, not volts...

      At 20kV it doesn't take much capacitance to give you a boot - a brief current pulse as you discharge the capacitance. And if the power supply is still switched on, then your flesh tends to burn where the hot spark touches you. Volts seldom occur without Amps so don't go around thinking you're not going to die when you touch a 20kV source ;) If you're lucky you'll just be really sore afterwards. Ever touched the EHT lead of a switched-off TV?

      At least that's what my freshman physics teacher always said.

      Well then by all means touch the TV lead with a fast ammeter (CRO and resistor) and you will find out he was right, it's the Amps that will kill you ;) Or take my word for it and don't touch 20kV.

    11. Re:More traditional scientists? by Guppy06 · · Score: 1

      IIRC, it's not even "amps" so much as "amp." I think people quote potentials because "10,000 volts" sounds more threatening than "2 amps."

    12. Re:More traditional scientists? by Guppy06 · · Score: 1

      Part of the problem is when people talk about "pumping volts through something." Voltage is a potential, just like m/s^2 (or, more simply, G's). If it sounds silly when you say "G's" instead of "volts," odds are it's silly when you say "volts" as well.

    13. Re:More traditional scientists? by SWTP_OS9 · · Score: 2, Informative

      Lets see if my old mental data banks are correct:

      The killing level I think is around 50ma at cant remember the potential spect {IE voltage} but below its a tingle and above burns the contact area so it forms an insulation. It mostly affect the heart.

      Usualy when you touch a 110 outlet it usualy makes the mussels contract pulling you away breaking the "circuit".

      The defirbulator uses high voltage of around 100 to proabbly around 400 volts but just enough current to affect the heart.

      You do get a surface effect at high frequency. Hum. Possiblity wrong but that occures starting around 100mhz or was it 400mhz? Too many years ago for me.

      Regular AC is switching at 60 cycle per second.

      The worse burn you can get electricaly is an RF burn! Those go to the bone! And hurt like heck!

    14. Re:More traditional scientists? by pagan26 · · Score: 2, Informative

      The amount of current is 50 mA. That is all it takes.

      --
      Open Source: Every now and then, you get what you don't pay for.
    15. Re:More traditional scientists? by scp_1 · · Score: 2, Interesting

      How much current can you survive? physics.mps.ohio-state.edu

      That's right as little as 0.1 amps can be fatal. A standard wall socket can supply 20 amps.
      Now off you go to build your very own lifter.

      For those of you who read the article and see that yes it is possible and no it's not anti-gravity; you might want to do a quick calculation of the breakdown voltage of air. (Lookup Paschen's Law in a physics textbook.) So you have an estimate of how far your high voltage supply can arc and how close you can let the cats get to your lifter.

    16. Re:More traditional scientists? by Anonymous Coward · · Score: 0

      It's the current (amps) that kill, not volts...

      At least that's what my freshman physics teacher always said.


      His name wasn't Gregory Hines was it? :o)

      From the movie "Running Scared" - Billy Crystal and Gregory Hines are chasing the bad guy through an electric train yard.. Someone mentions the danger of electrocution, and Crystal asks how many volts the lines carry; Hines says "It's not the volts that kills you, it's the amps", so Crystal asks "OK then, how many amps?" to which Hines replies "Enough to drive a train."

    17. Re:More traditional scientists? by Anonymous Coward · · Score: 0

      Ionic Winds in traditional cosmology are real important, and moving sattelite antennae & solar panels around with it is probably interesting to NASA. They have thousands of jet devices to make everything float, but they take a fuel. Remember, its an ionic wind from the Sun that make the USA flag wave on the moon. Gravity is soooo much weaker than everything else on the forces menu, that it just gives up the booty on this floating tinfoil deal.

    18. Re:More traditional scientists? by mindriot · · Score: 1, Insightful

      I think they could've shown this anti-gravity stuff to be bullshit much easier... if it were a real device defying gravity, why the hell would it lift off the ground, and why the hell should it stabilize at any certain height, such as two feet? There's nothing there that could induce an upward movement if it only "turned off gravity." It should stay at the exact same location unless it uses some extra device to accelerate it in some direction. Also, if the thing is lifted off the ground and you raise the ground below it, the thing will probably rise too - which would clearly show that it's interacting with the air most likely. A real levitating device should not change its height simply because you raise the floor below it...

    19. Re:More traditional scientists? by AlphaSector · · Score: 1

      Actual, it takes both high current and high voltage to kill someone, and I would know both from experience. I've seen a car better, which has a lot of current but only 12v shock someone. And when installing light tubes that used 9600 volts at 30 milliamps someone got shocked, not killed.

    20. Re:More traditional scientists? by donheff · · Score: 1

      That is correct, I found out through mishap. When I was a kid I built a Jacob's ladder out of brass curtain rods and a 20kv neon sign transformer. A Jacob's ladder is one of those Frankenstein movie devices where an arc of high voltage current travels up two diverging metal rods and then evaporates at the top - all with a lot of buzzing and crackling. My ladder worked great but you had to keep adjusting the angle of the rods so that the arc would travel up to near the top. At one point I opened the gap too much and the arc wouldn't start. Without thinking I squeezed the rods to bring them closer together -- ZAP 20kv!! It was shocking but not really any worse that a 110v house socket shock. The sign transformer was high voltage but could only deliver a small amperage. I assume the way it works is the transformer can actually only produce the rated voltage if the resistance is extremely high.

    21. Re:More traditional scientists? by Anonymous Coward · · Score: 0

      Actually, something that ignored gravity would appear to zip off at stupid miles per hour, as it would remain (relatively) stationary compared with the Earth, which is moving at quite some speed.

    22. Re:More traditional scientists? by Havokmon · · Score: 1
      If you read to the end of the wired article, he talks about a controlled nasa experiment that showed that the effect doesn't work in vacuum.

      No anti gravity here.

      I think that says more than the article.
      In the past the line was,"There's no such thing as anti-gravity". Now we hear, "It's not anti-gravity because it doesn't work in a vacuum."

      --
      "I can't give you a brain, so I'll give you a diploma" - The Great Oz (blatently stolen sig)
    23. Re:More traditional scientists? by mbourgon · · Score: 1

      [From "Running Scared" with Billy Crystal & Gregory Hines. Set in Chicago.]
      BC: "Repeat, we have left the road - we are pursuing on The El"
      GH: "Don't hit the third rail... it's got 10000 volts running through it."
      BC: "It's not the volts, it's the amps"
      Passenger: "How many amps are there?"
      BC: "Enough to run a ing train! Now shut up!"

      --
      "Sometimes a woman is a kind of religion, she can save your soul & set you free from all your sins" - Bad Examples
    24. Re:More traditional scientists? by JordanH · · Score: 1

      Well, the atmosphere, which mostly moves with the rotating earth, would dampen this tendency a great deal. But, yes, something would tend to move away from the earth as the earth rotates under it.

    25. Re:More traditional scientists? by Electric+Monk · · Score: 0

      There's nothing there that could induce an upward movement if it only "turned off gravity."

      Erm, if you could create an anti-gravity machine and turned it on, assuming that all gravity suddenly gets deflected or whetever, you would appear to fly off in an arc upwards and to the west (if I'm getting this right). This is due to the fact that the earth is not flat (so they tell me), and the only thing that keeps you going round in circles is gravity. Turn off gravity - you go in a straight line at a tangent to your position on the earth at the point at which you turned it off.

      Oh, the reason that these lifters stablise at two feet (or whatever) is that they are typically tied down.

    26. Re:More traditional scientists? by Physics+Dude · · Score: 1

      It's because you can't get "2 amps" running through a person without a few thousand volts behind it! Yeah... just take that 12v battery and TRY to get an amp running through your body with it. ;)

    27. Re:More traditional scientists? by Gaijin42 · · Score: 1

      The US flag on the moon doesn't wave. It is heavily starched, and has wires running through it to hold it out.

    28. Re:More traditional scientists? by lommer · · Score: 1

      Just a couple things:

      Volts seldom occur without Amps

      Actually, it's the other way around, since Volts (or a potential difference) can exist without ANY amps (or current) flowing, yet no current can flow without a driving voltage.

      And btw, I've played with these lifters for some time (I wrote my Extended Essay for my Baccalaureate Diploma on these), and I accidentally shocked myself with the residual charge from my 28 kV power supply after it was switched off. Needless to say, I am still here today, and i got off with no burns, just a sore finger :-). However, had the power supply been on, i'm sure the results would have been much closer to your predictions.

    29. Re:More traditional scientists? by Neurotensor · · Score: 1

      no current can flow without a driving voltage

      My lab has a roll of superconducting wire that says otherwise ;)

      However, had the power supply been on, i'm sure the results would have been much closer to your predictions.

      I've touched a flyback transformer output while it was running, got a couple of burns and fell off my chair (which yanked out the power) but no serious damage even though the current went from one hand to the other (via the chest presumably). It depends a lot on the power output of the supply and the capacitance it's charging. Had that flyback been hooked up to a doorknob cap, I would have done more than fall off the chair (or is that less than fall of the chair? Who knows but it makes for a funny mental image).

  7. NASA Patent by Nom+du+Keyboard · · Score: 3, Interesting
    Last summer, NASA was granted a patent on lifter technology

    Does this mean all US citizens can now use it? Since NASA develops its things with public money I seem to recall that they become available to everyone.

    --
    "It's the height of ridiculousness to say for those 9 lines you get hundreds of millions."
    1. Re:NASA Patent by Anonymous Coward · · Score: 0

      Haha, you wish. Public funding has developed most major technical advances in the last 100 years, which were promptly handed over to private industries. Free market my ass, it's called socialism for the rich.

    2. Re:NASA Patent by jandrese · · Score: 1

      Really? Cool! I've got dibs on the next shuttle ride.

      --

      I read the internet for the articles.
    3. Re:NASA Patent by Anonymous Coward · · Score: 2, Funny

      Haha, you wish. Public funding has developed most major technical advances in the last 100 years, which were promptly handed over to private industries. Free market my ass, it's called socialism for the rich.

      Quit moaning, and drink your Tang.

    4. Re:NASA Patent by BryanL · · Score: 1

      Sure, and there is free seat on a space shuttle waiting for you.

    5. Re:NASA Patent by CordMeyer · · Score: 1

      No. But feel free to build your own space shuttle.

    6. Re:NASA Patent by Bagheera · · Score: 3, Informative

      The ionic thust that "Lifters" use to fly is little different from the ion Xenon Ion propulsion system NASA flew on the Deep Space 1 spacecraft. Details are very different, but the concept is the same.

      1:Create Ions
      2:Accelarate them with across a voltage differential
      3:Get Thrust

      And the obligatory . . .

      4: profit!

      --
      Never attribute to malice what can as easily be the result of incompetence...
    7. Re:NASA Patent by Anonymous Coward · · Score: 0
    8. Re:NASA Patent by BrainInAJar · · Score: 1

      Sure, as soon as the FAA lets me.

    9. Re:NASA Patent by Tassach · · Score: 1

      Sure you can, if you build your own shuttle. The plans (at least the non-classified bits) are (or should be) available via a FOIA request.

      --
      Why is it that the proponents of "one nation under God" are so eager to get rid of "liberty and justice for all"?
    10. Re:NASA Patent by Trevalyx · · Score: 1

      Well, I'm afraid if NASA is involved, we're going to have to skip that last step... They're not so good at the whole "profit" bit. The problem is, they were created in a time where "Throw money at it" was a viable solution to many of the problems of the day, and nearly any expenditure was worth winning the space race. Now they're mired in a financial web so thick it would take years of integration with IRS accountants to get anything straightened out, as NASA can't really estimate costs for anything at all accurately.
      Really what is needed is reform. Or a total departure from the current administration organization entirely. That would take some convincing, I'm afraid.

    11. Re:NASA Patent by Anonymous Coward · · Score: 0
      Last summer, NASA was granted a patent on lifter technology

      And with the recent changes in the law, they'll be able to apply it in Texas too.

    12. Re:NASA Patent by Remus+Shepherd · · Score: 1

      Well, it's slightly different. Deep Space 1 creates thrust by spitting metal ions out with a voltage. This requires a fuel source -- a metal anode that slowly disappears. The good news is that it works in a vacuum.

      The lifter technology ionizes the air around the anode and draws it toward the cathode, creating an ionic wind. This isn't destructive and will run forever as long as current is applied. But it will only run in an atmosphere.

      --
      Genocide Man -- Life is funny. Death is funnier. Mass murder can be hilarious.
    13. Re:NASA Patent by ShavenYak · · Score: 1

      FYI - You might want to be a little more careful with your foam insulation than NASA was.

      --

      Hey kids, there's only 5 days left 'til Yak Shaving Day!
    14. Re:NASA Patent by MacGod · · Score: 1
      Last summer, NASA was granted a patent on lifter technology

      Does this mean all US citizens can now use it? Since NASA develops its things with public money I seem to recall that they become available to everyone.

      Hell yes! That space shuttle they let me use has really cut down my commute time!

      --
      "Reality is merely an illusion, albeit a very persistent one " -Albert Einstein
    15. Re:NASA Patent by hesiod · · Score: 1

      > Quit moaning, and drink your Tang.

      I prefer to EAT tang, and I'm not the one moaning.

  8. old concept by stonebeat.org · · Score: 3, Insightful

    nothing new. this is not anti-gravity. the concept of propelling by ionic wind has been around for a while.

    1. Re:old concept by prockcore · · Score: 2, Insightful

      the concept of propelling by ionic wind has been around for a while.

      Does that somehow make it less cool? Does every american have one in his garage?

    2. Re:old concept by Anonymous Coward · · Score: 0

      Of course it makes it less cool you fucking idiot. We're talking about "application of known science" as opposed to "fundamental breakthrough in propulsion technology". Yes, it's less cool.

  9. Some guy who did an experiment with one by pv2b · · Score: 5, Informative

    A guide to building your own "lifter", sort of

    Perhaps you should build your own? Antigravity?Extraordinary claims require extraordinary proof. A cool toy? You bet.

    1. Re:Some guy who did an experiment with one by Q+Who · · Score: 1

      Extraordinary claims require a proof. Extraordinary proof is a misconception.

  10. Not to flame or anything, but... by Anonymous Coward · · Score: 0

    UFO-looking vehicles that have no moving parts, no onboard power supply, and are capable of levitating simply through the application of high amounts of electrical current.

    The summary of the article provides a very unimaginatively redundent comment. No Power Supply? No moving parts, but has high ammounts of current? That's quite conflictual. Electrons flowing from catheon to anion constitute moving parts, as well as a power supply. Still, I think a perpetual-motion machine would be more intuitive than an anti-gravity machine, for the short term. Anti-gravity machines are too dangerous in a non-contained environment as we have today. Perhaps they should launch a shuttle into outer space and construct a research base on Planet Phobos or Deimos for that matter; that way anything bad happening would happen over there and not here.

    1. Re:Not to flame or anything, but... by phorm · · Score: 1

      Electrons flowing from catheon to anion constitute moving parts, as well as a power supply

      Last time I checked, we didn't classify power-lines as having "moving parts" either though?

    2. Re:Not to flame or anything, but... by Anonymous Coward · · Score: 0

      Learn your terminology. The words are cathode and anode.

    3. Re:Not to flame or anything, but... by nhaines · · Score: 1

      Phobos and Deimos are moons. They orbit Mars. ;)

    4. Re:Not to flame or anything, but... by balaam's+ass · · Score: 1

      Read your own quote. It doesn't say "no power supply," it says no ONBOARD power supply. The power supply is separate from the lifter, and power is delivered via wires.

      (Yea, somebody let me know when these things can at least lift their own power supplies. Until then...)

      And come on, moving electrons don't count as "moving parts"

    5. Re:Not to flame or anything, but... by NotQuiteReal · · Score: 1
      Isn't this a DOOM or Quake reference. I don't remember, I seem to have had as much to drink as the original poster.

      Mod him funny.

      --
      This issue is a bit more complicated than you think.
  11. Hover Conversion, here we come!!! by Eberlin · · Score: 2, Funny

    Maybe we'll be in track to make hoverboards after all. Here I was all disappointed because I was promised flying cars by the year 2000.

    Now, can someone help Dr. Brown with that Flux Capacitor project already? Thanks.

    1. Re:Hover Conversion, here we come!!! by Anonymous Coward · · Score: 0

      You want flying car, well would you do this for it

      http://www.viewaskew.com/tv/leno/flyingcar.html

      yea copy and past that is why i did and to lazy to look up html for that link

    2. Re:Hover Conversion, here we come!!! by Tumbleweed · · Score: 1

      > Here I was all disappointed because I was promised flying cars by the year
      2000

      To paraphrase, "With sufficient thrust, cars fly just fine." :)

    3. Re:Hover Conversion, here we come!!! by BarryHaworth · · Score: 1
      Now, can someone help Dr. Brown with that Flux Capacitor project already? Thanks.

      Never mind the Flux Capacitor, I want the Mr Fusion power pack. With one of those, you'd be able to power a lifter strong enough to do something useful.

      Mind you, using it to power (say) a helicopter would probably be more practical.

      I am a Statistician. One false move and you are a Statistic.

      --
      I am a Statistician. One false move and you are a Statistic
    4. Re:Hover Conversion, here we come!!! by Orne · · Score: 1

      Hmm... So you're on your hoverboard, riding on a wisp of air ionized at 40,000 Volts. Gots to suck when you go to dismount, with one leg on the board and the other on ground....

      (see aforementioned comment about the value of wearing rubbers)

    5. Re:Hover Conversion, here we come!!! by GnarlyNome · · Score: 1

      Here ya go your flying ? car
      http://www.artcars.com/Aerocar/cover.html

      --
      Diplomacy is the art of saying "Nice doggie" until you can find a rock. Will Rogers
    6. Re:Hover Conversion, here we come!!! by Anonymous Coward · · Score: 0

      Your leg isn't nearly as good a conductor as the ionized air, even if you're barefoot.

  12. Cold Fusion by Nom+du+Keyboard · · Score: 4, Funny
    "This is bigger than cold fusion!" one businessman told me jokingly.

    Everything is bigger than cold fusion.

    --
    "It's the height of ridiculousness to say for those 9 lines you get hundreds of millions."
    1. Re:Cold Fusion by Eberlin · · Score: 2, Funny

      Someone explain that to Macromedia and the Allaire brothers.

      CFTRY not. Do or do not. There is no CFTRY

    2. Re:Cold Fusion by scotch · · Score: 1

      That's probably where the "jokingly" part comes in.

      --
      XML causes global warming.
  13. Re:Official ENGINEER postal flip out! by Fishead · · Score: 2, Funny

    What? A Geocities site taking the full brunt of slashdot? Not likely.

  14. Anti-gravity devices by pv2b · · Score: 5, Funny

    The concept of "defying gravity" by generating an upward force larger than the force of gravity pulling the object down is indeed very exciting.

    May I interest you in a Boeing 747?

    1. Re:Anti-gravity devices by wass · · Score: 2, Funny
      May I interest you in a Boeing 747?

      No, a 747 needs to go horizontal at air-speed velovity to generate enough lift to "defy gravity".

      I want something that can go straight upwards. Did anybody patent the helicopter yet?

      --

      make world, not war

    2. Re:Anti-gravity devices by AtrN · · Score: 1

      It doesn't have to be larger. I have plenty of anti-gravity devices. I'm sitting on one right now.

  15. C'mon by Faust7 · · Score: 5, Funny

    a grassroots movement of antigravity fans

    Damn, man, just say geeks.

    1. Re:C'mon by Anonymous Coward · · Score: 0

      Yes, geeks who are a bit short on science but long on science fiction.

    2. Re:C'mon by Anonymous Coward · · Score: 0

      >>>>a grassroots movement of antigravity fans
      >>
      >>Damn, man, just say geeks.

      No, not geeks. Crackpots.

    3. Re:C'mon by SagSaw · · Score: 1

      a grassroots movement of antigravity fans

      Somehow I get the feeling that these geeks will be remainging close to grass roots for a very long time.

      --
      Come test your mettle in the world of Alter Aeon!
    4. Re:C'mon by Anonymous Coward · · Score: 0

      a grassroots movement of antigravity fans

      Damn, man, just say geeks.


      Oh please, that just wouldn't be geeky enough.

    5. Re:C'mon by ForemastJack · · Score: 1

      a grassroots movement of antigravity fans
      Damn, man, just say geeks.

      Or "Baywatch" fans.

  16. The *short* story by 3ryon · · Score: 5, Funny

    We can levitate almost a pound using an ion wind created by 120,000 volts. Strikes me that you could send a pound half-way around the earth using 120,000 volts and a rail gun.

    Anyone else think Wired authors get paid by the word, with no maximum?

    Sorry for the lame reply, I was trying to think of something witty just so I'd get modded up and the right person would read my sig. :)

    1. Re:The *short* story by DShard · · Score: 1

      Anyone else think Wired authors get paid by the word, with no maximum?

      Many, Many times....

      and the right person would read my sig. :)

      Thank god I turned those off months ago...

    2. Re:The *short* story by Zebbers · · Score: 1

      cant see sigs sorry!

    3. Re:The *short* story by kylemonger · · Score: 1

      Anyone else think Wired authors get paid by the word, with no maximum? Yah, even for Wired this article reached a new low in tech content per page of copy. This story could have been summarized in a hundred words and saved us all a whole lot of time.

    4. Re:The *short* story by MrWa · · Score: 1

      Is that phone number going to get slashdotted now? Wouldn't that make you sorry for posting a lame reply and asking to be modded up? :-)

    5. Re:The *short* story by LDoggg_ · · Score: 2, Funny

      Looks like there's only about 26 US area codes that end in 2.
      Anyone want to give Bryon a call in a sexy Wendy voice?

      202 212 252 262
      302 312 352 402
      412 502 512 562
      572 602 612 622
      662 702 712 732
      802 812 832 912
      952 972

      --

      "If they have both, tell them we use Linux. And if they have that, tell them the computers are down." -Dave Chapelle
    6. Re:The *short* story by 3ryon · · Score: 1

      Hmmm...it hadn't occurred to me that the 2) might be considered the last number in the area code. It's the first. I guess I can use that as an excuse if she doesn't call me.

    7. Re:The *short* story by uberdave · · Score: 1

      Umm... We use the same phone number format in Canada. It is also used in Bermuda, and many Caribbean nations, including Anguilla, Antigua & Barbuda, Bahamas, Barbados, British Virgin Islands, Cayman Islands, Dominica, Dominican Republic, Grenada, Jamaica, Montserrat, St. Kitts and Nevis, St. Lucia, St. Vincent and the Grenadines, Trinidad and Tobago, and Turks & Caicos. Since there is nothing in his post to indicate that Byron was in the States. You need to broaden your area code list, because it is missing a few:

      242 Bahamas
      902 Nova Scotia

      also missing:
      432 Texas
      682 Texas
      772 Florida
      862 New Jersey

      572 and 622 are reserved for future use, so don't bother with them.

    8. Re:The *short* story by phunhippy · · Score: 1

      572 and 622 are reserved for future use, so don't bother with them.

      Maybe he is from the future!

    9. Re:The *short* story by Muffhead · · Score: 1

      Well you won't find a 632 number in Bermuda, so that rules out the 441 area code.

  17. tricky by lingqi · · Score: 4, Insightful

    The thing with testing lifters and their operation is this problem, if i understand right:

    the easiest way to verify if the lifter lifts via ionic wind is by using the lifter in a vaccum, but while the lifters work ok in normal atmospheric pressures, when you begin to decrease the pressure of where the lifter operate (putting the contraption in a pumped area, say) would eventually cause too much corona discharge to happen and do a lot of bad things (lower dielectric constant for vaccum compared to air?).

    so, in any case - ion wind or not, this technology is still not quite suitable for space just yet. (i mean, besides the fact that you need a relatively heavy powersupply for this to get going)

    --

    My life in the land of the rising sun.

    1. Re:tricky by A55M0NKEY · · Score: 2, Informative
      Lifters are a glorified ionic breeze. No doubt about it. The lifter they tested in a vacuum didn't budge.

      Having said that, I thought it was interesting how they mentioned that the top wire of a lifter vibrated like a guitar string, arcing when it approached the tin foil part. With that vibration and arcing in sync with the vibration couldn't a lifter be considered a capacitor? If it is then would the mass of the vibrating top wire fluxuate because of the Woodward effect, possibly causing a net upward force? ( the wire's mass would increase as the 'capacitor' was being charged as the wire vibrated upward and would decrease once it arced. )

      Just an idea. Prolly lifters ARE nothing but glorified ionic breezes...

      --

      Eat at Joe's.

  18. Re:Official ENGINEER postal flip out! by Anonymous Coward · · Score: 0

    There's always HerrGoogleCache

  19. anyone worked out the amount of power/lb? by shoestring · · Score: 4, Interesting

    Anyone look at the power/pound?
    Let's see.. 27000 V, 20 microamp, for 3 millipound.. think that works out to something like .54 Watt. .54 W/ .003 lb = 180 W/lb..
    Anyone know how this compares to say
    "normal" engines?
    Seems to be a really good battery, unless you have a tether (or beamed power).

    1. Re:anyone worked out the amount of power/lb? by bobbozzo · · Score: 1

      I would suspect a fan (or electric helicopter or hovercraft) could lift a pound with less than 180w. Of course, you'd have to count for the weight of the fan and motor, but make it big enough and you should be OK.

      --
      Nothing to see here; Move along.
    2. Re:anyone worked out the amount of power/lb? by RedWizzard · · Score: 2, Insightful

      My Mitsubishi 3000GT's engine generates 179kW to push around a 3200 pound car, about 56 W/lb. Of course it doesn't fly (by design).

    3. Re:anyone worked out the amount of power/lb? by Rhinobird · · Score: 1

      Do a google search for "ionocraft". These things are way old. Anyway, ionocraft are exactly what these lifter things are, and one article I ran across said these things compare favorably to helicopters, but not to regular aircraft. But i think that was before they took into account the powersupply. These things suck power and their supplies are large and bulky, and there really isn't any wa around that. Well, I think that NASA guy has a good idea. You could just beam the power to it. If you know the op0erating parameters antennas can be very efficient, you could keep all the bulky power generation on the ground and use a microwave beam to power the craft. How cool would THAT be?

      --
      If Mr. Edison had thought smarter he wouldn't sweat as much. --Nikola Tesla
    4. Re:anyone worked out the amount of power/lb? by Anonymous Coward · · Score: 0

      I can power a 60W 115VAC light bulb on the stationary cycle by biking at top speed. I could maintaint light for 30 seconds. To lift the thingy, I would need three of me, so its 1/3 as efficient as a light bulb, which is only just another form of heater.

    5. Re:anyone worked out the amount of power/lb? by HerbalSpiderMonkey · · Score: 1

      If, power wise, it compares reasonably to existing engines, then there is an application for it. Ever heard how much noise a helicopter or a jet makes?

      I'm sure the military would enjoy a nearly silent VTOL aircraft.

    6. Re:anyone worked out the amount of power/lb? by rrrrrick · · Score: 1

      If they had it they would stick big lcd display on it and fly around pretending to be a UFO.

      --
      aiai aaia aiai aaia aiai aaia aii i iai iai iai iai iai ii aiai aia
  20. amps kill, volts are fun by GunFodder · · Score: 4, Informative

    My physics teacher in high school had a high voltage generator called "sparky". He could crank out 100,000 volts with that thing. Then he passed electrodes around and allowed us to experience 100,000 volts firsthand :) The reason this didn't kill anyone is that volts are not necessarily dangerous; amps do. The amount of current flowing through your body determines whether electricity is harmful.

    Case in point: in the US power mains run at 120 volts. Yet this is enough to kill you. The reason is that there are tens of amps available at the wall.

    1. Re:amps kill, volts are fun by dnoyeb · · Score: 4, Informative

      10 volts is enough to kill you if applied directly to your heart. its all about resistance. your hands and feet provide a longer path and thus more resistance. more resistance means more volts are needed to get the same current. if you put on rubber gloves, then a LOT more volts will be needed since thats MUCH higher resistance. But of course lightning laughs at your puny rubbers.

    2. Re:amps kill, volts are fun by A+Bugg · · Score: 1

      i hope that last sentence wasn't a jibe at his dick size.
      a bugg

    3. Re:amps kill, volts are fun by dirkdidit · · Score: 4, Funny
      But of course lightning laughs at your puny rubbers.

      That's why I use Trojan (TM) brand rubbers to protect myself in all those "sticky" situations, especially the ones that cause me to exert large amounts of energy.
    4. Re:amps kill, volts are fun by Anonymous Coward · · Score: 0

      Mod this (-2, Darwin). Fucking around with fire, and electricity are all great ways to create a memorable obituary.

      (Disclaimer: This does not apply to people who tinker AND do not advocate sticking things in wall sockets)

    5. Re:amps kill, volts are fun by tzanger · · Score: 5, Informative

      Actually it's more about AC vs DC than it is about voltage potential. I very seriously doubt any human would survive a hundred thousand volts DC at practically any current. AC gives you this wonderful thing called skin effect which means that the vast majority of the voltage is flowing through the dead skin covering your body.

      It's true that "Volts Jolt, but mils (Amps) kill," but there's more to it than that.

    6. Re:amps kill, volts are fun by RALE007 · · Score: 1

      Oh yea P.S., US power mains don't run at 120v, the power within your house does. The voltage within your house has been stepped down numerous times since it left a power main. Power mains run in the tens (and hundreds?) of thousands of volts range. There's a lot of cool information on electricity at www.howstuffworks.com, I recommend reading it to all.

      --
      Beware blue cats moving at .99c
    7. Re:amps kill, volts are fun by scrod · · Score: 0
      If you are touching the metal without any type of protection (rubber gloves etc.), you'll get a nice jolt

      Yes, and try touching it with wet or damp hands. Your resistance decreases significantly and that jolt could be lethal.
    8. Re:amps kill, volts are fun by Anonymous Coward · · Score: 0
      Speaking of rubbers, I asked my girlfriend if she smokes after sex.

      She told me she didn't know - she never looked down to see.

    9. Re:amps kill, volts are fun by gantrep · · Score: 1

      The positive and negative of an AC wall socket? What kind of idiot are you? Oh yeah, the kind that thinks it's fun to shock himself with 120v AC.

    10. Re:amps kill, volts are fun by Beryllium+Sphere(tm) · · Score: 1

      Didn't you ever get zapped by a Van der Graaf generator when you were in school? Hundreds of kilovolts.

      Skin effect is real but it's more of a radio-frequency concept.

    11. Re:amps kill, volts are fun by ProKrypt · · Score: 1

      Have you ever tried licking a 9 volt battery on the terminals? Well, I have... and it was fun! (shocking fun!)

      --
      -ProKrypt
    12. Re:amps kill, volts are fun by Lord_Dweomer · · Score: 2, Funny
      " That's why I use Trojan (TM) brand rubbers to protect myself in all those "sticky" situations, especially the ones that cause me to exert large amounts of energy."

      And exactly which situations cause you to exert large amounts of energy? Using Opera's Gesture Commands?

      --
      Buy Steampunk Clothing Online!
    13. Re:amps kill, volts are fun by GnarlyNome · · Score: 1

      6 Volts @ 14 Ma under ideal conditions can kill you..well i guess they wouldn't be ideal for you

      --
      Diplomacy is the art of saying "Nice doggie" until you can find a rock. Will Rogers
    14. Re:amps kill, volts are fun by seibaby · · Score: 1

      Skin effect does not, AFAIK, apply to humans. We're not solid metal conductors, you know, we have things like blood vessels and nerve threads that are way better conductors than dead skin.

    15. Re:amps kill, volts are fun by trumpetplayer · · Score: 1

      Skin effect is absolutely negligible at 60 Hz, in other words, skin depth is quite big in that freq range. And it's not real skin, OK? Descriptions here and here..

    16. Re:amps kill, volts are fun by Anonymous Coward · · Score: 0

      Unless you're poking electrodes THROUGH your skin, though, you'll need an awfully high voltage before your blood vessels and nerves get into the picture.

      Which reminds me of a (probably apocryphal) story of a guy who committed suicide with a digital multimeter and a 9V battery. He pushed an electrode into the vein in each wrist with the meter set to measure resistance. The path of least resistance went right through the heart, and enough current passed through to stop it.

    17. Re:amps kill, volts are fun by wiredbuddy · · Score: 1

      That was 100,000 volts with NO LOAD. Your body resistance loaded down the power supply and it was no longer 100,000 volts (probably 10's of volts). Take a 9V and 2 1.5 V batteries and put them in series. You now have 12 volts. Hook that up to your car and try to start it. Nothing will happen because the starter will load down the 12V to almost 0V. A battery can be modeled by an ideal voltage source (one that can put out infinite current) in series with a resistor. The difference between the above mentioned 12V battery and your car battery... the value of that resistance (100's of ohms in the first case, 10's of thousanths in the second).

    18. Re:amps kill, volts are fun by Anonymous Coward · · Score: 0

      Well, if you read this hilariously disgusting urban legend old nominee for the Darwin Awards, then you might not think that to be such good protection anymore.

  21. May this is too obvious... by thepacketmaster · · Score: 0, Redundant

    Hasn't anybody tried to put this into a vacuum chamber to see if it still works? I think that would pretty much settle it.

    --

    --

    Luck is just skill you didn't know you had.

  22. I wonder if by Rooked_One · · Score: 1
    Ok, remember that movie, "Ocean's Eleven?"

    I think I would probably cover my netherregions with something like this also.

  23. missing link on gravity by geekmetal · · Score: 1
    Are lifters - as debunkers claim - a mere physical hack, a trick of pushing air fast enough to float a toy? Or could this actually be evidence of Einstein's dream, the missing link between gravity and electricity?

    The missing link between gravity and electricity, that sounds very interesting! Anyone having links to more information on that work please post it here.

    --
    There are two kinds of egotists: 1) Those who admit it 2) The rest of us
    1. Re:missing link on gravity by Jerf · · Score: 3, Informative

      That's probably a reference to the Grand Unified Field Theory, the Holy Grail of particle physics where all forces are reduced to various aspects of one force.

      Once upon a time, electricity and magnetism were thought to be different forces. Now we know they are two aspects of the same thing. Later it was found at high energy states the nuclear weak force and electromagentism were also two aspects of the same "electroweak" force. I'm not a physicist but IIRC they've also shown how the nuclear strong force (holds atoms together) is the same.

      The force that refuses to be unified is gravity. It still remains a seperate term in all theories. It is hoped that by pushing particle accelerators to higher and higher energy states, enough clues will be given to piece together the relationships once and for all.

      However, the link will not be found at room temperature and mere thousands of volts; we're talking millions of degrees, you know, the kinds of temperatures where us mere mortals stop caring which scale it's being measured in, and densities that would make a neutron star green with envy. Basically, barring Extraordinary Evidence, the line that so intrigued you is indicative of the ignorance of the writer, not an interesting phenomenon.

      However, if you find this interesting I would encourage you to go ahead and learn about real particle physics; it boggles my mind why people enjoy various tin-hat conspiracy-type theories about physics when the real thing is so much richer and more fascinating then any man-made fiction could ever be. Like I said, I'm not a physicist but I enjoy laymen-level particle physics and cosmology and would love to learn more about it sometime in a context where nobody was forcing me to turn in homework ;-)

      By the way, on the topic of the GUT, go here and grab this sound file... it won't be much more informative overall then this post but it will be much more fun.

    2. Re:missing link on gravity by mpthompson · · Score: 1

      I enjoy laymen-level particle physics and cosmology and would love to learn more about it sometime in a context where nobody was forcing me to turn in homework ;-)

      You may be interested in The Teaching Company. They offer the lecture component of college level courses on audio tape, video tape and/or DVD. I've bought a couple of physics and astronomy courses on DVD and enjoyed them very much. They do a good job of selecting professors from top universities to lecture and a lot more material is covered in a 20 to 40 hour course than can ever be seen in a 1 hour PBS or Discovery Channel documentary.

      You can get the courses as very reasonable prices (around $60-$80 on DVD) if you wait for their inventory clearance sales that seem happen twice a year or so.

      I'm not affiliated with The Teaching Company in any way, just a happy customer.

  24. Outrage!... by piecewise · · Score: 1

    Yeah.. I am SO sick of these pesky engineers always *claiming* to have developed power-independent hovercraft-like levitating vehicles with no moving parts, when all they're doing is harnessing the power of ionic winds! Sheesh!

    Hats off to NASA for stopping this ridiculous claim and setting the truth straight!

    --
    The next comment I write will be ready soon, but subscribers can beat the rush and see it early!
    1. Re:Outrage!... by hpa · · Score: 4, Insightful
      You know... the thing that's really annoying is that the article, after noting the bogosity of the "new physics" claims, pretty much implies that "it can't work, but it does."

      There is no new physics here, but perhaps new technology. All propulsion technology is really rehashes of the same old laws of physics, but that doesn't mean we have even begun to scrape the surface of what can be done with it. Ion-wind "lifters" (working in atmosphere) could very well become useful, especially in conjunction with ion rockets (which work in space.)

    2. Re:Outrage!... by Anonymous Coward · · Score: 0

      I agree...sounds like NASA is pushing alot of ionic hot air.

    3. Re:Outrage!... by piecewise · · Score: 1

      Yes.. thank you for replying to my thread and rephrasing it into a longer message. I uhh, completely agree with you, therefore. :-)

      --
      The next comment I write will be ready soon, but subscribers can beat the rush and see it early!
  25. Re:Official ENGINEER postal flip out! by Anonymous Coward · · Score: 0

    Remember, you can't spell GEEK without "EE"!

  26. Are these available to buy? by imadcow1 · · Score: 1

    Is there anyway that one could buy one of these, or could one build it his or herself?

    1. Re:Are these available to buy? by pv2b · · Score: 1

      Yes, see my karma whore post.

    2. Re:Are these available to buy? by imadcow1 · · Score: 1

      Too bad none of the PDF files work. Do you havea mirror of it?

  27. Re:Vacuum operation by eclectro · · Score: 1


    RTFA. That's what they did. It doesn't work in a vacuum. It's ion wind.

    --
    Take the cheese to sickbay, the doctor should see it as soon as possible - B'Elanna Torres, "Learning Curve"
  28. Why these, why now? by jfabermit · · Score: 5, Informative

    A good article, but there is a very good reason why most physicists tend to be extremely skeptical about claims like this. The voltages used by lifters may be large, but don't push the limits of modern technology in any way, shape or form. If strange anti-gravity phenomena happened for 10's of kV, we'd have seen the phenomena in a number of different places. Physical laws, as best we can tell, are universal, and they have many, MANY situations where they apply. It is extremely unlikely that these contraptions encounter high voltage antigrav phenomena, and no other high voltage machine we know of does. BTW, I know Rai Weiss, and he is certainly kinetic, but hyperkinetic might be a bit of a stretch. Definitely a world-class physicist, too, one whose calculations you should generally take seriously.

    1. Re:Why these, why now? by phritz · · Score: 1
      BTW, I know Rai Weiss, and he is certainly kinetic, but hyperkinetic might be a bit of a stretch.

      Actually, the word used in the article is 'hyperactive', which is more accurate. (I worked with him at LIGO Hanford a summer a few years ago) He gives off an aura of being EXTREMELY fast on the uptake and very very sharp, which is probably what the author was trying to articulate.

  29. UFOs? by Eevee · · Score: 1

    Someone needs to tell the writer of the article that UFO stands for Unidentified Flying Object. I'm fairly sure that even someone from Wired should have been able to identify each one.

    Of course, interviewing the guy who built it would be a dead giveaway for almost anyone else.

  30. /. editors got fresh copy of Wired by Anonymous Coward · · Score: 0

    Last month there were 7 stories from the magazine. How many are going to be this month?
    Someone discovered convinient way to fill in the slow days I presume.

  31. Better picture. by Nathdot · · Score: 0, Offtopic

    You can find a better picture of the antigravity machine here!

  32. airplanes and other uses by 73939133 · · Score: 4, Insightful

    while more traditional scientists - including some funded by NASA - view them as nothing more than contraptions harnessing ionic winds.

    Yes, and airplanes are nothing more than contraptions harnessing aerodynamic lift, and the people who designed them originally also didn't fully understand the physics involved. If "ionic wind engines" can be made practical and acceptably efficient, they might give rise to a new class of airborn vehicles.

    And perhaps there are other uses as well. For example, electric fields and magnetic currents might be useful for shaping and redirecting the hot air that occurs during reentry from space. Or, the same technology might find uses not for pushing around large amounts of air for propulsion, but instead for changing the properties of the thin layer of air right above the surface of a traditional plane or vehicle--this could perhaps be used to reduce turbulences and improve performance.

    1. Re:airplanes and other uses by pauldy · · Score: 1

      Some of your suggestions for the application of this technology are interesting and I don't think any one doubts that this is an interesting phenomena. I think any sane person would protest to the way these charlatans are presenting this information as it misleads people and is deliberately aimed at bringing in people who will invest money in something that will never come to fruition. Its deceptive and wrong to call these devices anti gravity or purport their lifting capabilities when if you ever build one you will find it is delicate enough to get them to lift themselves.. We may actually one day have a device that blocks and redirects gravity. This device certainly is not it and I think that is why many technical people are looking at it with such dismay.

      If you find this technology to be so applicable to air travel then drop me a line and for only $500k I can show you how to build a machine that you can plug into your wall outlet and get paid for using electricity by your electric company. Yes, you too can generate electricity in your washroom and feed it directly back into the grid.

    2. Re:airplanes and other uses by sploxx · · Score: 1

      Yes, and if there are enough "ion airplanes" flying in the air, the worlds gets a massive ozone problem.
      Not too less ozone, no, too much.

      Have you ever played with HV? Then you should know that the generated ions recombine with oxigen and nitrogen to form NOx (nitrogen oxide, toxic) and O3 (ozone, highly toxic). E.g. your laser printer generates that stuff.

  33. Irresponsible Post by nametaken · · Score: 5, Funny


    Why would you post this? You know how many /.'ers are going to electrocute themselves in the next couple days?? (likely, myself included)

    1. Re:Irresponsible Post by Anonymous Coward · · Score: 0

      Survival of the fittest. We're just thinning the herd a little.

    2. Re:Irresponsible Post by Anonymous Coward · · Score: 0

      Darwin days.
      Like this

    3. Re:Irresponsible Post by FurryFeet · · Score: 1

      Yay! Let's Slashdot the E.R.s!!!

  34. Complete bogus by fpp · · Score: 5, Interesting

    James Randi, the famous skeptic, has this to say about this subject (http://www.randi.org/jr/060702.html):

    "Go take a look at http://www.americanantigravity.com/index.html and see very interesting videos of what the supporters seem to believe is a breakthrough in science. If this device is "antigravity," then a pogo stick and a crow are both antigravity items, as well.

    I saw a similar demo at the University of Toronto back in 1946. That demo used a flat circular coil of wire; I believe this is the same thing, but a triangular form leads one away from the "induction" conclusion. It's a matter of high-voltage electrical fields generated by something that you don't see in the videos; there's always a source of high voltage present, a CRT (computer monitor or TV receiver) or a HV power supply, just out of camera view. What's also not obvious here is that the triangular frame -- which weighs only a few grams -- is tethered down by very fine invisible threads, a fact which when known, makes the apparent "maneuvering" appearance less mysterious by far."

    1. Re:Complete bogus by August_zero · · Score: 2, Interesting

      Sometimes I like Randi, while there are a lot of whackos out there willing to beleive anything without being able to produce a grain of proof its nice to see that there is someone just as whacko coming at the subject from the opposite direction.

      And then other times, he proves himself to be just as blind and arrogant as the people he seeks to debunk when he makes snap statements and dismisses without properly investigating first. While he is right in the long view, his reasoning as to why its wrong, is flawed.

      --
      On Wall Street they say "buy low, sell high" On the pad we say, "buy high, sell high" Isn't that somehow better?
    2. Re:Complete bogus by swtaarrs · · Score: 1

      If you had actually read the article, you would see that what Randi is complaining about is true and the lifter geeks admit to it and it's pretty obvious why they need these things (if you read the article)...

    3. Re:Complete bogus by Walt+Dismal · · Score: 1

      I believe that in Area 51 they have alien pogo crows. These are an offshoot of alien MST3K technology.

    4. Re:Complete bogus by Physics+Dude · · Score: 1

      A very accurate assessment. I used to be more a fan of Randi, until I started reading the articles on his site and realized how extremely biased and unobjective he really is at times. Seeing him pushing statements that don't follow from logic or rational argument, it's fairly easy to see where his preconceptions and biases lie. Such a shame.

  35. Lifters are antigravity devices. by Anonymous Coward · · Score: 1, Funny

    Lifters are antigravity devices. I am convinced of this. How do I know this, you may ask? Well, I could cite the numerous experiments carried out by other crackpots that show how lifters do not require an atmosphere. I won't do that, though. I know that lifters are real antigravity devices because the UFO that abducted me was powered by lifters.

  36. IN SOVIET RUSSIA by Anonymous Coward · · Score: 0

    Communists beat YOU at chess!

    Oh wait...

  37. The Worldwide Lifters replications Log Book by Anonymous Coward · · Score: 0
  38. These things are so cool! by be-fan · · Score: 4, Interesting

    When my friend first showed me the site, I thought it was a hoax. He bitched about it enough that we decided to build some at school. We opened up some monitors to use as 25,000 volt power supplies, and wired one up using very thin wire and balsa wood. The damn thing flew alright. Power-to-weight ratio sucked, though. The thing was hooked up to a monitor (don't know much it was actually dissipating) but could only lift about its body weight (2 or 3 grams for our model). The nifty thing about it is that while we were working on it, we left it in the robotics lab labeled "Anti-gravity machine, do not touch!"

    PS> If you try this at home, remember, high voltages arc very easily! One of the times we tried it, there was a class in the lab at the time. One guy was so fascinated that the electric charge in the wires made the hair on his arm stand on end that he got a little too close :)

    --
    A deep unwavering belief is a sure sign you're missing something...
  39. Re:Vacuum operation by Chairboy · · Score: 4, Funny

    The real missing experiment is the one where we see what happens when you bother to read the article first.

    Once equipped with the fantastic knowledge that they did, in fact, perform that experiment, I anticipate great things from you! Your blinding grasp of the obvious and your brave decision to criticize something you didn't read suggest that there are many exciting truths just waiting to pounce from your mouth!

  40. harnessing ionic winds by djupedal · · Score: 4, Funny

    ...or, as it is known in most border towns in Texas...."fffrrrriiipppp!!! Damn, Roy...that was SOME good chili!!

    1. Re: harnessing ionic winds by Anonymous Coward · · Score: 0

      Ionic? That damned column was corinthian!

  41. The only way to fly by nounderscores · · Score: 2, Interesting

    And we also know how those sparky engines on the Logos and the Neb, and the hovercars and nuclear/dark storm bombers in the second renaisannce work.

    Pretty neat. All you need is an abundant source of energy.

  42. Ionic wind - a simple test by ka9dgx · · Score: 1
    Why doesn't someone simply put one of these puppies in a thin plastic bag (like the ones that your Dry Cleaned Garments come home in)?

    You only need to test it for a few seconds, so heat shouldn't be a real issue. Inflate the thing if you need to keep the edges away from the HV.

    Why hasn't anyone tried it?!?!?!

    --Mike--

    1. Re:Ionic wind - a simple test by PhuCknuT · · Score: 1

      They have, and it's not proof of anything. If the bag is big enough, the device will just fly within the bag. If the bag is tight around the device, the electric fields will just go right through it and create the ion wind outside the bag, lifting the bag too (if it's not too heavy).

    2. Re:Ionic wind - a simple test by ka9dgx · · Score: 1
      If it lifts both itself, and the bag off the ground, there is probable cause to suspect that it's not airflow alone doing the lift. If it's done inside an aluminized mylar bag, not touching the ground, then you know it's not airflow, nor ion wind of any type.

      --Mike--

  43. If i hear one "brakeing thermo" comment.. by sjwt · · Score: 1

    Im goign to slap who ever says it...

    By "no on borde power" they meen these
    divices are hocked up to either batterys
    that weight in excess of 100 magnites times
    there own weight or the mains power supply!!

    ive seen these flyers used as a "law of thermo
    is brakeable" way too many times..

    --
    You have 5 Moderator Points!
    Which Helpless Linux zealot/MS basher do you want to mod down today?
    1. Re:If i hear one "brakeing thermo" comment.. by Anonymous Coward · · Score: 0

      (Score:-1, Spelling Makes CmdrTaco Look Like Noah Webster)

  44. What's with the wired-slashdot thing? by Thinkit3 · · Score: 2, Funny

    I've even heard slashdot mentioned in wired. Are they just united in technolibertarianism or something? Or like owned by the same company? Does a single month go by without a wired magazine story ending up on /.?

    --
    -Libertarian secular transhumanist
    1. Re:What's with the wired-slashdot thing? by Anonymous Coward · · Score: 0

      Its kind of like how Time magazine always manages to get some sort of Christian icongraphy on the front of their magazine every few issues.

  45. Re:Official ENGINEER postal flip out! by Anonymous Coward · · Score: 1, Funny

    Remember, you can't spell sex with EE.

  46. Maybe this is too obvious... by Anonymous Coward · · Score: 0

    Haven't you tried reading the article to see if they answered this? I think that would pretty much settle it.

  47. Spacecraft power suppy problem solved! by zerofoo · · Score: 3, Interesting

    Hey it's in the article:
    no onboard fuel

    And it's in the slashdot blurb:
    no onboard power supply

    What they don't say is that this sucker is electrical.....so to make this thing fly 2.6 million light years, you need 2.6 million light years of extension cord.

    Oh yeah, you need atmosphere too.

    Nifty, but useless.

    -ted

    1. Re:Spacecraft power suppy problem solved! by Idarubicin · · Score: 1
      What they don't say is that this sucker is electrical.....so to make this thing fly 2.6 million light years, you need 2.6 million light years of extension cord.

      Oh yeah, you need atmosphere too.

      Not strictly true. You could do all your acceleration inside the atmosphere, and coast the rest of the way. Then you only need a hundred miles or so of extension cord.

      Of course, the...ah...difficulties that this presents for craft and crew are left as a delightful thought experiment for craft and crew. (Hints: *blam* *squish*)

      --
      ~Idarubicin
    2. Re:Spacecraft power suppy problem solved! by ShieldWolf · · Score: 1

      >>..so to make this thing fly 2.6 million light years, you need 2.6 million light years of extension cord.

      Wrong.

      There are these nifty little things called PROTONS which can travel vast distances without wires, you may have heard of them. These devices could be powered by microwave installations on the ground, which, I believe, is what they are suggesting.

      --
      just = (My)Opinion.toCents();
  48. This was in Popular Science years ago by Pvt_Waldo · · Score: 5, Informative

    I remember reading about this technology in Popular Science oh - back in the late 60's or 70's? It was clearly pitched as Ionic at the time - and the problem at the time seemed to have been how to carry the power supply around.

    1. Re:This was in Popular Science years ago by nametaken · · Score: 1


      ...and so it remains, 40 years later.

    2. Re:This was in Popular Science years ago by Anonymous Coward · · Score: 0
      Pretty soon they'll be beating people, too!

      Checked your teledildonic technology recently?

    3. Re:This was in Popular Science years ago by AndroidCat · · Score: 1
      Late 50's, early 60's. There were plenty of Dick Tracy style electrofan gizmos. (I'm not sure how the sci-fi Dick Tracy strips of the mid-late 60's fit in with Dick Tracy canon, but that's what the papers ran.) The power cord was usually a problem. :^)

      Somewhere, I've still got the solar-pumped Stirling engine plans from a '65 issue. Even then, I could tell the difference between engineering and shinola.

      --
      One line blog. I hear that they're called Twitters now.
    4. Re:This was in Popular Science years ago by MoonRabbit · · Score: 1

      My parents had Popular Mechanics dating back to the 1930's that I used to read as a kid. I remember seeing articles on ion-powered aircraft from the 1940's, right alongside the articles about how everyone would have a helicopter in their garage by 1970.

    5. Re:This was in Popular Science years ago by scharkalvin · · Score: 1

      It was also in the world book encyclopedia. I remember a science project in there called an "ionic rocket engine". It had three metal rods with balls at one end and the other end was sharpened to a point. Each rod was enclosed in a plastic tube. All three rods were connected to a high voltage power source and were suspended from a support by the power feed wire. The power supply was pulsed which caused the 'rocket' to swing back and forth.

    6. Re:This was in Popular Science years ago by cr0sh · · Score: 1
      Somewhere, I've still got the solar-pumped Stirling engine plans from a '65 issue. Even then, I could tell the difference between engineering and shinola.

      I hope you are referencing the "electrofan gizmos" with this line, and not the Stirling engine - solar-powered stirling engines do run, my uncle had one that he had bought through Edmund Scientific, that he ran in his backyard for me once (he was a curious man - loved science and religion - hated margarine, said it tasted like oleo - built his own wind generator and solar water heating system for his house)...

      --
      Reason is the Path to God - Anon
    7. Re:This was in Popular Science years ago by AndroidCat · · Score: 1
      No worries, Stirling engines are definitely engineering as opposed to electrofan shinola. I'm sure that issue is in there somewhere, maybe behind those 1976 Bytes...

      Your uncle seemed quite a character. And that's a good thing!

      --
      One line blog. I hear that they're called Twitters now.
    8. Re:This was in Popular Science years ago by Gaijin42 · · Score: 1

      Uh oleo is a brand name of margarine...

    9. Re:This was in Popular Science years ago by cr0sh · · Score: 1

      I have always understood that true oleo was basically the "first" form of margarine - it was a white, salted crisco-like compound, very unlike what we know today as margarine. It supposedly was just this side of pallatable (as compared to real butter, which most people at the time - 1930s-1950s - were used to). I don't know what real percentages were, but my uncle was in the portion of people who hated it, and never would try margarine again until he died (8 years ago). He always insisted on real butter. I tend to think that he tried oleo because he was so interested in science and technology (just like we geeks today try crazy food and such that come out "new"), and was turned off by the whole idea of "fake butter" or "butter replacement" as a result - and from then on, only would eat the real stuff...

      --
      Reason is the Path to God - Anon
  49. Re:Official ENGINEER postal flip out! by Anonymous Coward · · Score: 0
  50. Antigravity devices. (mod up AC funny, really) by pr0ntab · · Score: 1

    Also, they put me on these stairs, only I didn't have to do anything to climb them. Instead, the TOP came down to ME.

    Truely amazing.

    Later, they must have dropped me off in the mall because I woke up in the bathroom next to the Orange Julius.

    --
    Fuck Beta. Fuck Dice
  51. The cure for cancer is found! by Chad+E+Dirks · · Score: 1

    "Bill: "If you concentrate on the gallstones, they get fixed in existence, and it's harder for them to wink out. It makes them easier to operate on." Doug: "Wow!")"

    Have cancer?

    Just stop thinking about it!

    How did it get there in the first place when you didn't know about it and were not thinking about it?

    I call conspiracy!

    And while you're at it, stop fixing my extra 10 pounds in existence: how insensitive!

  52. Sure its' not... by Nazmun · · Score: 0

    Just try to electrocute your hear with it... tell us if you die or not... oh wait...

    --
    Hmmm... Pie...
  53. Breakthrough is near! by slobber · · Score: 4, Funny

    Have you seen those awesome hovercrafts in Matrix? Recall all the lightning around them? These must be it: "Nebukadnezar - powered by ionic wind!"

    --
    "You mortals are so obtuse." -Q
    1. Re:Breakthrough is near! by Anonymous Coward · · Score: 0

      Nebuchadnezzar.

    2. Re:Breakthrough is near! by FrostedWheat · · Score: 1

      Nebukadnezar - powered by ionic wind!

      I read that as 'Ironic Wind' ... hmmmmmm *eg*.

    3. Re:Breakthrough is near! by Anonymous Coward · · Score: 0

      No, I think that was "Nebucadnezar - powered by the wholesome nutritious goo that tastes like chicken, causing bad winds"

    4. Re:Breakthrough is near! by Anonymous Coward · · Score: 0

      For god's sakes, you dolt, nebuchadnezzar. You remember, right? The king of Babylon?

      Gah!

  54. Why shouldnt i care? by dnoyeb · · Score: 1

    Seems to me no matter what you call it, its still floating. Why shouldn't I be interested in this technology? Is it somehow impracticle? Why cant planes use it?

    I'd love to change my Truck from 2500Lbs to ~1000Lbs. That would save me a TON of gas ;)

    1. Re:Why shouldnt i care? by Sgs-Cruz · · Score: 2, Interesting

      Okay, let's work this out. He uses a 50kV at 4 milli-amp power supply. That's 200 W power supply. With that he creates approximately a pound of upward thrust.

      You want to create 1500 lbs upward thrust. You'll need 300 kilowatts of power. Let's say you want to run it for one hour. You've used 300 kilowatt-hours (1.08 gigajoules) of energy.

      According to here, you've actually used 8.19 gallons of automotive gasoline to power your device.

      On the other hand, if your truck now weighs only 1000 lbs... you might be on to something!!

      --

      Karma: pi (Mostly due to circular reasoning in posts).

    2. Re:Why shouldnt i care? by AvitarX · · Score: 1

      WHat makes your big truck hve crappy gas milage is it's shape and it's motion innerti (mass).

      It will not drop the mass of your truck.

      All the weight does is add some rolling friction.

      --
      Wow, sent an e-mail as suggested when clicking on "use classic" banner, and got a fast response that addressed my msg
    3. Re:Why shouldnt i care? by GnarlyNome · · Score: 1

      Also it would make a hellva anti theft device.

      --
      Diplomacy is the art of saying "Nice doggie" until you can find a rock. Will Rogers
    4. Re:Why shouldnt i care? by dnoyeb · · Score: 1

      All the weight does is add some rolling friction.
      Uhh, yea. inertia only slows my start, once I am moving were done with inertia, or rather its working for me now. Air resistance is not that great but it is significant. Most loss is in the friction. Or didnt you notice smaller lighter vehicles almost always get better gas mileage regardless of their shape.

    5. Re:Why shouldnt i care? by AvitarX · · Score: 1

      Your right, I was stupid.

      I'm sure that in the city mass has a lot to do with it, but on the highweigh it has to be weight now tha ti think about it. Otherwise SUVs would get respectable gas milage there and they still don't.

      --
      Wow, sent an e-mail as suggested when clicking on "use classic" banner, and got a fast response that addressed my msg
  55. Re:Vacuum operation by Anonymous Coward · · Score: 0

    Ouch, that was harsh, funny as hell but harsh. Mod this man/woman/it up!

  56. Not Antigravity by nurb432 · · Score: 1, Redundant

    If you take some time to read, its not antigravity, its got a more rational theories of how they work, dealing mainly with ion flow.

    Its also an old story.. been posted several times in the past.

    --
    ---- Booth was a patriot ----
  57. Poor Guy ... by Anonymous Coward · · Score: 0
    After that, interest in Brown's work slowly waned. The Pentagon never pursued the technology, and investors weren't interested. Worse, Brown's scientific credibility crumbled when, obsessed with UFOs and their means of propulsion, he founded the National Investigations Committee on Aerial Phenomena to hunt for little green men

    Translation: You were really good .. now you really suck, you are the weakest link, goodbye!

  58. They need something to 'push' against by nurb432 · · Score: 2, Insightful

    Just beacuse they dont work in a vaccum doesnt mean it should be dismissed...

    How many 'flying things' work in air.. pretty much everything..

    The concept has promise for earthbound flight.

    The voltage can be safely contained as well.. Not all devices using the techniques are 'open' like a lifter, some are sealed.

    --
    ---- Booth was a patriot ----
    1. Re:They need something to 'push' against by Smidge204 · · Score: 2, Informative

      But if it requires an atmosphere, then it's not "antigravity"... and that's what it's claimed to be. People like to toss around the term "antigravity" because it seems to discredit established research.

      Kinda like "alternative medicine" - First they say your regular doctor doesn't know as much as they do and conventional medicine is a failure. Then they claim their products are 'clinically tested' and 'scientifically proven' to work.

      Besides, there are other problems with this device. The lift power they generate is relatively low for their size. They also use the same principle of operation as the ionic breeze(tm) air cleaner thingy (not an endorsement, just an example). Here's a link to the US patent for anyone that wants a better look at how it works. (Gee, does that mean this "invention" is already patented? If it was "invented" in the 1920's, is that prior art?)

      I wonder if these "lifters" are prone to "fouling", since they do work on the same principle as those air filters :)
      =Smidge=

    2. Re:They need something to 'push' against by jstott · · Score: 1
      Kinda like "alternative medicine" - First they say your regular doctor doesn't know as much as they do and conventional medicine is a failure. Then they claim their products are 'clinically tested' and 'scientifically proven' to work.

      Actually, the will say anything except that the products are "clinically tested" and "scientifically proven". Say either of those two phrases, and you fall under the jurisdiction of the FDA. Avoid making those two specific claims, and you can market without any regulation. Suggestions, hints, obfuscation, etc are all fine, as long as you don't make any explicit scientific claims.

      -JS

      --
      Vanity of vanities, all is vanity...
  59. the sig IS: by Anonymous Coward · · Score: 0

    Wendy, I haven't been able to get in touch with Vel to get your number. Give me a call, 2) 632-8782. Bryon

  60. Political Statement Here: by Anonymous Coward · · Score: 0

    Individual tries to impose his fascist views onto others. Please help the Foundation for Freedoom of Speech on Slashdot (FFSS). Think of what your founding fathers would do. They would not sit idly by.

    Thank you.

  61. Imagine a... by inode_buddha · · Score: 1

    Segway that *hovers* instead...

    --
    C|N>K
  62. Will it clean my air? by Jafafa+Hots · · Score: 1

    Can we make our own Ionic Breeze® machine out of one of these?

    --
    This space available.
  63. I built one a while back. by nomel · · Score: 4, Informative

    I made one of these things a while ago.

    website here

    My website has picture too! Even of my high tech power supply apparatus! And my super HV safety encolsure!

    Even got some video (which unfortunatly isn't on my website yet, can't find the tape) of it's final crash. You can definitely feel the ionic wind underneath the thing. It was a lot of fun making it though. Only burned a couple hole in the carpet (the cement under the carpet is plenty conductive), a floormat (I repeat, the cement is conductive), and some paper (got in the way of the cement), and lots of grass from when I used it outside (ground is conductive too, duh). At least my lifter went out in a flaming ball of glory, when it proceded to fly into a metallic doorframe, causing huge arcs and fire (which happens to be what I got on video:) after I cut one of the teathers (Muahhaha!).

    Some think it is forces cause by the electrical field lines going from plates that are perpendicular. This is interesting, but i don't think this is how it works. If you look at the design, there is no stable capacitor. Since you do not ground the foil, you are not making a plate that will stay at a substantial potential that is less than the wire, because of ionized air and sparks that tend to sometime fly to it. And, the capacitance would be sooo low, that 25kv most likely wouldn't be enough to lift it even if those forces did exist. Also, looking at the construction, I can't see and perpendicular plates.

    I also saw an experiment, cant find it though, of someone who put one in a bag that was wrapped around it. It didn't fly...which proves it. And, someone told me that if you monitor the current (didn't have or make a HV current meter at the time) there is a HUGD power draw that would be plenty to lift the lifter.

    1. Re:I built one a while back. by starburst · · Score: 1, Offtopic
      This message written using the Dvorak keyboard layout

      Is that supposed to explain the typos?

    2. Re:I built one a while back. by kingalba · · Score: 1

      I didn't actually make one but my friend did atempt to make one for a science fair project. He would have never even known about it if i hadn't shown him it. So he makes and its just a small triangle made of tooth pics, totatly out of shape, and on top of that he doesn't have the right power supply because of science teachers husband, who is an engineer, won't helps us modify a monitor to get the 30,000 Volts we need. It doesn't work but he still wins at our school cuz he filled it with a punch of crap and clip art. At regional's he is shoot down by the judge who says he researched it and said it doesn't even work. Then I read this article and I see that kid win's first place in state. Needless to say I emailed my friend the article to rub it in is face. The moral of the story....Keep cool science fair projects to ya self.

    3. Re:I built one a while back. by Anonymous Coward · · Score: 0
      The moral of the story...

      Really? I thought the moral was that you can get away with failing English since fifth grade.

    4. Re:I built one a while back. by Astrorunner · · Score: 1

      Me fail English? That's unpossible!

  64. I hate to /. this guy's site but... by mikeophile · · Score: 3, Interesting
    If you want to build a really neat motor using exactly the same principles as these "anti-gravity" machines, check out this link.

    http://www.amasci.com/emotor/emot1.html

    You can use a TV screen as your high voltage source.

    I had a variation of this spinning on my office PC a few years back.

    Nothing says geek quite like a monitor powered ion motor on your desk.

  65. Don't listen to the troll, kids! by wass · · Score: 5, Insightful
    The 120v from a US wall socket is not enough to kill you.

    No!
    Well, if you want to Darwin yourself, go ahead, but this is for the benefit of other /.ers that might actually believe you.

    120 VAC conducted through relatively dry skin and with no other bodily paths to ground for a short enough time might not be so bad. Even at 240 VAC too.

    Now if you've just come out of the shower, and your feet are touching a nice wet grounded contact, or say one of your hands is touching the bathtub spigot, while you touch the hot lead of 120 VAC, say bye-bye. Actually, you won't be able to say it, your muscles will just quiver at 60 Hz (really at 120 Hz [I think] because you'll get two quivers for each cycle) until your heart fibrillates.

    If that still sounds relatively tame, you can take two thumbtacks, press them deep into your thumbs, and connect them across the 120 VAC. You might get a nice scent of roasting meat for a few seconds too. To bad you'll be cooking and electrocuting yourself and unable to autocanabalise yourself instead.

    I do not know the current, but I do know it won't kill you,

    Ohm's Law. Well, sort of. The resistance of the human body is non-linear, and also non-homogeneous. As you lower the resistance through any means, you'll have more current flow. If that current flows through your heart, it can be more likely to give your heart fibrillations. Translation - 120 VAC can kill you.

    --

    make world, not war

    1. Re:Don't listen to the troll, kids! by dJCL · · Score: 1

      I was at my parents house sitting a few weeks back when the second phone line died(no dsl, just dialup, and I only had a 14.4 on me). I was the one who wired the house's phone systems and so I wen't to take a look. Well I zapped my fingers a few times catching the live phone lines, but nothing serious, didn't bother me. The next day my finger tips felt like I had burned them on something mildly too hot. I had a mild burn in each finger I zapped. I wouldn't kill you, but it does annoy.

      --
      On Arrakis: early worm gets the bird. Magister mundi sum!
    2. Re:Don't listen to the troll, kids! by Anonymous Coward · · Score: 0

      So you felt the on-hook current. BFD.

      Now try that same trick on a line that's ringing. I guarantee you will feel the difference.

      Related note based on my own experience: when working in a tight space, that funny feeling in your ear that's up against a metal support is because you're using a conductive tool on the live 66 block! I was leaning against a pole in a basement using my Leatherman to push on some wires and wondered what was making my ear itch. Good thing it didn't ring...

    3. Re:Don't listen to the troll, kids! by dcmeserve · · Score: 1
      If that current flows through your heart, it can be more likely to give your heart fibrillations.

      Reminds me of the tale told by my high-school physics teacher, of a man jogging (or some such) in a lighning storm. A tree branch or something knocks a live powerline loose, which happens to hit him, sending his heart into fibrillations. As he was lying on the ground, almost assuredly going to die, lightning happened to strike an object nearby, whacking him with a nice, constant voltage. This "rebooted" his heart, essentially, just like a defibrillator at a hospital. It started beating normally again, and the guy was ok.

      True story (according to my physics teacher).

      --
      "Orthodoxy is unconsciousness" - Orwell
    4. Re:Don't listen to the troll, kids! by cmich · · Score: 1

      A couple things :

      First, when I was traveling in Peru they had "electric showers". Instead of a conventional water heater and tank the water was heated at "the last mile", right in the shower head (yes I stayed at cheap hotels!). Of course they never quite worked right so you had to stick your fingers around and try to get them going. Anyways, I was playing around with the damm thing when the pipe ripped out of the wall (there was weak joint at the wall). I instinctively grabbed the pipe and got a wopping shock. I had wet feet, wet hands and was butt naked. The shower head had nice fat 240V lines comming in. Anyways, as you can tell, I survived. I certainly got a good shaking though! I imagine that I'm not the first person who gets electrocuted by these things. So, to conclude, I think a 240V line is not (always) deadly, even when wet.

      The thing to understand is that the power coming into your house or coming out of a battery is not a perfect voltage source. It will not give you the same voltage regardless of current. It is also not a perfect current source (it doesn't provide a constant current regardless of resistance). It's somewhere in between. It can be modeled as a perfect voltage source in series with a resistor. If you start drawing lots of current the effective voltage drops. Therefore current does not vary linearly with the inverse of resistance of the "useful load" (you).

    5. Re:Don't listen to the troll, kids! by Realistic_Dragon · · Score: 1

      One of the Darwin awards if for a guy who managed to kill himself with a 9V PPC battery, by sticking the electrods into his thumb. Whoops.

      --
      Beep beep.
    6. Re:Don't listen to the troll, kids! by ajs318 · · Score: 1

      Electric showers are the norm in this country, too. They run at 230V and around 30-50 amps depending on the kilowattage. Fortunately, we're fastidious about earthing {I don't think any other country has exclusively 3-pin plugs all with integral fuses, but am prepared to be corrected}.

      And the soles of your feet are not the earth return path when you touch a live wire! The earth return is the whole surface of your body acting as one plate of a large {large as in cubic metres, not in farads} capacitor, the earth is the other; shoes, clothes &c. are the dielectric. If you touch an earth or neutral wire at the same time, the current has an easy return path so you will more likely get a localised shock and burn.

      Electric shock is a heavily-misunderstood phenomenon, probably because people prefer to avoid it altogether rather than learn from experience, thus limiting experimental data.

      --
      Je fume. Tu fumes. Nous fûmes!
    7. Re:Don't listen to the troll, kids! by Anonymous Coward · · Score: 0

      You generally see non-conductive fittings used with electric showers, too.

    8. Re:Don't listen to the troll, kids! by jeff_bond · · Score: 1
      One of the Darwin awards if for a guy who managed to kill himself with a 9V PPC battery, by sticking the electrods into his thumb. Whoops.

      I used to test 9v PP3 (not PPC) batteries for freshness by putting my tongue accross the contacts. New ones would certainly make you wince!

      Jeff

      --
      stty erase ^H
    9. Re:Don't listen to the troll, kids! by Carewolf · · Score: 1

      It takes 210Volts to conduct electricity through human flesh (from hand to opposite hand, depends on length of path). Contrary to common belief being wet protects you. E.g. it is pratically impossible to get killed by droping a power appliance into the same bathtub as yourself, since the current will rather travel through the water. Being wet while touching a 120V lead will conduct the current, but mostly along you skin giving you a nice burn.

      Ofcourse there are pleanty of stories where special conditions changes the result, but these are not evidence of the contrary merely strange coincidences.

    10. Re:Don't listen to the troll, kids! by ShavenYak · · Score: 1

      Poles in basements suck. Especially when it's an old basement and all the electrical circuits are two-prong. I can't count the number of times I've been playing an electric guitar through an amp that's not grounded, touched a basement pole, and gotten zapped. Same thing can happen to the singer if his lips touch the microphone. Singing guitar players can even get zapped without touching anything but the guitar and the mic, if the PA amp and the guitar amp have a different idea of what 'ground' means.

      --

      Hey kids, there's only 5 days left 'til Yak Shaving Day!
    11. Re:Don't listen to the troll, kids! by naasking · · Score: 1

      It takes 210Volts to conduct electricity through human flesh (from hand to opposite hand, depends on length of path).

      Much less if you puncture the skin I imagine.

    12. Re:Don't listen to the troll, kids! by TexVex · · Score: 1
      ! I imagine that I'm not the first person who gets electrocuted by these things.
      You weren't electrocuted by one of those things. "Electrocute" is a combination of the words "electricity" and "execute"; someone who has been electrocuted has been killed by electricity. Unless you are somehow slashdotting from the Other Side, you merely experienced electrical shock.
      --
      Fun with Anagarams! LADS HOST, SHALT DOS. HAS DOLTS. AD SLOTHS, HATS SOLD. ASS HO, LTD.
    13. Re:Don't listen to the troll, kids! by Optic7 · · Score: 1

      Yep. Electric showers in Brazil too when I used to live there. Nice DIY installations too, with electric tape and all. People get shocked all the time with them, it's almost routine.

  66. Oh yes it is by Beryllium+Sphere(tm) · · Score: 2, Interesting

    http://www.cpsc.gov/library/foia/foia03/os/GFCIs.p df

    Two hundred a year dead in residential electrocutions, four a year just from do-it-yourself microwave oven repairs.

    Many people have survived 120V shocks, but then many people have survived unprotected sex in Haiti.

    1. Re:Oh yes it is by Jeffrey+Baker · · Score: 1

      The people repairing ovens and television sets aren't being killed by 120V mains power. They are being killed by massive stored charges from capacitors discharging into them. "Total protoonic reversal," as a man once said.

    2. Re:Oh yes it is by Metasquares · · Score: 1

      I remember hearing that microwaves can store charges in the thousands of volts, at relatively high current (I forget exactly how much). CRT devices (Monitors, TVs, etc.) can also store kV charges, but only at a few mA... it's probably still more than enough to kill a person, though. As the other reply said, it's not line current that's killing these people.

    3. Re:Oh yes it is by Carewolf · · Score: 1

      Microwave oven and televisions set doesnt kill through 120V. In fact what makes them dangerous is that they kill even then turned off and deconnected. They kill because of really powerfull capicitors, that store the electricity and releases it in deadly shots like in an electrical chair.

  67. The man behind the science by txguy1 · · Score: 2, Interesting

    This Thomas Townsend Brown site has everything from his family history to research documents and patents.

  68. Any different? by inertia187 · · Score: 2, Interesting

    Is this any different from what these guys did? Actually, this link seemed fake to me when I first saw it on slashdot. They claim to use DIAMAGNETIC LEVITATION, not anti-gravity. I'm still waiting for the home model.

    --
    A programmer is a machine for converting coffee into code.
  69. A question, then ... by Mikey-San · · Score: 1

    How much voltage is it gonna take to raise SCO's stock after the dive it's gonna take when IBM stomps them into the dirt? :-D

    Ouch. I can /hear/ my karma burning . . .

    --
    Mikey-San
    Karma: +Eleventy billion (mostly affected by watching Celebrity Jeopardy)
    1. Re:A question, then ... by Anonymous Coward · · Score: 0

      hahahahahahahahaha lololololololololololol!!!!!11

  70. frogs as ammunition? by Anonymous Coward · · Score: 0
    I noted your link referred to a clever way of levitating live frogs.

    Just for fun, I will suggest another way.

    Set your frog on the counter.

    Roll steel BB's to it in such a way to fool the frog into thinking they are flies.

    After tricking your frog into swallowing a bunch of steel BB's, load your frog into a rail gun made with length of PVC pipe.

    Launch the frog through your neighbor's window next time they are having noisy sex.

    It may take several tries before you get their full attention but it will result in some interesting talk going around the neighborhood.

    1. Re:frogs as ammunition? by Anonymous Coward · · Score: 0

      I know you're kidding around but a coilgun might be more suitable.

  71. Goodbye Muldar, Farewell Scully by fm6 · · Score: 1
    You can definitely feel the ionic wind underneath the thing.
    Jeez, you mean we've been listening to these stupid UFO stories for 50 years now, and it's all because all these crackpots didn't notice a slight breeze????

    I've often wondered where the UFO mythology came from. Academics talk about cold war paranoia and the semiotics of the space age. Being of a more prosaic turn of mind, I've always assumed that stories about the AvroCar grew in the telling. But now it just turns out that a bunch of nitwits can't distinguish ozone from antigravity. Yep, the truth's out there all right, but I'm too tired to look for it!

    1. Re:Goodbye Muldar, Farewell Scully by rot26 · · Score: 2, Interesting

      Jeez, you mean we've been listening to these stupid UFO stories for 50 years now, and it's all because all these crackpots didn't notice a slight breeze????

      I'm going to GUESS that anybody who noticed it would assume that the "gravity field" was responsible for moving the air. It wasn't mentioned in this article, although it's mentioned plenty of other places, that the folks who buy into this stuff believe that anything that's inside the field (i.e. between the + and - plates) is subject to the "gravitic force"... and that would include air, which would be moved around as a result.

      And NOT that I believe in this stuff, but it would have been interesting for the author to have pursued the B-2 angle. They may not be using this stuff for gravitic propulsion, but they're using it FOR SOMETHING, i.e. the B-2 has a + charge on the leading edge of the wing and a - charge on the trailing edge (or vice versa and who cares anyway). It's classified, so it must be interesting, no?

      --



      To ensure perfect aim, shoot first and call whatever you hit the target
    2. Re:Goodbye Muldar, Farewell Scully by Anonymous Coward · · Score: 0

      I'm going to GUESS that anybody who noticed it would assume that the "gravity field" was responsible for moving the air. It wasn't mentioned in this article, although it's mentioned plenty of other places, that the folks who buy into this stuff believe that anything that's inside the field (i.e. between the + and - plates) is subject to the "gravitic force"... and that would include air, which would be moved around as a result.

      But if there was some sort of "gravity field" between the plates, pulling the lifter upwards, surely it would pull the air in the field upwards as well? Unless it's some kind of "intelligent gravity" that has a different effect on balsa wood than on air? A simple wet-finger-in-the-breeze test should make it extremely obvious that there is nothing more going on than F=ma, albeit in an interesting and novel form.

      Lifters are an interesting little science project, but there's a fair bit of willful self-delusion going on in the heads of the anti-gravity true believers.

    3. Re:Goodbye Muldar, Farewell Scully by zCyl · · Score: 1

      i.e. the B-2 has a + charge on the leading edge of the wing and a - charge on the trailing edge (or vice versa and who cares anyway). It's classified, so it must be interesting, no?

      No. Picture the B-2 as a cat, and the atmosphere as a sweater. Then move the cat at a few hundred miles per hour along the sweater. I guarantee you that you'll displace a few charges toward the tail of the cat.

  72. HV Safety Tips by nomel · · Score: 1

    Always use you right arm since te path to ground has a better chance of being away from your heart. NEVER use both at the same time. Keep your left in your pocket. Unless you are right hearted of course?

    Never use black plastic for an insulator or gloves unless they are specifically designed for HV. There are high amounts of carbon in black plastic, so it will conduct. Believe me ;) This is also why you never see black plastic being used on things in Anechoic chambers, the EM waves will reflect off of it.

    Make sure the TV, power supply, or whatever, is turned off when handling the wire. *BUT* don't even consider trusting that. Unplug it after every use. Better to be safe than dead.

    I know it's fun to zap things with the TV power supply, but they aren't made to handle the high currents that useually are related. It WILL burn out eventually if you let it sit there for too long (like more than a second or so). You will most likely first see smoke comming from the electronics in the back of the TV. It can last quite a long time after this if you don't do it too much more, and if the TV I designed badly (considering what would happen if it were you between the wire).

    NEVER EVER do it alone. Make sure there is someone that is capable of unplugging the TV and performing CPR (seriously). If they can't do that, digging a large hole is the only skill required.

    Always be afraid.

    Don't do it at all.

    If you should break any of these rules, natural selection will strike down one more dummy.

  73. Re: breaking ionic winds by slickwillie · · Score: 1

    Ionic wind farts smell worse than when my wife's dog eats a mostly rotten skunk.

  74. That's too bad. by jromz03 · · Score: 0

    I guess the search anti-grav continues. They better hurry it's almost 2015, I want my hovercraft by then.

  75. I Guess I'm Easily Impressed by JMPrice · · Score: 1

    "contraptions harnessing ionic winds" still sounds pretty damn cool to me.

  76. Re: breaking ionic winds by djupedal · · Score: 1

    I broke ionic wind once...spent a week in the hospital. Damn Doctor wanted to write a paper...no thanks.

  77. new uses by Tablizer · · Score: 1

    A couple of wires wrapped around the little guy and a jillion volts, who needs viagra anymore?

  78. Any bets... by Lord_Dweomer · · Score: 1
    on how long it takes Thinkgeek to sell an overpriced version of one of these for your desk? And then how long before Slashdot posts a dupe just to plug said Thinkgeek product?

    --
    Buy Steampunk Clothing Online!
  79. The Lightning Diet! by Anonymous Coward · · Score: 0

    Try it, the new, guaranteed Lightning Diet! Just plug our nifty little device into the nearest electrical socket, let it charge, then flip the switch. We guarantee you'll be pounds lighter in an instant.

    DISCLAIMER: Some users may experience mild electrical shock, tickling, burns, static discharge, fried body tissue, charred flesh, cremation, or even death. Lightning Diet is not responsible for any side effects you may experience.

  80. Power effeciency? by MikeFM · · Score: 2, Interesting

    Given the dangerous levels of electricity the use seems limited. Also I wonder how well these could be kept over the generators? Wouldn't they fly right off their power source? How effecient is it to 'beam' power to fly a load compared to just putting the power source in the flyer itself and flying in a traditional way? Sounds cool but seems it'll need a lot of work to be useful.

    --
    At what price learning? At what cost wisdom? The price is a man's peace of mind, and the cost is his life.
    1. Re:Power effeciency? by spike+hay · · Score: 1

      Given the dangerous levels of electricity the use seems limited. Also I wonder how well these could be kept over the generators? Wouldn't they fly right off their power source? How effecient is it to 'beam' power to fly a load compared to just putting the power source in the flyer itself and flying in a traditional way?

      They aren't "kept over the generators." It's just a simple, regular old wire connected to the power source. Beaming power with microwaves could work for larger craft, but it would be innefficient. Putting the power source on the flyer itself would make it too heavy. These things have lift measured in grams. It takes shitloads of power to lift some foil and a few pieces of balsa wood.

      These ion lifters are really fun (albeit dangerous) science experiments. But they are no more antigravity than the Sharper Image "Ionic Breeze." They certainly won't be replacing helicopters or planes.

      --
      If you don't understand any of my sayings, come to me in private and I shall take you in my German mouth.
    2. Re:Power effeciency? by Moofie · · Score: 1

      Am I the only person who's a little worried about beaming lots of power to devices?

      I read a story about a fellow who liked to eat his lunch in front of a microwave horn on an aerial somewhere, and woke up dead.

      I know that military fire-control radars (many in the microwave band) can kill small animals easily.

      Can somebody provide me with some data on safe power-density figures for microwave radiation? (Assuming a relatively unidirectional beam, evenly distributed on a torso-sized target, just for grins)

      --
      Why yes, I AM a rocket scientist!
    3. Re:Power effeciency? by CProgrammer98 · · Score: 1

      "woke up dead" ummm how can you wake up if you're dead ????

      --
      And the people shall be oppressed, every one by another, and every one by his neighbour Isaiah 3:5
    4. Re:Power effeciency? by hesiod · · Score: 1

      > I read a story about a fellow who liked to eat his lunch in front of a microwave horn on an aerial somewhere

      That is a hoax, although a very widely believed one.

    5. Re:Power effeciency? by Moofie · · Score: 1

      Snopes rules. Thanks for the dope slap. : )

      --
      Why yes, I AM a rocket scientist!
    6. Re:Power effeciency? by spike+hay · · Score: 1


      Am I the only person who's a little worried about beaming lots of power to devices?


      Yeah, the power needed to power a large ionocraft would be gigantic. You would not want to point it the wrong way, obviously. RF radiation is very dangerous because it cooks an object that contains water (like people or leftover stirfry) evenly througout. Thus, if you got hit by a few thousand watts of microwaves, your internal organs would be cooked if you stayed in the path of the beam long enough.

      --
      If you don't understand any of my sayings, come to me in private and I shall take you in my German mouth.
    7. Re:Power effeciency? by Moofie · · Score: 1

      It's called an idiom, dumbass.

      You know, when a mobster says that somebody's "sleeping with the fishes", they're not really sleeping.

      --
      Why yes, I AM a rocket scientist!
  81. It must be vacation time... by Monkey_Genius · · Score: 2, Interesting

    This was covered in an article a year and a half ago...

    http://science.slashdot.org/article.pl?sid=02/03/2 2/2359231&mode=thread&tid=159

    Here's the best "practical" use of this "technology"...

    http://www.sharperimage.com/us/en/catalog/productv iew.jhtml?pid=175300

    --
    I've got your sig, right here.
  82. you are wrong: Re:amps kill, volts are fun by Anonymous Coward · · Score: 0

    you're wrong. the parent post was correct. amps kill you, not volts. what's important is not only the terminal voltage of whatever you're hooking up to yourself and the resistance of what you hook it up to, but also the internal resistance. for example, if you hooked a battery up to a light bulb, the current would depend on the voltage of the battery, the resistance of he light bulb, AND the internal resistance *through* the battery.

    transformers can convert a normal voltage into a very high one, but at the cost of a lower amperage(because of energy conservation (new amps times new volts can't be more than old amps times old volts)). so, even at 10,000,000 you can be safe, since there is a very high internal resistance between the two terminals. you could hook 10,000,000 volts up directly to your heart and be fine, as long as the current is low. conversely, you could hook up 120 volts going in one arm and out the other and die, if many amps are allowed to go through (as in a wall outlet).

    it's current, not voltage. don't talk about stuff you don't know.

    1. Re:you are wrong: Re:amps kill, volts are fun by Anonymous Coward · · Score: 0

      Y9ou guys are all nuts. Its all about Ohms freaking law. E=I/R. Its like the holy trinity. You didnt find 10$ on the floor just because of Jesus, but also God and the Holy Spirit at the same time.
      " In wire terms, Electrons crawl through at a rate determined by the charge pulling force in Volts, and the conductance (DC)/velocity factor(AC) of the wire. Thats where the traditional F=ma is, Force in volts, mass in Amps, and the inverse of accelleration, resistance in ohms(conductance^-1)."
      And the current drain is from transmission from the battery, not inside the batter.
      Also what kills your heart is the energy transformed from electricity to the body- so frequency and alternating the current backwards and forwards (which comes from modulating the voltage) do it too. Bullets (current) dont kill, but people with guns (high force potentials) do.
      Please refrain from discussing shit you havent learned yet.

    2. Re:you are wrong: Re:amps kill, volts are fun by dnoyeb · · Score: 1

      you could hook 10,000,000 volts up directly to your heart and be fine, as long as the current is low. conversely, you could hook up 120 volts going in one arm and out the other and die, if many amps are allowed to go through (as in a wall outlet).

      Are you a 2nd year engineering studend? Sounds about right. If you hook 10,000,000 volts to 1 ohm and it does not produce 10,000,000 amps, then you are in an alternate universe.

  83. construction guide by iosmart · · Score: 1

    if anyone's still looking through this discussion - i've been able to find and mirror the construction guide.

  84. Ob That 70's Show by sharkey · · Score: 1

    I saw a UFO once, man. It just floated there in the air. Then it said I was going to have a good year.

    --

    --
    "Outlook not so good." That magic 8-ball knows everything! I'll ask about Exchange Server next.
  85. damn thing upstaged me by NOLAChief · · Score: 1
    Couple of weeks ago, one of the engineers where I work brought one of these into a staff meeting just after I had finished a (damn good, IMHO) presentation. Started everyone drooling. Looked nice, (even turned out the lights to see the copper wire glowing at the joints) but it's all show.

    "(It has) no moving parts, no onboard power supply..." That's the key. This thing isn't wireless, and the power supply this guy used was huge. Now how useful would a car be without an onboard power supply?

  86. several small problems by Alien54 · · Score: 4, Insightful
    If you look at it carefully, you will notice that
    • these things are basically aluminum foil and balsa wood. and some wires with some pretty high voltage.
    • they are tethered down with fishing line so that the don't go shattering themselves, crashinfg high voltage lines into the operators. Otherwise there would be no control whatsoever.
    • The fishing line is usually not visible
    • the actual power supplies are kept out of sight, and are good old fashioned heavy as S*** high voltage generators with a plug to the wall. think a ten or twenty pound unit punching HV into a 2 or 3 oz "lifter"
    Until they can overcome this need to have an external power unit that outweighs the "lifter" by a factor of at least a couple of hundred to one, this will not be a practical technology. Never mind the need for invisible tether strings for navigational control.

    Lets face it, you throw enough voltage into something, and you can make almost anything flip.

    --
    "It is a greater offense to steal men's labor, than their clothes"
    1. Re:several small problems by shpoffo · · Score: 1

      Until they can overcome this need to have an external power unit that outweighs the "lifter" by a factor of at least a couple of hundred to one, this will not be a practical technology. Never mind the need for invisible tether strings for navigational control.

      unless, you can scale a lifter to carry sensors to mars, and bead energy to it via orbital collectors..... and that's what we're getting toward here.

      Reading the articles further will elaborate ont his topic in much more detail

      -shpoffo

    2. Re:several small problems by fenix+down · · Score: 5, Interesting

      The lack of control thing is really just because nobody bothers to try. It's like building a helicopter rotor and engine and just turning it on. It'll flip all the fuck over unless you tie it down or something. I'm guessing if you put little stablizer lifters on the sides of your big lifter you get lighting going in between them or other bad things, but if you did something like that, I can't see this being any more unstable than any other kind of propulsion.

      BTW, if the Nebechunezzar runs on lifters, why does it need an EMP? Anything more conductive than a petrified Carrie-Anne Moss ought to be attracting ridiculous arcs by the time it gets within tense music distance, no?

    3. Re:several small problems by CProgrammer98 · · Score: 1

      If you take the time to read the article, you discover that these things don't work in a vacuum.

      --
      And the people shall be oppressed, every one by another, and every one by his neighbour Isaiah 3:5
    4. Re:several small problems by Chris+Burke · · Score: 1

      Forget the getting to mars part (the article didn't say it'd be used to -get- to mars)... It would be used on Mars, with an orbital power station beaming it power. That would actually be useful, because the extremely heavy/difficult part (the power collection/generation) could stay in orbit.

      --

      The enemies of Democracy are
    5. Re:several small problems by The_K4 · · Score: 1

      And "beaming power" is so easy and efficient!

    6. Re:several small problems by armb · · Score: 1

      > Lets face it, you throw enough voltage into something, and you can make almost anything flip.

      Anything except a dead parrot - 'Mate, this bird wouldn't "voom" if you put four million volts through it!'

      --
      rant
    7. Re:several small problems by Chris+Burke · · Score: 1

      Just because the technology isn't common today doesn't mean it isn't feasible. There are many unusual technologies involved in a mission to Mars that aren't attracting your derision.

      Haven't you heard of microwave power satellites? The biggest problem with them is the environmental and safety issues. Or using lasers, as is proposed for the Orbital Elevator that has appeared on /. before.

      Tesla demonstrated "beaming power" at the beginning of the last century. If things had turned out slightly differently for him, we might all be receiving our electricity wirelessly, and you wouldn't be making snide remarks about it. :)

      --

      The enemies of Democracy are
    8. Re:several small problems by Zirnike · · Score: 1
      "Until they can overcome this need to have an external power unit"

      Honestly? This sounds like a job for PowerLabs.

      --
      I'm not shy, I'm stalking my prey
    9. Re:several small problems by Physics+Nobody · · Score: 2, Interesting

      "Tesla demonstrated "beaming power" at the beginning of the last century. If things had turned out slightly differently for him, we might all be receiving our electricity wirelessly, and you wouldn't be making snide remarks about it."

      Oh please. Spare me. The fact that we aren't "receiving our electricity wirelessly" has nothing at all to do with how things "turned out" for Tesla. It has to do with the fact that while it is theoretically possible (hell, I've even done this on a small scale for demonstation purposes), it's completely and utterly impractical. The traditional tesla coil is omnidirectional and therefore any energy you put into the thing is spread out uniformly about the tesla, and the vast majority of it doesn't actually reach the device you want to power. This is in stark contrast to a wire, which will take all of your energy from point A to point B (minus some lost to resistence of course, but that's a comparatively small effect). And I haven't even mentioned the side effects of the Tesla approach. The things tend to ionize the air and create a lot of ozone and there's no way that sort of approach could be healthy for people in the long run if it was actually implemented on a large scale.

      This of course has nothing to do with the discussion at hand, which would most likely involve beaming power using masers or lasers, which, being focused beams, have the advantage of not spreading out very much as they travel great distances. This sort of approach is at least feasible, but there are a lot of details that have yet to be worked out.

      Anyway, I will leave you with two parting thoughts:
      1. The Martian atmosphere is much thinner and of a very different composition than the Earth's. How do we know that this sort of technology would be nearly as effective there as it is on Earth?

      2. If you're just going to beam energy to your craft anyway, why not just use that energy to power a more conventional drive? What is the real advantage of this approach?

      Well, I've rambled enough.

      --

      Physics is good

    10. Re:several small problems by ShieldW0lf · · Score: 1

      You don't see EMP effects caused by those Ionic Breeze devices, do you? They appear to use the same principle as these lifters.

      --
      -1 Uncomfortable Truth
    11. Re:several small problems by crazyphilman · · Score: 1

      Well, hang on a second here. Let's assume, first of all, that there's no antigravity present (I think this was proven fairly handily by NASA). So we've got an ion engine, which has, say, a pound of thrust for a several pound generator. And, the prototypes described don't have any navigation built in.

      So what? Let's take it a step further. Once you know how to build a prototype, it's a short hop to building an assembly of prototypes. Here's what I mean:

      Take the four-foot-diameter, one pound lifter. If you built it to take a higher voltage, you could probably increase the output, say, to two pounds. Alter the frame it's built on, and you can probably get it down to a few inches thick, like s slab. Use a wire mesh instead of tinfoil and you have a slab that air can pass through. So, try stacking them, with some kind of insulating ring preventing the hot wire from shorting to the mesh above it (so it only sends ions downward, not upward). If each three-inch slab can produce, say, two pounds of thrust, slap fifty together to produce a hundred pounds. Then, build eight or ten assemblies, so you can levitate a thousand pounds. Then, design your hypothetical hovercraft so that it weighs no more than seven hundred pounds, with two passengers.

      Ah, but you say navigation hasn't been solved. Ok, build your assemblies so that you can point them using a control stick of some kind. There's your control, right there -- directional thrust.

      It's an interesting idea. I see it as looking like a big Zodiac raft, with ten barrels strapped around the outside and two seats inside. If I built one, I'd take it on the thruway just to see the look on the cop's face as I blow past him, coronas of lightning shooting all over the place from my thrust assemblies. Think about it; it would be funny enough to justify the cost of building it.

      And, who else noticed that the Matrix hovercrafts seem to use this exact system? Someone likes obscure web searches, no?

      --
      Farewell! It's been a fine buncha years!
    12. Re:several small problems by Chris+Burke · · Score: 1

      The things tend to ionize the air and create a lot of ozone and there's no way that sort of approach could be healthy for people in the long run if it was actually implemented on a large scale.

      The same could be said for burning fossil fuels, but we do that. Other criticisms duly noted and accepted. The point wasn't really that we should all be using Tesla Coils, but that "beaming power" isn't as ridiculous as was implied.

      This sort of approach is at least feasible, but there are a lot of details that have yet to be worked out.

      You say that, I hear "engineering work that needs to be done". Being an engineer, I don't consider that a problem. :)

      The Martian atmosphere is much thinner and of a very different composition than the Earth's. How do we know that this sort of technology would be nearly as effective there as it is on Earth?

      Good point.

      If you're just going to beam energy to your craft anyway, why not just use that energy to power a more conventional drive? What is the real advantage of this approach?

      Flight, VTOL capability, and no moving parts. That basically expresses the advantages over all other methods I'm familiar with. If that doesn't cover one, please mention it.

      Oh, and I just thought of another advantage: It would look like a Flying Saucer to any Martians that happen to be there. :)

      --

      The enemies of Democracy are
    13. Re:several small problems by SCHecklerX · · Score: 1

      So I guess you don't like bumper-cars at amusement parks either? Why does the p.s. have to be onboard? Electric trains, trollies, maglev, whatever. There are practical uses.

    14. Re:several small problems by Shadowmist · · Score: 1

      Chris Burke writes:

      Just because the technology isn't common today doesn't mean it isn't feasible. There are many unusual technologies involved in a mission to Mars that aren't attracting your derision.

      Logically speaking it's not a truism that was isn't feasible today will be feasible tomorrow, next week, or ever. Yes, I've heard of microwave power satelites, horribly inefficient way to beam energy considering that less than one percent of the energy produced would actually wind up in the receptors. There's also rather unknown environmental and climate effects of effectively "nuking the planet from orbit."

      It's one thing for a brilliant mind like Tesla to demonstrate beaming power, making it practical is another trick altogether. So it'd take more than a slight difference, not only in the politics of Con Edison, but the physics of the universe itself.

    15. Re:several small problems by Anonymous Coward · · Score: 0
      Sorry, but I have to comment on your misunderstanding of Tesla's wireless power distributiuon experiments.

      Yes, a standard tesla coil can transmit energy as you say, but that's entirely different from his proposed global wireless power transmission theories and devices. Tesla was all into resonance. With his large "magnifying transmitters" as he called them, he used the Earth itself as a low frequency electromagnetic oscillator and fed energy into the earth at the required frequency. It takes a long time to build up this field, but once you have this large standing wave setup, you can extract the energy from any point in the system (except the two nodes). Tesla calculated the efficiency at over 90%, if my memory serves. It was during the prototype experiments that Tesla created the largest man made lightning ever recorded... something like 135 ft strokes (from the 200 ft. mast of his driver).

      His large transmitter at Colorado Springs was never finished because of conflict spurred by WW2 and the fact that he was a foreigner. His project was shutdown and the tower was dismantled before ever getting powered up.

    16. Re:several small problems by demyen · · Score: 1

      That would be one tall hovercraft. Wouldn't it be almost 12 and a half feet tall? Oh Well I guess we'll never see the hovercraft found in Star Wars.

  87. Comment removed by account_deleted · · Score: 1

    Comment removed based on user account deletion

  88. testing guide by iosmart · · Score: 1

    i think you would need the testing guide too.

  89. Small Cold Fusion by Anonymous Coward · · Score: 0

    Tritium & Deuterium; small

    Electron; Actually, this is much smaller

  90. Oslo? by DaBj · · Score: 1

    "And if you come across something, don't tell me about it - go straight to Oslo and the Nobel Committee."

    Oslo? What does he want with the Nobel peace price?
    Go to Stockholm and claim the physics price instead...

    --
    "GNU's not Unix....it's Linux" / Kami "kokamomi" Petersen
  91. You say that with such authority by nzyank · · Score: 0, Redundant

    I haven't read the Wired article yet, but I would guess it's not just an ion machine. It works in a vacuum also if it's what I think it is. (I'll read the Wired article later). I think a guy name Townsend Brown was working on it before he died. Lots of people claimed WITH GREAT AUTHORITY that it was an ion machine. He had his detractors, too. remins me of a guy I worked with. He was the software lead with a EE background. He told me that leds would not provide a voltage when light was applied. I proved him wrong. He also tried to tell me (I'm just a dumb software engineer) that if you bent an optical fiber the light would be constant at the receiving end. I proved to him that light escapes the more you bend the fiber. The thing is with pedantic people that they KNOW the truth until it bites them in the ass. Betcha you learned a lot in college and believed every word of it.

    1. Re:You say that with such authority by Tassach · · Score: 1

      If you had read the article instead of spouting off, you'd have found that it *IS* just an ion machine and that they authoritativly demonstrated that it does *not* work in a vacuum.

      --
      Why is it that the proponents of "one nation under God" are so eager to get rid of "liberty and justice for all"?
    2. Re:You say that with such authority by Anonymous Coward · · Score: 0

      rtfa

    3. Re:You say that with such authority by I+Like+Swords!!! · · Score: 1

      ... wait for it...



      You say that with such authority.

      ;-)

      --
      .unsigged
    4. Re:You say that with such authority by Maury+Markowitz · · Score: 1

      Townsend Brown worked on it in the late 20's to 40's and IIRC, but lived into the 1970's.

      As far as I can tell even he realized it was ion wind at the end, because he wrote all about other such devices. He worked for years in the field, and the last device I can think of was an electric ash tray thay sucked in the smoke with a little fan and then collected it with an ionizer.

      It was only after his death, more specifically the publication of Charles Berlitz's books, that he suddenly became the touchstone to the anti-gravity folks.

  92. illegal in several states by frovingslosh · · Score: 1
    my DC transformer, which I bought online from a guy who specializes in energy systems that are illegal in several states.

    Yea, illegal in several states. Damn those consumer protection laws!

    --
    I'm an American. I love this country and the freedoms that we used to have.
    1. Re:illegal in several states by Anonymous Coward · · Score: 0

      Than and an appropriate cap could net you a free energy machine. ;-) At least as far as the power companies are concerned. Not everything is a conspiracy sometimes they are just trying to keep you from cheating the system.

  93. didn't we see this in the Matrix movie???! by Anonymous Coward · · Score: 0

    Aren't the hovercraft vehicles in the Matrix powered by this ionic drive theory? With the sparking discs all around them?

    1. Re:didn't we see this in the Matrix movie???! by Anonymous Coward · · Score: 0

      They use Plot Devices. These are only slightly related to Treknology Plot Devices, which involve a magic three word phrase.

  94. Multiple uses by arth1 · · Score: 1

    I can see several possible markets for this type of lifting, even though it may not be the most cost-effective. Some points:

    1: It doesn't pollute (where the lifting occurs).

    2: It is quiet. Dead quiet.

    3: It has incredibly quick -- near instantaneous -- startup time, as there is no need to "rev up" a motor.

    4: It doesn't require an anchor / leverage point, except for holding the power cable.

    5: It can be designed to fit in specific spaces or shafts.

    6: It has no moving parts, and should require minimal maintenance (dusting?)

    I can definitely see a future with

    7: Marketing

    8: Profit!!

    Regards,
    --
    *Art

  95. Well by TheOnlyCoolTim · · Score: 1

    Shocking yourself with 120 V through one hand feels like a nice hand massage.

    Tim

    --
    Omnia vestra castrorum habetur nobis.
  96. is there any REAL work being done by the_2nd_coming · · Score: 1

    is there any REAL work being done on REAL anti-gravity, not this electro-magnetic force crap?

    --



    I am the Alpha and the Omega-3
  97. Re: It is already being used. by CrazyDuke · · Score: 2, Informative

    "so, in any case - ion wind or not, this technology is still not quite suitable for space just yet."

    It is already in use in satalites (with some success and some problems). Nasa is using it to make cheap satallites. How do they do it? They carry some gas (Xenon) with them to use to make the ion wind. No it isn't the same design, but it is the same concept (ionized propellant).

    --
    Any sufficiently advanced influence is indistinguishable from control.
  98. All we need is 100 /.ers by xphread · · Score: 0
    And we can track down this Bryon guy!

    We each ring one of the combination of numbers and pretend to be called wendy.

    Who's up for it?

    1. Re:All we need is 100 /.ers by Anonymous Coward · · Score: 0

      Since he just changed his sig, I'm thinking its one of these four: 202 212 252 262

  99. Fry Away Home by stanwirth · · Score: 1

    It's an equilateral triangle, 8 inches per side, composed of thin sticks of balsa wood. There's a ring of copper wire from RadioShack strung around the top and a strip of Reynolds Wrap held down with Krazy Glue around the bottom. When I throw the switch, 20,000 volts will course through this bundle of sticks and foil - and it will levitate.

    Didn't he mean DEFLAGRATE ?

  100. The Matrix! by cybercuzco · · Score: 1

    Hey, this tech looks like what the nebuchanezzar from the matrix uses for levitation/control. Any thoughts?

    --

  101. Sibling to Flying Cars by AndroidCat · · Score: 1
    In '50's, '60's Popular Science magazines, right along side the flying cars were the "electrofan" ionic propelled hover vehicles. This has been a pipe-dream for some time.

    It isn't anti-gravity, but if they can do something useful with it, a flying Segway would be cool. (Otherwise, STFU.)

    --
    One line blog. I hear that they're called Twitters now.
  102. Remember the Hutchinson Effect by shadownine · · Score: 1

    This sort of reminds me of the 1979 John Hutchinson experiment, Cant wait to get zapped when i put this baby together.

  103. Sooooo.... by I+Like+Swords!!! · · Score: 2, Funny

    Lets face it, you throw enough voltage into something, and you can make almost anything flip.

    What if we consume an entire day's worth of electricity for the city of New York in electricuting a death row inmate? Would it turn out to be an uplifting experience after all?

    --
    .unsigged
    1. Re:Sooooo.... by Demodian · · Score: 1

      Should we setup a lottery based on how far the body will fly? Proceeds go to paying the electric bill.

    2. Re:Sooooo.... by I+Like+Swords!!! · · Score: 1

      I thought that's what the admission prices were for?

      --
      .unsigged
  104. Smell the roses... by neurocutie · · Score: 1
    This stuff is old, old hat. I remember doing a high school science fair project with an ionic rocket. It was configured more like a rocket rather than a "floater" but same diff. Used an auto ignition coil to jack up to 20-40kv.

    The part that the article doesn't seem to mention but should have is that you make lots of ozone with these things and ozone isn't particularly good for you. I remember "the smell of ozone" in the morning -- it smells like sick-sweet roses.

    Anyways, cute, particularly that you can get a job at NASA doing this high school stuff... but far from revelatory...

  105. Depends by GnarlyNome · · Score: 1

    on who the inmate is

    --
    Diplomacy is the art of saying "Nice doggie" until you can find a rock. Will Rogers
  106. hmmm... not bad at all... by alizard · · Score: 1
    Only 8 gallons of gas for doing it the hard way? (i.e. no help from airfoil lift) and 1500 pounds of thrust?

    No wonder NASA is interested.

    1. Re:hmmm... not bad at all... by tmortn · · Score: 1

      thinks he goofed that a bit.... 300kw is about 400hp, and a 400hp engine will use a great deal more than 8 gallons of gas in an hour of operation... and a 300kw generator would likely need somewhere in the neighborhood of a 500hp engine to get the 300kw output due to inefficiencies of conversion. The energy contained in 8 gallons is about right actually, but engines are of course not perfect in converting that potential into energy.

      Thus to do this you take gas, convert to kenetic energy via the engine, then convert to electric energy via a generator then convert your electric output to HV energy which in turns generates ionic thrust by ionizing air and pushing it with the charge difference.

      Thats four energy conversions and there is loss at every step because nothing is 100% efficient. The big losses here are converting the gas to kenitic ( lot of thermal energy lost ) and in converting kenetic to electrical. Probably %80 conversion at both points would be close to tops.

      on the other hand if you use the engine to directly drive a propeller you loose the conversion to kenetic and the efficiency of the propeller at turning that kenetic energy into moved wind. My guess is it comes out pretty close with a deffinate edge to the propeller... how ever that is a very tricky drive system that has a very low tolerance for imperfection and high speed moving parts that can fail. THe real attractiveness of this technology is that if it can be as efficient or almost as efficient as propellers and varients ( jets ) are this would present far fewer moving parts and hoepfully be more reliable. COurse the voltage invovled and its habit for arcing with potential grounds at a distance could make for a an intersting safety issue.

      --
      I don't ask you to be me. I only ask you not expect me to be you.
    2. Re:hmmm... not bad at all... by Suidae · · Score: 1

      THe real attractiveness of this technology is that if it can be as efficient or almost as efficient as propellers and varients ( jets ) are this would present far fewer moving parts and hoepfully be more reliable

      And for an air vehicle, it doesn't have to carry around a motor and fuel. As per the article, NASA is interested in possibilities such as airborn Mars explorers that fly by receiving power from an orbital platform.

      I dunno how effective a lifter would be in Mars' thin atmosphere, but its an interesting idea. What also might be interesting is when photovoltaic cells reach very high efficency and can be produced in very thin, light coatings. Then instead of beaming power to a platform, it can generate its own electrical power.

  107. Dumb Poster by Directrix1 · · Score: 1

    The guy who posted this story does not remember his physics very well. This thing uses extremely high voltages not current. The current is actually quite small.

    --
    Occam's razor is the blind faith in the natural selection of least resistance and in universal oversimplification. -- EF
  108. Hutchinson effect - true/false? by rasafras · · Score: 2, Interesting

    http://www.americanantigravity.com/hutchison.html

    Lifters are well and good, but that reeks of large-scale BS.

    1. Re:Hutchinson effect - true/false? by gobbo · · Score: 1
      Lifters are well and good, but that reeks of large-scale BS.

      If you mean that lifters are a-grav, yeah, there seems to be some evidence that they're just really good ionizers, though I have trouble believing that the wind produced by ionization is strong enough to lift that much. But it hasn't really been studied in an adequately scientific manner, has it? At least not publicly. So you and I don't really know.

      If you're talking about the Hutchison [note spelling] Effect, well it's pretty widely documented, and Hutchison himself doesn't claim to understand it or explain it precisely. And elevation of objects is just one of the possible effects. Again, it hasn't been studied publicly in any adequate way, though given the large amount of shady and military interest (and interference) Hutchison has received, someone with deep pockets is studying it closely, privately. It would be premature to label what he's discovered as 'antigravity', since again we don't have enough data.

  109. no more than contraptions harnessing ionic winds by Anonymous Coward · · Score: 0
    Enthusiasts claim their vehicles are examples of a nascent antigravity technology, while more traditional scientists - including some funded by NASA - view them as nothing more than contraptions harnessing ionic winds.

    So f**king what. Floatey Floatey is pretty damn cool however you pull it off.

  110. my Electric Helicopter (RC) by GnarlyNome · · Score: 1

    weighs about 1/2 lb and flies for 4 minutes using a 35 watt motor and a 18 volt battery

    --
    Diplomacy is the art of saying "Nice doggie" until you can find a rock. Will Rogers
  111. Interesting lifter exp. looking at smoke/air flow by bigattichouse · · Score: 1

    Here
    Interesting, shows the airflow.. but they also do an insulator that shows lift WITHOUT airflow.

    --
    meh
  112. Those ships in the Matrix by Chaset · · Score: 1

    I thought it funny that when I read the description of the devices, these ships from the Matrix movies came to mind. (Recall those big, arcing plates on the ships). I wonder if that's in fact what the writers had in mind?

    --
    -- "This world is a comedy to those who think, a tragedy to those who feel."
    1. Re:Those ships in the Matrix by Shafe · · Score: 1

      I thought the same thing. I would like to ask the Brothers if that was their idea, but of course I doubt their e-mail address is on public display. The huge discs of electricity on the exterior of the Matrix hovercraft definitely appear to be some sort of electrogravitic propulsion.

  113. Lifter theory, efficiency equations by XNormal · · Score: 2, Interesting

    Evgenij Barsoukov has a page with a pretty convincing theory of lifters here. His equasions predict the thrust and efficiency of models built by many experimenters with fairly good accuracy.

    --
    Stop worrying about the risks of nuclear power and start worrying about the risks of not using nuclear power.
    1. Re:Lifter theory, efficiency equations by Maury+Markowitz · · Score: 3, Insightful

      Pfft, Barsoukov's stuff is sophmotic. Note, for instance, that he doesn't consider entrainment of the surrounding medium as a working mass in his "what it's not" section.

      ion wind + air pulled along with it = lots of airflow

      Don't believe me? Check out back issues of PopMech from the late 1960's, they build a fan with no moving parts out of lifter parts.

  114. Parts is parts. But one part is a "thing" by kfg · · Score: 1, Redundant

    I have a balloon floating around my room right now at about 5 ft. altitude above the floor. I assure you it has a grand total of one part, which could not be defined as moving.

    I have a number of small hot air balloons (small meaning under 10 ft. diameter) with one nonmoving part.

    God only knows how many solid fuel rockets with no moving parts I've launched at great velocity into the sky.

    I've made kites. No moving parts.

    Oh, and a hang glider. The only way this thing could be considered to have a moving "part" is if you think I am a "part."

    If you consider a flap of cloth a "moving part" than your radio dials sure as hell are too. I can't even begin to tell you how much time I've wasted over the past 30 years dealing with wonky pots. I gaurun-damn-tee you my flap of balloon cloth is more reliable than your radio dials.

    One of my kites ( you know, the kind with a bit of string tied to it) has lifted a man clear off the ground, and didn't require a single volt of electricity to do it. Just a bit of naturally occuring wind. ( Ok, it was a biiiig frikkin kite. I misspent my youth on such endeavors).

    How much weight has your dangerous high voltage bit of oven wrap lifted so far?

    I'm waiting.

    In the meantime there's a helium ( a safe and inert gas) filled bladder over in the corner of my room just hanging in mid air. It should be able to do so for days.

    No energy source required.

    And no moving parts.

    KFG

    1. Re:Parts is parts. But one part is a "thing" by Anonymous Coward · · Score: 0

      Yes, but that sort of thing is only efficiant for moving things in one direction, and that is rarly practical for vehicles. Balloons are certianly usful for some things, but not in the same way an regular engine would be.

    2. Re:Parts is parts. But one part is a "thing" by kfg · · Score: 1

      And these lifters are so inefficient that it takes 20,000 volts to not be able to lift a mouse.

      This is not what you would call a practical vehicle either.

      On the other hand a human being has lifted himself across the English Channel in a heavier than air craft using nothing more than his own power. I'm not going to do this. You're not going to do this, but neither is one of these lifters.

      On the other hand a lard ass like Gallager can cruise quite nicely in his pedal powered blimp.

      So far as I can tell lifters are a ludicrous solution to a non problem and will remain so.

      This doesn't mean they're not really neat thingies. They are.

      They're just not vehicles.

      Sailplanes already are.

      KFG

  115. These aren't the only crackpots out there ... by dougmc · · Score: 1
    These aren't the only crackpots out there working on flying saucers.

    Here is another guy who thinks that his patented propulsion method will let you fly to the moon. Basically it's a totally closed box where spinning disks generate lift. He seems to think that he doesn't need to push on anything to produce lift. Oh, and by the way ... last I heard, he's still looking for investors!.

    It's not as wacky as NATURE'S HARMONIC SIMULTANEOUS 4-DAY TIME CUBE, but it's definately out there.

  116. On the Subject of Ion Wind and Lifters by NuWinter · · Score: 1
    Much criticism has been thrown at "Lifters" simply because it is believed that these devices use Ion Wind to propel themselves and thus they are nothing more than intriguing toys not worthy of serious study by scientists. Well, this is completely false.

    What the author of the Wired article failed to mention, unfortunately, was that an experimenter by the name of Jean-Louis Naudin has been experimenting with Lifters for some time now, and has done a number of experiments which prove that Lifters do not use ion wind for their propulsion.

    The experiments he conducted include one where the aluminum and copper wire were unlinked from each other and the copper wire is placed in a sealed vacuum tube, then once the power is switched on a propulsive force is seen.

    And another experiment has the aluminum portion of the lifter fully enclosed in a cardboard box and the unlinked copper wire is then lowered near the box and an upward motion is still seen when the device is powered up.

    Then yet another experiment shows that the lifter device can still generate an upward propulsive force even when fully enclosed in a plastic bag.

    I should hope that based on the evidence presented here one can come to the conclusion that this matter is far from settled and that Lifters depend on something else entirely different from Ion Wind for their propulsion.

  117. Ohm's Law by Anonymous Coward · · Score: 1, Informative

    Ohm's Law is a very simple thing, it is:

    Voltage = Current * Resistance

    So unless you lower your resistance (say, by standing out in the rain or sweating a lot), you can't have high current without high voltage, and high voltage will almost always result in high current.

    So yes, it is the current, but the voltage generates the current.

  118. Can you provide some examples? by Chad+E+Dirks · · Score: 1

    "And then other times, he proves himself to be just as blind and arrogant as the people he seeks to debunk when he makes snap statements and dismisses without properly investigating first."

    What in the above account provided by Randi is inaccurate? It's very possible that I have missed something.

    If you are only complaining in general about Randi, can you please provide examples of him exhibiting this behavior?

    It is not enough to "claim" or "say" that you can "communicate with the dead", "read peoples' minds". Anyone, all day long, can create hype and spout psuedo-science, and many, many, many people do.

    Not only this, but so many of these claims have been encountered many times before and in many variations, and they have been shown again and again to be frauds, lies, nonsense and jibberish, 'cons', delusions, and ignorance.

    If you are serious about your claims, and if you are serious about arranging for proper scientific testing to verify and document your claims, then stop the hype, stop the press-releases, stop the propagandizing on your website, stop whining about "bad vibes", stop ranting and raving to your followers about Randi and the "conspiracy to suppress the 'truth'", stop the bull, and stop the crap, because he has seen it all before.

    Contact the James Randi Educational Foundation (JREF) and work with them to arrange the proper scientific testing and documentation of your claims on terms that you are involved in specifying and agree to.

    Unless your "psychic hotline" is already quite profitable, surely you won't pass up the opportunity to come and claim your $1million USD? Donate it to a charity if you like.

    And if your abilities and claims are just the sorts of things that a proper scientific test can not be arrange for, or can not be conducted in the presence of "bad vibes", then what, precisely, do you expect us to do? If you are the one making the claim, and you are the one with the ability, then there is absolutely nothing we can do until you prove it to us.

    Is Randi "Arrogant"? Maybe.

    Is Randi "Blind"? If he is, then prove it to him and prove it to all of us. Contact the JREF and work with them to arrange a proper scientific test of your abilities on terms that you are involved in specifying and agree to, and claim your $1million USD.

    I, for one, am waiting.

    1. Re:Can you provide some examples? by Anonymous Coward · · Score: 0

      Contact the JREF and work with them to arrange a proper scientific test of your abilities on terms that you are involved in specifying and agree to, and claim your $1million USD.

      Ever tried that? They don't make it as easy as their supporters claim. The restrictions placed on attempted demonstrators practically guarantee failure.

      Seriously, give it a try. Call 'em up, give a false name, and claim a paranormal power-- something straightforward and simple. The experiment they develop to test you will be complex, over-designed, and won't test something you ever claimed to be able to do. (If you claim to heal people, they'll have you trying to detect people instead. If you claim to read auras, they'll test your ability to see in the dark.) Anyone who points out the invalidity is considered to be backing out, and is labelled "debunked" even if the experiment was never performed.

      A real skeptic goes into a situation with an open mind, without any preconceptions, and attempts to learn the truth. Randi and his followers do have preconceptions; they're absolutely certain that the paranormal does not exist. They're not skeptics, they're professional debunkers, and you should not trust their accounts to be objective.

      I'm a skeptic and a scientist. I do not believe that lifters generate antigravity, that Uri Geller has psychic powers, or that a fortune cookie will tell me the lottery numbers. I did invent a paranormal power and make a claim to JREF, being curious what the process looked like from the inside. I was totally astounded by their lack of scientific objectivity. Any real psychic going through the test would certainly fail along with the frauds. (I've since spoken informally with a number of other claimants, and their experience was similar to mine.)

      Randi may be usually right, but he's unobjective, unscientific, and intellectually dishonest. I don't expect you to take my word for it, but please, try not to emulate those qualities yourself. That breed of "skeptic" gives real skeptics a bad name.

  119. Did a project on this at U of Illinois by Kyn · · Score: 2, Interesting

    Me and a few friends built some of these at the University of Illinois, Urbana-Champaign for our engineering open house. They were a big hit, winning us several awards.

    These things are basically asymmetric capacitors: a thin wire loop is one plate, foil on balsa wood beneath the wire is the second plate.

    For a power source, we took apart a CRT monitor. Gotta love those flyback transformers. :)

    Anyways, here's our website with nifty pictures. We plan to do this project again next year and hopefully win more awards.

    http://dilbert.cen.uiuc.edu/soc/psiphi/lifters/

  120. Do you charge by the hour? by Fantastic+Lad · · Score: 1
    Excellent P.R.

    It sounds as though you believe it too!

    As somebody who has seen the "impossible", knows "impossible" people, has done the "impossible", and who knows several people who have been shot and/or hospitalized as a direct result of being "impossible", I can assure you that both you and James Randi are babes in the wood.

    Particularly in these times, anybody dumb enough to try to prove anything to an ignorant and undeserving public, (for money, no less!), is pretty much demanding to get shot at. And if that isn't enough to keep the real thing away in droves, then Randi's brand of witch-hunt, kangaroo-court science is sufficiently ridiculous to do the rest of the job.

    If you need examples of his 'professionality', try doing some reading about Randi outside the temple dogma. And no, I'm not going to provide that for you either. It's out there. Go look for it. Seeing is a choice which can only be made by you, and unless you are willing to start the search on your own, your mind will forever be closed. You are entirely free to remain as ignorant as you choose. And guess what? In the end, nobody else cares because you are the only one who has to carry the weight of your own self-imposed disability. Despite what society teaches, the gold stars handed out for defending one's lack of knowledge under the banner of 'skepticism' aren't worth a damn.

    Good luck out there.


    -FL

  121. Re:Yes Antigravity (electrogravity) by shpoffo · · Score: 1

    ----If that were the case, anti-gravity would have been discovered years ago.

    You're only assuming that it wasn't actually discovered years ago, of course. We wouldn't necessarily know.


    Reading into the work fo T. Townsend Brown will liekly set anyone on the right track in this area. Regardless of what is to be said about brown's work (and the subsequent work of Hutchinson) theres enough scientific bric-a-brac to show that a bit more is happening with electricity and gravity than we're applying our brains toward.

    -shpoffo

  122. Remeber Ohm's law? by kinnell · · Score: 1
    V=IR

    ... So saying that volts are safe and amps are dangerous is a bit stupid. What none of the posts in this thread have mentioned is that it is largely the internal resistance of the power source which determines how dangerous it is. This lies in serial with the resistance of your body. The sum of the 2 determines how much current flows, and if one is significantly higher than the other, then the majority of the power will be dissipated in the higher resistance (P=I^2*R).

    Also important, is the path the current takes through the body, i.e. whether it passes through the heart or not. Sticking 2 fingers of one hand into a light bulb socket will not kill you (trust me on this ;-) ). Attaching mains connections 2 your testicals will also not kill you, but it will probably make you wish you were dead.

    Hold the electrodes of a 12V dry cell battery, or solar cell array between your hands, and you won't feel anything. Hold 12V car battery electrodes between your arms and it will probably kill you. That is because the former have very high internal resistance, and the latter has approximately no internal resistance. Likewise, the mains supply has negligible internal resistance.

    --
    If I seem short sighted, it is because I stand on the shoulders of midgets
    1. Re:Remeber Ohm's law? by DarthStrydre · · Score: 1

      12V from a a dry cell or 12V from a car battery are all the same. The internal resistance difference at the 30mA or so required to kill you wouldn't make the car battery any more lethal - the electricity still has to get through your skin, which provides the greatest resistance in the circuit.
      Seriously, though, you've never touched both terminals of a car battery? Safe to a human, but able to weld lesser metals. Bwuahahahaaaa!

    2. Re:Remeber Ohm's law? by wiredbuddy · · Score: 1

      You are right about the internal resistance, but you will not notice anything grabbing on to the terminals of a car battery. I just measured the resistance between my left & right hands... around 500,000 ohms. 12V divided by 500,000 equals 0.000024 amps, or 24 microamps. A GFI breaker in your kitchen or bathroom, which detects current flowing through some other path besides ground (like your body) will trip at around 0.005 amps. Anyway, if it acually was harmfull, do you think they would leave all that wiring under the hood open ?

  123. Some questions. . . by Fantastic+Lad · · Score: 1, Interesting
    Here's a nice rhetorical question. . .

    If somebody, (obeying the laws of thermodynamics), managed to build an anti-gravity device, how long would the military hold on to that technology before allowing it into the realm of public industry? 5 years? 20 years?

    Here's another question. . .

    Could somebody invent such a device, raise the capitol, hire the people, and create the industry required to bring the technology to market without the military finding out about it beforehand?

    Yeah. That's what I figure as well.

    And so finally. . . (And this is my problem with 95% of the tech-dreaming on Slashdot.)

    Why do so many people bother getting excited at all by the comings and goings of publicaly accessible science and industrial advancement? --When all such advancement is not really advancement at all, but merely the controlled release of ancient technology which somebody already came up with fifty years ago and which the military sees no further need to keep under wraps?

    Cuz, you see, any 'announcements' about any new developments which matter, are ALL 100% P.R. bullshit. Amazingly, everybody pretty much knows this, because the logical steps needed to reach that conclusion are painfully obvious. --And yet, most people quietly go along with the charade as though the U.S. military-industrial complex wasn't actually a multi-trillion dollar goliath which controls nearly every aspect of science and industry.

    Most of the tech-geeks I've ever met are just a bunch of grown-up kids playing at pretend, wishing for a Star Fleet future while trying like hell to ignore the 10 ton gorilla in the living room.


    -FL

    1. Re:Some questions. . . by Anonymous Coward · · Score: 0

      I was going to write a serious reply to your post, but detected the delicate smell of a troll at work.....checks FL's profile and posting history...

      Yup, it's a troll.

      Collect three (3) troll points and give yourself a cookie.

      Next!

    2. Re:Some questions. . . by nnnneedles · · Score: 1

      wow! Americans sure like those conspiracy theories.

      --
      Will code a sig generator for food
  124. Should I trust that guy? by lokedhs · · Score: 1
    The scientist they interviewed is probably right, but he does seem to get one fact wrong:
    "There's no performance in a vacuum," he concludes. I ask him about the more bug-eyed theories of lifter fanatics. Some claim that lifters create electrical fields that push against space-time; a few think the devices harness the hypothetical zero point energy field. Could there be a new type of physics here? "We don't expect to find one," Campbell says dryly. "And if you come across something, don't tell me about it - go straight to Oslo and the Nobel Committee."
    (my emphasis)

    The Nobel comittee is in Stockholm. The Nobel Peace Price comittee is in Oslo.

  125. I can't help feeling ..... by ajs318 · · Score: 0, Troll

    ..... that this thing is just some kind of electromagnetic repulsion thing. Coils of wire? It looks like an electric motor flattened out. If you place a coil of good conducting material in a strong alternating field, the induced current will induce its own magnetic field, and the induced field will always repel the external magnetic field. If you have too much resistance in the coil, of course, the repulsion due to the induced field is likely to be weaker than the attraction due to gravity.

    Talk of high voltage, high current and complex waveforms always impresses non-scientists. Even when it's a well-known phenomenon. Remember the "perpetual motion machine" {a lightly constructed wheel with elastic bands for spokes, set at an angle} that was actually a radiometer? It got its energy from the light bulb shining on it ..... but it fooled plenty of non-scientists.

    BTW, the use of the word "inch" gives it straight away that this person is not a real scientist. Real scientists use SI units exclusively, even {especially?} when talking to non-scientists.

    --
    Je fume. Tu fumes. Nous fûmes!
  126. Uh huh by Anonymous Coward · · Score: 2, Funny

    John Hutchison's experiments have been exceeding difficult to replicate..

    Well now theres a shocker.

  127. NASA: get out of the Dark Ages! by Rogerborg · · Score: 3, Funny

    'Last fall, they tested the contraption in regular air - shooting it with 27,000 volts at 20 microamps. Bingo: It generated 3 millipounds of force [...] "We're talking maybe even a pound of thrust out of one of these little devices the size of my thumb. We've got some promise here!"'

    Millipounds? Pounds? What's that in bushels per hectare?

    My god, no wonder they keep smashing things into Mars if their cutting edge research is done in pounds and by "rule of thumb".

    --
    If you were blocking sigs, you wouldn't have to read this.
    1. Re:NASA: get out of the Dark Ages! by FurryFeet · · Score: 1

      Worse, they're mixing metrics with english units. There's no such thing as a "millipound".

  128. Resistance is Key by Makarakalax · · Score: 1

    Yep, it's V=IR The current (I) is dependent on the resistance (R) and the voltage (V). If your body has a healthy resistance (which it does to my knowledge) then you will not get electricuted unless you pump up the voltage.

    I read in another comment that 50mA will kill you thus: V = IR
    120 = 0.05R
    R = 2400 Ohms

    According to this site: Under dry conditions, the resistance offered by the human body may be as high as 100,000 Ohms

    So you should be ok most of the time. Us in Europe with our 240V AC supplies have to offer more resistance, 4800 Ohms, although since in Britain we have earthing on all powered devices, elecution is far less likely.

    People who get eletricuted must have less than 2400 Ohms resistance then - presumably - unless I've missed out some important theory..

    1. Re:Resistance is Key by Makarakalax · · Score: 1

      Forgive my misspelling of electrocuted. I have spanked myself repeatedly for the crime. It will not happen again.

  129. Huh? by Y+Ddraig+Goch · · Score: 1
    "I do one last check of my DC transformer, which I bought online from a guy who specializes..." Last time I checked there was no such thing as a DC transformer, maybe a DC electromagnet but not a transformer. By it's very nature a transformer needs AC to operate. This looks and smells like a
    • Popular Electronics
    April Fools joke.
    --
    Meddle thou not in the affairs of Dragons, for thou art crunchy and with most anything.
  130. The Earth is NOT Flat! by SecGreen · · Score: 1

    - If you had read the article you would have seen that it maintains a certain height because there are numerous tethers attaching it to the ground.
    - If you _could_ turn off the effect of gravity on an object, it would _appear_ to fly off the earth as it travelled in a straight line. I did some rough calculations, (may be wrong, feel free to correct, assuming that your standing at the equator) and after 10 seconds the object would be about 9.3 ft in the air. after 20, 37 ft. after 30, 84 ft.

    With all that said, it appears that the devices they are discussing are actually ion engines (also talked about in the article), so the above calculations are meaningless for this topic.

    --
    Dupe posts are /.'s tacit protest on the rights of users to time-shift content...
  131. hmmm... by bpowell423 · · Score: 2, Interesting

    Somewhere I read once about the military developing transports that work like this. Probably read it on slashdot. Anyway... imagine a nuclear power plant in the heart of this thing generating the power for the ion lifter... Somebody in this discussion already figured the power at 180 W/lb. Let's say you want a craft that can carry 100 tons (200,000 lbs). That'd take 36MW. The nuclear reactors around here generate over 1000MW. Wonder how much they'd weigh scaled down to 36MW. Hmmm... that'd be one heck of a ship. Imagine how long (years) it could hover in the air without being refueled... until the reactor rods were spent...

    Okay, folks... don't flame me... just thinking out loud...

  132. The big problem with real anti-gravity... by Anonymous Coward · · Score: 3, Interesting

    is that it stops you being stuck to the Earth's surface. Since the Earth is: a) rotating (at 1038mph at the equator) b) orbiting the sun (at 67,000mph) c) in a solar system orbiting the galaxy (at 558,000mph) that is itself in a galaxy drifing in our local group (at 669,600mph) anyone who stops being affected by gravity, even for a split second, would end up pretty far away. I believe it's called 'absolute rest'.

    1. Re:The big problem with real anti-gravity... by nystagman · · Score: 1
      By your interpretation 'antigravity' would also cancel out intertia.

      But that's not the way it works on Star Trek...

      And...

      Just remember that you're standing on a planet that's evolving
      And revolving at nine hundred miles an hour,
      That's orbiting at nineteen miles a second, so it's reckoned,
      A sun that is the source of all our power.
      The sun and you and me and all the stars that we can see
      Are moving at a million miles a day
      In an outer spiral arm, at forty thousand miles an hour,
      Of the galaxy we call the 'Milky Way'.

      Our galaxy itself contains a hundred billion stars.
      It's a hundred thousand light years side to side.
      It bulges in the middle, sixteen thousand light years thick,
      But out by us, it's just three thousand light years wide.
      We're thirty thousand light years from galactic central point.
      We go 'round every two hundred million years,
      And our galaxy is only one of millions of billions
      In this amazing and expanding universe.

      The universe itself keeps on expanding and expanding
      In all of the directions it can whizz
      As fast as it can go, at the speed of light, you know,
      Twelve million miles a minute, and that's the fastest speed there is.
      So remember, when you're feeling very small and insecure,
      How amazingly unlikely is your birth,
      And pray that there's intelligent life somewhere up in space,
      'Cause there's bugger all down here on Earth.

      Thank you. That is all.

      --
      Theory and practice are the same in theory, but different in practice.
    2. Re:The big problem with real anti-gravity... by hesiod · · Score: 1

      > By your interpretation 'antigravity' would also cancel out intertia.

      I don't think it would, as inertia goes in a straight line. We are spinning at the same rate as the earth, and therefore have the same speed as the outside of the Earth. If we were no longer affected by the Earth's pull towards itself, we would still be going at that speed (minus wind resistance, etc of course) in a straight line (a tangent from the spot where we lost gravity, I think). At first, we would slowly lift from the ground, then due to wind resistance, the ground would start moving faster than us, effectively "moving" the person in the opposite direction of the Earth's spin. Eventually, you would get further away from that spot on Earth and from the Earth itself.
      But, of course, you also have to keep in mind that the Earth rotates around the sun, so the whole thing would be moving in another direction (probably away from us) as well.

      What? Of course I know what I'm talking about! uh... err... hmm... yeah.

    3. Re:The big problem with real anti-gravity... by bziman · · Score: 1
      Yeah, but anti-gravity wouldn't necessarily be anti-inertia.... since you're moving along at however many miles per hour, you'd tend to continue moving along at that rate unless some force were applied to prevent it. And in fact the forces of friction imposed by the atmosphere would probably tend to actually wiz you along with the planet.

      Experiment from high school: Stand at the front of a school bus going along at 55 mph with the windows closed, and drop something. Because of inertia, the object will appear to fall straight down inside the bus, instead of straight down in relationship to the planet (which would make it fall toward the back of the bus as it barrels along).

    4. Re:The big problem with real anti-gravity... by Anonymous Coward · · Score: 0

      No, gravity isn't what causes you to not be affected by these speeds.

      The speed of how fast everything is going can only be measured relative to points of reference. (Excluding things like the speed of light)
      The earth really isn't moving relative to YOU just relative to the sun. So that speed doesn't exist for you.
      If you stop gravity that speed still won't exist, it's just that you won't get pulled to the ground as usual.

      Imagine for a moment that the 1g of gravity would keep you on this ball moving at 558,000mph. If this were true, and the pull of gravity alone is what is causing you not to fly away then it would also keep you from moving 1mph on your own.
      Any foce that would keep you on something moving that fast would literally crush you.

  133. HV and metal plates by thogard · · Score: 1


    Can someone explain why this isn't an X-ray machine?
    TV voltages have to be very carefully controlled or else they produce x-ray.

    1. Re:HV and metal plates by flowerp · · Score: 1

      There is no vacuum. In atmosphere, electrons
      get braked too quickly to hit the anode with
      great speed. Hence no x-rays.

      --
      --- Eat my sig.
  134. Such as hovercrafts? by CausticPuppy · · Score: 1

    In retrospect, it seems that the people who designed the hovercrafts for The Matrix may have just been slightly ahead of their time.
    Those machines are covered with lifter-type objects which produce lots of lightning bolts. And since they are hovercrafts, not spacecraft, we can assume that they do require an atmosphere.

    --
    -CausticPuppy "Of all the people I know, you're certainly one of them." -Somebody I don't know
    1. Re:Such as hovercrafts? by Chris+Burke · · Score: 1

      That's very interesting. Not knowing about lifters, I couldn't have made the connection, and they never mentioned how the hovercrafts worked in the movie. Yet it does seem possible that they were intended to be stylized lifters. A lot of research went into that movie and the technology involved, as opposed to, say, the "rail guns" in Eraser.

      --

      The enemies of Democracy are
  135. Gravity? by tilleyrw · · Score: 0

    If gravity is caused by the presence of a mass, a sufficient amount of energy will duplicate the presence of mass, hence artificial gravity but not antigravity.

    If gravity is caused by gravitons, shielding can be developed and a form of antigravity created but not artificial gravity.

    My thinking is nodoubt too simplistic on these two topics. The two theories previously mentioned are mutally exclusive.

    Can anyone see a method that the future of Jetsons can be realized?

    --
    This post encoded with ROT26. If you can read it, you've violated the DMCA. Handcuffs please, sergeant.
  136. Yet Another Thing by wbav · · Score: 1

    That think geek should sell.

    Add a little paint, and a nice dial with glowing lights, then price it at $200 per unit. They could make a fortune, and save a few geeks from the darwin awards. Heck, it might even be considered a public service.

    --

    =================
    Unix is very user friendly, it's just picky about who its friends are.
  137. When I was a kid I was thrown across a room by 120 by FreeUser · · Score: 1

    Absolutely right!

    People who disseminate the dangerous myth that 120 volts (or even .012 volts, if the amperage is high enough) can't kill should be held at least in part liable for anyone they mislead into performing an uncautious act that gets them hurt or killed.

    Like my loser ex-stepfather, who couldn't be bothered to get a switch fixed that he knew to be dangerous.

    When I was a kid, we had an intermittent short in the switch to our garbage disposal. If one had their hand on the metal faucet (e.g. turning on the water) and threw the switch at the same time, one could get one hell of a shock. Indeed, I was unconscious from the time I threw the switch to the time I slammed against the wall on the far side of the kitchen. That was how I as a ten year old kid learned that we had a dangerous switch installed.

    While 120 volts and tens of amps do not always kill (just as lighting does not always kill), it certainly can, and the question of whether I was unconscious for a second or two, or actually dead but lucky enough that my ten-year-old heart could restart itself (perhaps from the counter shock of having my back slam against a wall) is an interesting question, but either way it was certainly lights-out for a brief period of time.

    OTOH I've had tens of thousands of volts pass through my body in one of those low amperage static electricity demonstrations, and other than having my hair stand up on end and a very slight tingle in my fingers all was perfectly well. So you are certainly correct, ohm's law applies and it is amerage (as well as frequency...60 Hz was a really lousy choice from a safety perspective, and 50 Hz is almost as bad), not voltage that defines the lethalness of an electrical jolt.

    --
    The Future of Human Evolution: Autonomy
  138. Re:Official SLASHDOTTER postal flip out! by Anonymous Coward · · Score: 0
    If somebody were innovative, they could write a script to google up and build a R.U.P. page for any given topic. R0X0R!

    Unfortunately, I'm not inovative.

  139. Something dosn't add up by tmortn · · Score: 1

    for lifter 4 he claims and shows pictures that it lifts a pound off of a 250 watt power supply dilivering around 100,000kv. Thats roughly 3 pounds of lift per 750 watts ( or about a horsepower ) and 4 per kw or 9.2 lbs of thrust (at least) for 2.3 kw. Why is this interesting ?

    DS-1 generates .02 lbs of thrust per 2.3kw.

    I understand DS-1 generates its ions from an onboard fuel but it seems the process is far less efficient than ionizing plain old air. Seems like NASA could do better with some more voltage and a bottle of highly condensed air than they can with xeon.

    --
    I don't ask you to be me. I only ask you not expect me to be you.
  140. Where's the case mod plans? by Uninvited+Guest · · Score: 1

    People already run these things off of a monitor power supply. Somewhere in here are the makings of a sweet case mod.

    --
    Sometimes I worry that I'll develop Alzheimer's disease, but no one will notice.
  141. The best site on lifters... by Steve+Mitchell · · Score: 1

    Oh come on now, THE best site to go to for this stuff is:

    http://jnaudin.free.fr/lifters/main.htm

    He's a little kooky with his free-energy and UFO stuff, but you have to give him a hand with all the various experiments, videos, and analysis, designes, etc. that he's accomplished. I also love his Frenchy "This iz Jean Louis Naudin. I now turn ON zee lifterrr" in his real videos too.

    A few friends of mine and I managed to build a working lifter using the usual balsa, foil, wire and an old monitor. We talked to a Physics Prof, and his conclusion was the best test to determine if it's ionic wind that's propeling the device or not (since vacuum will cause breakdown) is to test it inside a container of helium. The order of magnitude less of atomic weight should significantly reduce any effects of ionic wind, hence test if that's what causes it to fly.

    --
    -- Making computers see, hear, and think... http://www.componica.com/
  142. ObPython by AkkarAnadyr · · Score: 1


    "Mate, this bird wouldn't voom if you put four million volts through it!"

    --

    I bought this house and you know I'm boss
    Ain't no h'aint gonna run me off

  143. Show of hands by orim · · Score: 1

    Now who started reading the real boring technical paragraph, then switched to the children's version? :)

    Was it Vonnegut who said that until a scientist can explain what they're doing to a child, they're really a charlatan?

    --
    "If you could only see what I've seen with your eyes..." - Roy Batty
  144. Ionic Breeze Modding by cylcyl · · Score: 1

    Cool!! Antigrav works by using ionic wind. So where do I go to find a mod for SI Ionic Breeze to convert it antigrav device? I foresee a rapid increase in ionic breeze sales

  145. That's absurd by niom · · Score: 1

    I very seriously doubt any human would survive a hundred thousand volts DC at practically any current.

    That's like saying "I doubt any human would survive the impact of a hundred thousand kilos at practically any speed". Yet I manage to survive somehow as the earth hits my feet when I walk.

    --
    -- Repeat with me: "There is no right to profits".
  146. make it lighter than air by freality · · Score: 1

    use dirigible technology to make it lighter than air, or even much lighter. Then, use the no-moving-parts-electro-motor to move it. Isn't the army working on something like this?

    Depending on the application, you'd much rather have that extra 36MW for thrust than for just staying aloft. Then it's like a ship at sea.. always bouyant and in a safe state even if power fails.

    To put this a bit in perspective, the engines of a Boeing 777 generate between 75 and 100k pounds of thrust. 2 of those equal your 36MW figure. A ship with the full 1000MW capability would have thrust equivalent to 27 777s. Not bad. Aircraft-carrier of the skies. I bet it already exists.

  147. Debunking debunked? by frEEk_zero · · Score: 1

    If there really is antigravity at work here once the ionic wind component is removed, wouldnt the pinwheel configuration in the vacuum test produce exactly the results witnessed by the author? The two "engines" would work against each other resulting in zero net movement. I can't believe a whole slew of NASA nerds could overlook this issue, which leads me to believe I'm missing something. Any thoughts?

    And for the record, I most certainly do NOT believe this is antigravity. Some other form of electromagnetic propulsion maybe, but not antigravity.

    1. Re:Debunking debunked? by Garridan · · Score: 1

      Uh, no. The engines push in opposite directions, parallel to eachother, on the tips of the pinwheel. Resulting in a spinning pinwheel. No air, no wind, no spin. Read the article... the pinwheel spins fine outside of the vaccuum.

    2. Re:Debunking debunked? by frEEk_zero · · Score: 1

      in ionic wind mode yes, thats the case. but IF this were antigravity, it would only have one direction of thrust: up. so mounting the two engines on either side of the pinwheel, they would both produce upward thrust, cancelling each other out. ionic wind thrust of course works in any direction, hence the pinwheel spins in atmosphere.

  148. No moving parts? by hesiod · · Score: 1

    This is definitely a government conspiracy or a hoax, since the whole idea is full of hole(s). It says no moving parts, but the whole thing moves, except the power source. SEE! I ask you, IF THEY'RE WILLING TO LIE ABOUT HAVING NO MOVING PARTS, WHAT ELSE WOULD THEY BE WILLING TO LIE ABOUT?!?!?! Maybe it not working at all, HMMMMMM??? Or maybe it really IS anti-gravity and the "vaccuum" test was all a coverup by NASA to keep us down! That's obviously the answer! AHA!

    (FL: See, that's a joke, son. You're supposed to laugh.)

  149. Actually, Popular Mechanics... by cr0sh · · Score: 1
    Not sure if it was in PS, but I have in front of me an original Popular Mechanics, dated August of 1964 (for 35 cents). The picture on the front shows the fanciful image of a future craft - with a man inside. Looks like a big mesh disk, supported by ribs radiating outward from the center (think of a flat mesh umbrella, and you have an idea). Underneath that is suspended the cab. Far below is a freeway intersection with cars (traffic report?). The catchline, in red (with arrow, just in case you couldn't figure it out) - is "Major de Seversky's Ion-Propelled Aircraft". On an interesting side note, one of the main headlines (below the title) is "Checker Game of the Century: Man Vs. Computer" (hehe).

    Inside, the article is black and white (more or less - some shades of green as well). It was written by a Mr. Hans Fantel. The first line: "It was downright spooky." (I can't make this stuff up).

    To be honest, the models shown flying in the article seem much more graceful than the ones I have seen at sites like JLN's - they use some form of charged grid, and they show them flying much higher (whether this is real or a photographic trick is unknown). All of the models (as well as the drawings, including the cover) seem to have strange "arrow" pointing "electrodes" sticking up from the top of the grid (so the "arrows" point upward). A diagram shows a simplified drawing of what is happenning - it reads:

    "Ions rushing toward positively sharged grid collide with neutral air molecules and thrust air particles downward, ions stop at grid" and "Neutral air molecules, whacked downward by ions,pass through mesh of ion acceptor grid. Downwash of air keeps ionocraft aloft"

    The grid is supposed to be the positive, and the downward pointing leg ends of the arrow are the negative (the legs, I suppose, are insulated parts of the craft structure).

    The article says the craft is made of "about $5 worth of balsa and aluminum wire", and measures "only 1296 square inches" in area. The article mentions "ionocraft engineers" - which seems at the time of the writing, that more than one individual was playing with the things. The article further explains that "at present it takes 90 watts (30,000 volts at 3 milliamperes) to fly a two-ounce model. Translated into ordinary power-to-weight ratios, this works out to roughly .96 hp per pound, as compared with a typical .1hp per pound of helicopter or .065 hp for a pound of Piper Cub".

    So, yeah - the problem was, and still is - the power supply. I wonder, though, if those numbers could be made better, and if a lightweight 12V lithium-ion was developed - if using an inverter (or something like it) for a CCFT (like the lightweight inverters used in today's laptops for the backlight) could be used as an "onboard" power source? If the numbers could be made better, then I bet it could be done (run-times would suck, but it would be a fun toy). Micro-miniature hobby helicopter building has shown that you can do a lot with very little - so I would think that creating an onboard supply for such a "craft" might be possible today...

    --
    Reason is the Path to God - Anon
  150. This can be compensated by Bones3D_mac · · Score: 1

    Using anti-gravity does not necessarily mean you would have to instantly jump to zero (or negative) G.

    One application for this would be to create an airplane-like vehicle that would initially reduce gravity, accelerate upward, slowly increase gravilty to slow its rate of ascent, then, would again reduce its gravity to a fraction of a G and glide to its destination descending very slowly the entire way.

    Of course, a sudden jump to zero G would be an incredibly stupid thing to do, as this would complete "cut the teather" holding you to the earth's surface, causing you to be flung off the planet.

    --


    8==8 Bones 8==8
    1. Re:This can be compensated by brakk · · Score: 1

      "cut the teather" holding you to the earth's surface, causing you to be flung off the planet."

      So, what keeps astronauts from being "flung" against the side of the space shuttle when it's in orbit around the earth?

    2. Re:This can be compensated by AuraSeer · · Score: 1

      The space shuttle is not in an antigravity situation. If there were no gravity, it wouldn't even orbit; it would go in a straight line, instead of circling around the planet.

      You, where you sit right now, are effectively also in an orbit. As the planet rotates, you travel around its center, once per 24 hours. If you became immune to gravity, there would be nothing to keep you moving in that circle. You'd instead move at the same speed in a straight line tangent to the original circle. From the point of view of someone on the surface, you'd be "flung" off into space.

      For a full explanation of the above, look up "centripetal force" in the physics reference of your choice.

      An astronaut in the shuttle is not immune to gravity, he's simply in free fall. Basically, while the astronaut is pulled by gravity and falls toward Earth, the shuttle does the same. Since they're both accelerating at the same rate, the environment in the shuttle sees no relative acceleration toward the floor, and hence perceives no gravity. (An orbit is the same thing as a fall, but with lots of lateral velocity. The shuttle moves forward as well as down, so it continually "misses" the ground and keeps falling, around in a circle theoretically forever.)

  151. Flying air cleaners by Anonymous Coward · · Score: 0

    Sharper Image has these in their catalog. If look inside one the sharper image air cleaners (Ionic Breeze) you'll find something like a lifter -- a wire and some flat conductive plates. When running the air cleaner, you'll feel the breeze; it's slight but easily felt.

  152. Uses won't be what you think by You+Been+Rob-ed! · · Score: 1

    I bet this principle will not be first used for anything really interesting like flight. It will be used on the small scale for things like small switches, automotive brakes (like air breaks), places where a relatively small force is needed and no moving parts are a boon.

    --
    For fun, calculate how much DDT would be lethal for you!
  153. Just ionic wind. by DanPeng · · Score: 2, Informative

    These lifters just ionize air and direct the ions downwards with an electric field, generating upwards thrust. There's no anti-gravity involved at all. It's the same technology used in The Sharper Image's Ionic Breeze air purifiers.

    My friend and I did some measurements of this effect, and with 23,000 Volts, 700 microamps, and 36 centimeters of foil and wire, it's possible to generate 2.7 grams of force. With balsa wood, it's certainly possible to build a support weighing less than that, and, voila! You have flight. Nothing magic.

    For more details on our measurements, check out http://peng.dyndns.org/~dan/writings/phy210.pdf .

  154. I dunno by Wah · · Score: 1
    --
    +&x
  155. Lighten up by August_zero · · Score: 1

    Please see the line above

    That and perhaps read what I said again because clearly you have no clue as to what I was talking about.

    --
    On Wall Street they say "buy low, sell high" On the pad we say, "buy high, sell high" Isn't that somehow better?
  156. cat and toast by Master+Rux · · Score: 1

    Everyone knows that anti-gravity is achieved by straping buttered toast to a cat's back, with the butter side up. Not sure how much thrust they generate, but the more the merrier!

    --
    IMO the best browser game ever http://wittyrpg.com
  157. Thinking. . . by Fantastic+Lad · · Score: 1
    wow! Americans sure like those conspiracy theories.

    That's right.

    Go back to sleep. Thinking is bad for you.


    -FL

  158. What is a 'Troll' exactly. by Fantastic+Lad · · Score: 1
    I was going to write a serious reply to your post, but detected the delicate smell of a troll at work.....checks FL's profile and posting history...

    Yup, it's a troll.

    Collect three (3) troll points and give yourself a cookie.

    Next!


    "Next?" --Like you're some sort of authority charged with processing a stream of ideas, which you enjoy doing with flip dismissal. How empowered you must feel! I'm glad you don't actually have any real authority, or surely innocent people would hang thanks to your thoughtlessly dispensed 'wisdom'.

    What I find interesting is how carelessly posts are relegated to 'Troll' status these days. I'm not even entirely clear what a 'Troll' is. --I thought at one time that a Troll was an ego-deficient poster looking to deliberately draw negative responses from people because any attention was better than none at all. But it seems today that any posting which challenges the status quo is considered a 'Troll'.

    I think people who cry 'Troll' are often just frightened of new ideas.


    -FL

  159. Desktop UFO by Colonel+Failure · · Score: 0

    Ok, so they are not anit-gravity. But they look cool and would make great desktop toys. (Except for the High DC voltage running through them.)

  160. TT Brown and his Vacuum by Shafe · · Score: 1

    The litmus test for me to determine whether this is some sort of antigravity technology comes down to the vacuum, since space flight is the ultimate goal here. This Wired article claims that NASA attempted to use this in a vacuum but failed. However there have been numerous reports from others over time, including the inventor of this, TT Brown, that it _does_ work in a vacuum. Is it possible that NASA didn't properly configure the device, or did TT Brown simply fudge his results in order to get more attention?

    Even if it's not antigravity, the applications of a feasible derivative of this technology are quite amazing. However, as others have stated, until the lifter can lift its own power supply plus payload, and also have a suitable control system, it will remain the subject of test labs and back yards. Supposedly, though, JL Naudin at www.jlnlabs.org, pretty much the Internet publisher of the lifter technology program for the masses, has determined that the larger the size of the lifter is, the more weight it can carry with the same amount of voltage. So since the relationship between voltage and mass isn't linear, it's conceivable that enough cells could actually fly. Check out his site with information on the LifterCraft project.

    I don't know if it's antigravity, but it's definitely fun to watch those things lift!

  161. Serious about the topic? Army Research Labs by Anonymous Coward · · Score: 0

    Of course, it ISN'T ion wind. Ion wind is 3 orders of magnitude too small to account for the forces on these lifters. Ion drift is in the right ballpark, but hasn't been verified as the cause.

    http://www.arxiv.org/list/physics/0211

    On the top of this list is 'Force on an Asymmetric Capacitor' conducted by United States Army Research Labs. It's highly technical reading, but even if you don't follow the math, you can read the conclusions and get a general picture for what's going on and what they're talking about.

    And a vacuum test? I'll keep my eyes out for something legitimate.