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Practical Jetpack Available "Soon"

Ifandbut was one of several readers to point out the arrival in Oshkosh of the first practical jetpack. It was invented by a New Zealander Glenn Martin, who has been working on the idea for 27 years. He plans to sell the gizmos for somewhere in the neighborhood of $100K. While previous attempts at jetpacks have flown for at most a couple of minutes, Mr. Martin's invention can stay aloft for half an hour. Both "practical" and "jetpack" may need quotation marks, however: The device is huge and it's incredibly noisy. And, "It is also not, to put it bluntly, a jet. 'If you're very pedantic,' Mr. Martin acknowledged, a gasoline-powered piston engine runs the large rotors. Jet Skis, he pointed out, are not jets, and the atmospheric jet stream is not created by engines. 'This thing flies on a jet of air,' he said. Or, more simply, it flies."

237 comments

  1. Huh? by clang_jangle · · Score: 4, Insightful

    TFS concedes this is neother "practical" nor a "jet pack", yet still trumpets the headline "Practical Jetpack Available 'Soon'"? Well, I guess all it needs is a line at the end saying, "Ha -- made you look!".

    --
    Caveat Utilitor
    1. Re:Huh? by Emperor+Zombie · · Score: 5, Funny

      Yeah, but "Impractical Not-Really-A-Jetpack Maybe Available Sometime" doesn't have quite the same ring to it, does it?

      --
      I'm so excited I just made water in my pantaloons!
    2. Re:Huh? by Sockatume · · Score: 4, Funny

      It's an editing error. The original submission was "practical" "jet" "pack" "available" "soon".

      --
      No kidding!!! What do you say at this point?
    3. Re:Huh? by blind+biker · · Score: 4, Interesting

      To be honest, I definitely would be interested in a story titled "Impractical Not-Really-A-Jetpack Maybe Available Sometime" - it's just too odd to pass up. Now be honest: who here wouldn't have thought "What the...?? Lemme see what's this all about."

      BTW, I really like the word "pantaloons". But, I am easily amused - even "trousers" makes me smile.

      --
      "The agriculture ministry is not in charge of Gundam" - Japanese ministry official.
    4. Re:Huh? by grahamd0 · · Score: 4, Funny

      I'd feel sufficiently menaced by villains flying in on those things as to call them "practical" in the super-villainy market.

      Of course they'd have to come in black... and a laser beam would be a nice option.

    5. Re:Huh? by chunk08 · · Score: 1, Funny

      laser beam would be a nice option.

      Wait... flying sharks with lasers?
      *runs and hides*

      --
      Do away with our corrupt tax code. Support the Fair Tax
    6. Re:Huh? by 192939495969798999 · · Score: 4, Funny

      IMHO it's "very practical", in the sense that how practical can strapping your ass to a 200-hp gas engine with two washing machine-sized rotors really be?

      --
      stuff |
    7. Re:Huh? by Anonymous Coward · · Score: 4, Insightful

      It brings to mind the Ogden Nash rhyme:

      A child does not have to be very clever
      to realise that "soon" means "never".

    8. Re:Huh? by Danny+Rathjens · · Score: 1

      That's why this story is in the entertainment section of /. :)

    9. Re:Huh? by ModernGeek · · Score: 1

      People have been doing this as 2nd grade science projects for years:

      http://youtube.com/watch?v=HY7V7UPdfjQ

      --
      Sig: I stole this sig.
    10. Re:Huh? by vikstar · · Score: 4, Insightful

      They get around the whole 'jet' naming problem by saying that 'This thing flies on a jet of air'. Yep, and I love my home latpop computer, it's so super... so it's a supercomputer.

      --
      The question of whether a computer can think is no more interesting than the question of whether a submarine can swim.
    11. Re:Huh? by greenguy · · Score: 1

      Hey! It's "not" amusing to make "fun" of quotation marks. They even have their own "blog!"

      --
      What if I do the same thing, and I do get different results?
    12. Re:Huh? by Psion · · Score: 1, Funny

      I just wanted you to know that I had mod points and I chose not to mod you down.

      Never gonna mod you up, never gonna mod you down, never gonna spurn your posts or ... slashdot you.

    13. Re:Huh? by Bonobo_Unknown · · Score: 1

      or maybe it was: "Practically a jet-pack, available soon..."

      --
      We don't believe in radical loony monotheistic religions from the middle east -- we're Christians.
    14. Re:Huh? by Deadfyre_Deadsoul · · Score: 2, Funny

      I for one would like to heartily welcome our soon to be, yet oh so impractical and semi over priced jetpack wearing overlords.

      --
      ~DF
    15. Re:Huh? by decoy256 · · Score: 4, Insightful

      Like they said in the article... the first manned flight was a whopping 12 seconds long and probably wasn't very "impressive"... but I bet you'd still like to have been at Kitty Hawk. The point is that this is a great first step towards practical personal flight. While it may not be practical right now to own one (100k is out of my price range), how expensive were the first PCs? Now they're dirt cheap. I really can't stand all the whiners on /. who down play everyone else's achievements... what was the last thing you invented? Jackass. Honestly, you people get more excited about some obscure scientific discovery that won't have any practical applications for decades and yet something that is tangible and available NOW is just pissed on. Get real and get a life.

    16. Re:Huh? by Anonymous Coward · · Score: 0

      If there were girls on slashdot this would be modded +1 Cute!

    17. Re:Huh? by wagnerrp · · Score: 1

      Except for the fact that a jet ski is in fact a jet. Its propulsion unit is something called a 'pumpjet', which uses a high pressure jet of water. Are we supposed to trust our well being to this man when he doesn't know the difference between jet powered and turbine powered?

    18. Re:Huh? by camperslo · · Score: 1

      I'd feel sufficiently menaced by villains flying in on those things as to call them "practical" in the super-villainy market.

      Suicide bombers with explosives are enough of a problem, I'd hate to see someone evil turned loose with a flying Vegomatic. At least the annoying noise would provide some warning they're coming.
      It's a safe bet these things crank out the greenhouse gases too...

      Thinking about the terrorist angle and the Olympics coming up it occurred to me that an element of the ancient games might be used to combat terrorism: Nudity!

      If people in some areas/activities in Iraq were required to be in the nude or very close to it, it'd be very difficult for any among them to be wearing explosives. The weather there is probably warm enough for it. It is a pretty radical idea for a society where some believe that even some faces should be hidden, but the low-tech approach is otherwise simple and cheap.
      Where is a good place to start? How about nude-voting?
      Hopefully nude voting releases less greenhouse gas than jetpacking...

    19. Re:Huh? by MenThal · · Score: 1

      IMHO it's "very practical", in the sense that how practical can strapping your ass to a 200-hp gas engine with two washing machine-sized rotors really be?

      Should go great with the SUV crowd then.

    20. Re:Huh? by phillous · · Score: 1

      Makes me think of the release date for the WoW expansion. Blizzard said soon, sometime last year; "Soon" - Copyright 2004-2008 Blizzard Entertainment, Inc. All rights reserved. "Soon" does not imply any particular date, time, decade, century, or millennia in the past, present, and certainly not the future. "Soon" shall make no contract or warranty between Blizzard Entertainment and the end user. "Soon" will arrive some day, Blizzard does guarantee that "soon" will be here before the end of time. Maybe. Do not make plans based on "soon" as Blizzard will not be liable for any misuse, use, or even casual glancing at "soon."

    21. Re:Huh? by El+Puerco+Loco · · Score: 1

      Seems like a short length of rope and a sturdy doorknob will get you to the same place as this, for a lot less money

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

      Make a skinny guy look fat and I think you have lots of room for explosives.

    23. Re:Huh? by LordOfTheNoobs · · Score: 2, Funny

      This baby is a fully loaded supercomputing* monster!

      * term may only apply to regions trapped between the years 1950 to 1980.

      --
      They're there affecting their effect.
    24. Re:Huh? by Hubbell · · Score: 1

      If only others in the US or Europe hadn't already made the first manned flights in self powered airplanes.

    25. Re:Huh? by Anonymous Coward · · Score: 0

      What about trouser snakes on a plane?

    26. Re:Huh? by elrous0 · · Score: 1

      If spending $100,000 on this toy is someone's idea of "practical," they're a lot richer than I am.

      --
      SJW: Someone who has run out of real oppression, and has to fake it.
    27. Re:Huh? by jandrese · · Score: 1

      But the laws of physics, while they were a boon to computer manufacturers, are a harsh mistress to anybody considering building a portable practical (economical!) jetpack.

      Even the one in the article is more like a one person helicopter with a very very sparse cockpit.

      That said, I'd be willing to be that if he was able to ramp up production volumes you could buy one of these for a somewhat reasonable price (kit plane prices--still out of the league of Joe Schmoe, but well within the realm of rich people who buy exotic cars and other such toys).

      --

      I read the internet for the articles.
    28. Re:Huh? by Anonymous Coward · · Score: 0

      If you look at the title as it's own textual world, "soon" isn't in quotes so much as the rest of the text is.

    29. Re:Huh? by smellsofbikes · · Score: 1

      The question is: what's a jet?
      If you have a propeller that's in a duct, and it's accellerating air that's shooting out of the back, providing propulsion, is that a jet? coz that's what powers 747's.
      There are two different parts of propulsion systems: how you burn fuel, and how you couple the mechanical energy you got from the fuel burning, to accellerating air.
      Piston engines burn fuel with a positive-displacement system. Jet engines use a non-positive-displacement system, relying on pressure differentials and forced induction.
      But it's not exactly a hard boundary between them. The Napier Nomad engine used pistons and an axial-flow turbine, coupled together, to extract work from burnt fuel, to drive a propeller. It was half-piston half-jet. Likewise, people have taken a piston engine with a big turbocharger, and put the propeller on the turbo -- so it's a jet, that's using a piston engine to produce hot air to drive the turbine.
      The engines we generally think of as jets, the things that drive 747's and the like, have a small jet engine driving a big propeller, which actually provides 80% of the engine thrust.
      There is actually a continuum between a traditional small plane with its piston engine and a military turbojet. It's just that we don't see a lot of the points along the continuum because they weren't financially viable.

      --
      Nostalgia's not what it used to be.
    30. Re:Huh? by Usquebaugh · · Score: 1

      Rick Astley?

    31. Re:Huh? by elgatozorbas · · Score: 1

      Potato potato... the thing *flies*. They just call it a jet pack because people know what that is. A "propellor pack" wouldn't ring many bells. No one is going to buy this, have it delivered, and complain that it doesn't contain a jet engine. At 100k, I guess buyers will inform themselves.

    32. Re:Huh? by Anonymous Coward · · Score: 0

      TFS concedes this is neother "practical" nor a "jet pack", yet still trumpets the headline
      "Practical Jetpack Available 'Soon'"? Well, I guess all it needs is a line at the end saying,
      "Ha -- made you look!".

      Man, people are hard. This thing is smaller than a car (although not smaller than a lot of motorcycles) and it flies for a half-hour... how is that not practical? That would get me to work and home again, assuming that it can achieve at least 35 knots. Ok, so it isn't a jet pack, but that's almost irrelevant considering the form and function are so similar. Now, $100k isn't practical for me, but I can always hope the price comes down.

      I want one.

      --- SER

    33. Re:Huh? by myth_of_sisyphus · · Score: 1

      Trousers eh? How about 'slacks'? A girl once broke up with me because I said "I need to get some slacks." She burst out in laughter and then couldn't look me in the face without smirking thereafter. It was a dealbreaker.

      Don't use the word 'slacks'.

    34. Re:Huh? by Sockatume · · Score: 1

      The laws of physics a harsh mistress to anybody considering flying one, too. Running out of gas is an entirely different prospect at 30 feet in the air, never mind 3000. To say nothing of power cables or those damn ducks.

      Consumer computers, cars and air travel took off in part because of the steadily lowering price, but also because they were practical and desirable for the average joe. I think the portion of people willing to put their life in the hands of their own flying skill is at the one-per-million level. The benefits are massively outweighed by the risk for most.

      --
      No kidding!!! What do you say at this point?
    35. Re:Huh? by Anonymous Coward · · Score: 0

      Come on; so backwards; Jetpaks has been available commercially for a long time in Scandinavia; check here: http://www.jetpak.com/ you can even order online :-)

    36. Re:Huh? by malakai · · Score: 1

      I this case, you would be safer at 3,000 feet than 30. As it has a built-in ballistic parachute.

      I wonder what the minimum height is for an explosively launched parachute to slow you down to 'break a bone' speed from 'brain squezes out of eye sockets' speed.
       

    37. Re:Huh? by Sockatume · · Score: 1

      I suppose they could go nuts and put a proper zero-zero ejector seat in there, but then I'd probably set it off under a tree or something.

      --
      No kidding!!! What do you say at this point?
  2. Jet Packs Are Still Hype! by mattnyc99 · · Score: 1, Interesting

    We've discussed this before! I mean have you watched that video? The thing barely gets off the ground!

    1. Re:Jet Packs Are Still Hype! by deft · · Score: 1, Redundant

      There's a BIG difference bwteen holding it a few inches off the ground as a demonstration, and not being able to go a few inches off the ground.

      Wait, are you the the old guy from the muppet show balcony?

      --

      There's nothing Intelligent about Intelligent Design.
    2. Re:Jet Packs Are Still Hype! by clarkkent09 · · Score: 4, Informative

      Wrong jetpack. This is the one tfa talks about: http://www.youtube.com/watch?v=vyb6vnX1My0

      It barely gets off the ground too though

      --
      Negative moral value of force outweighs the positive value of good intentions.
    3. Re:Jet Packs Are Still Hype! by GroeFaZ · · Score: 1

      Thanks for the video; this is what the article should have been. It combined technical detail with moving video.

      --
      The grass is always greener on the other side of the light cone.
    4. Re:Jet Packs Are Still Hype! by cephah · · Score: 1

      At it's current state it requires two people constantly following it, protecting it when/if it should fall to the ground by accident. You have to wonder about the safety precautions when they claim it'll reach 500 feet in 6 months. I wouldn't want to try it, that's for sure.

    5. Re:Jet Packs Are Still Hype! by Anonymous Coward · · Score: 1, Informative

      i didn't follow the link because - lamentably it has to be said - i recognize 'eBGIQ7ZuuiU' as being synonymous with 'rick frickin' astley'.

      is this troll ever going to go stale? it's already gettin old.

    6. Re:Jet Packs Are Still Hype! by djdavetrouble · · Score: 1

      Yes, but on this thread I get to say, Oshkosh? B'Gosh !!

      --
      music lover since 1969
    7. Re:Jet Packs Are Still Hype! by Anonymous Coward · · Score: 0

      at least 100 feet int the air!

      Programmer hands, eh

    8. Re:Jet Packs Are Still Hype! by pato101 · · Score: 1

      Seems to me, they have not yet tuned the control system. This thing may be inherently very unstable...
      Of course this kind of propulsion, as in helicopters, benefits from the proximity of the ground, but I guess this one can get higher than what is shown at the video. But, heh, power without control is almost nothing....

    9. Re:Jet Packs Are Still Hype! by Mattsson · · Score: 1

      Looks dangerous. I'd want an ejection mechanism and a parachute to accompany such a device. ^_^

      --
      /.Mattsson - My native language is not English, so please don't whine over linguistic errors. (That's lame anyway...)
    10. Re:Jet Packs Are Still Hype! by indifferent+children · · Score: 1
      But, heh, power without control is almost nothing....

      Are you kidding? Power without control is the be-all and end-all (of the pilot, anyway).

      --
      Censorship is telling a man he can't have a steak just because a baby can't chew it. --Mark Twain
    11. Re:Jet Packs Are Still Hype! by EMeta · · Score: 1

      Or if you'd read the article, you'd know that it does have a parachute.

  3. Needs stability control by eggfoolr · · Score: 5, Interesting

    Lucky the $100k includes a couple of guys to hold it for you!

    I suspect he either needs a fly by wire computer that manages stability or a third fan. Either way I think we're a wee way off from a production model.

  4. At first by Anonymous Coward · · Score: 1, Funny

    It looked like someone linked to The Onion.

    I'm not sure if it would be any more funny had it actually been linked from The Onion.

  5. Coolest Desire left to mankind? by FlyingBishop · · Score: 1

    I'd put that at cold fusion, maybe strong AI. And more in line with this, a space elevator. Jetpacks might be pretty cool, but honestly, I'd rather just take a ride up where there's no gravity and float around for a bit.

    1. Re:Coolest Desire left to mankind? by timmarhy · · Score: 1

      I really hope zero gravity experiences become less expensive. 20k - 50k and i would do it, that's the price point. it's one of the things i'd love to do before i die along with stand on the top of everest, see the northern lights and ride a bike from the tip of france to the most eastern point of russia.

      --
      If you mod me down, I will become more powerful than you can imagine....
    2. Re:Coolest Desire left to mankind? by maglor_83 · · Score: 1

      ride a bike from the tip of france to the most eastern point of russia.

      Any reason you want to start in France and not Spain or Portugal? If you're going that far you may as well do it properly.

    3. Re:Coolest Desire left to mankind? by John+Courtland · · Score: 1

      I hope he's done having children at that point. I can't imagine how ruined your genitalia would be after a 8000 mile or so ride.

      --
      Slashdot is proof that Sturgeon's Law applies to mankind.
    4. Re:Coolest Desire left to mankind? by MichaelSmith · · Score: 1

      I hope he's done having children at that point. I can't imagine how ruined your genitalia would be after a 8000 mile or so ride.

      I have cycled 9182 km in the last three years and I am yet to see any degredation in my genitalia.

  6. Finally, something for my Flying Car by Onetus · · Score: 5, Funny

    Excellent, now my mechanic will be available to get to my flying car (which is also coming "soon") no matter where it is.

    1. Re:Finally, something for my Flying Car by cervo · · Score: 1

      Heck even I remember seeing these things in the Weekly Reader magazine when I was in grammar school and that was during the 80's. The article seemed to be predicting in the next few years (I think around 10). And here we are almost 20 years later and the flying car is like Duke Forever.

  7. Finally, a real superhero emerges by Missing_dc · · Score: 1

    You hear a voice resounding off the local buildings

    " Here I come to save the day!! "

    (of course it would require modulating the sound produced by the rotors to act as a giant megaphone to be heard anywhere near this thing)

    --
    How amazed would you be to suddenly find that you just forgot what I wrote and you needed to reread my post.... again.
  8. I for one... by Anonymous Coward · · Score: 4, Funny

    ... welcome our hearing-impaired jetpack flying overlords.

    1. Re:I for one... by cailith1970 · · Score: 1

      Warning: Do not listen for incoming jetpack pilot with remaining good ear.

      Seriously though, I have thought about how you'd do this several times over the years, and you always ran into the problem of enough thrust in a small enough package to be truly portable. I don't think he's there yet, but it is a step in the right direction. I don't think a jet is necessarily the right approach, his internal combustion is still fine. Maybe an electric might work, if you can factor in the (not insignificant) weight of the batteries. Can't be that much heavier than a bigarse motor with fuel cells.

      --
      I intend to live forever, or die trying. - Groucho Marx
    2. Re:I for one... by Anonymous Coward · · Score: 0

      what?

  9. My news is far more important! by Channard · · Score: 5, Funny
    I have succesfully created working artificially intelligent android!

    Okay, so it's not so much an android as a small two foot tall robot.

    And by 'robot'.. I mean a cat wearing a cardboard box.

    ------------------ See! I can make my inventions sound grandiose by making things up, too!

    1. Re:My news is far more important! by roc97007 · · Score: 1

      Ok that's funny, but it got me to thinking. Why bother with artificial intelligence when we can just wire cat brains into machinery? I mean, cats are free, right? Seems like it'd save a lot of time and expense.

      I'm sure they'll figure out how to prevent sapient assault droids from climbing the drapes.

      --
      Oliver's law of assumed responsibility: If you're seen fixing it, you will be blamed for breaking it.
    2. Re:My news is far more important! by The+Grim+Reefer2 · · Score: 1

      Ok that's funny, but it got me to thinking. Why bother with artificial intelligence when we can just wire cat brains into machinery? I mean, cats are free, right? Seems like it'd save a lot of time and expense.

      How about a rat brain instead?

      http://dsc.discovery.com/news/briefs/20041018/brain.html

    3. Re:My news is far more important! by consonant · · Score: 1

      And not so much artificial as an actual living organism. And not so much intelligent as something that would claw your eyes out when possessed by the Demon Cat Master.

    4. Re:My news is far more important! by Hognoxious · · Score: 3, Funny

      And by 'robot'.. I mean a cat wearing a cardboard box.

      We kan haz pitchers, or DO NOT BELEEV!

      --
      Confucius say, "Find worm in apple - bad. Find half a worm - worse."
  10. Practical, yeah... by dimethylxanthine · · Score: 0

    I can see this featured in the next Weird Al video.

  11. Didn't the myth busters try to make one and failed by Joe+The+Dragon · · Score: 2, Insightful

    Didn't the myth busters try to make one and failed at it?

  12. Protection from Pedantry by Red+Flayer · · Score: 1

    "It is also not, to put it bluntly, a jet. 'If you're very pedantic,' Mr. Martin acknowledged..."translation: We've submitted this to Slashdot, and wish to head off the Legion of Pedantry and the Battalion of Righteous Verbiage before they cause the discussion to degenerate into useless babble that doesn't help us get VC funding.

    --
    "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
    1. Re:Protection from Pedantry by Red+Flayer · · Score: 1
      D'oh. Preview is my oft-ignored friend. There goes the humor. Should read:

      "It is also not, to put it bluntly, a jet. 'If you're very pedantic,' Mr. Martin acknowledged..."

      Translation: We've submitted this to Slashdot, and wish to head off the Legion of Pedantry and the Battalion of Righteous Verbiage before they cause the discussion to degenerate into useless babble that doesn't help us get VC funding.

      --
      "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
    2. Re:Protection from Pedantry by Beyond_GoodandEvil · · Score: 1

      "It is also not, to put it bluntly, a jet.
      Actually looks more like the old Cobra "Trouble Bubble" from the mid80's than a proper jet pack.

      --
      I laughed at the weak who considered themselves good because they lacked claws.
  13. I Read TFA ... And Lawled by strelitsa · · Score: 5, Funny

    In June 1997, seven weeks after the birth of his second child, Mr. Martin figured his prototype was now powerful enough to lift its first flier, so long as that person weighed less than 130 pounds. So he turned to his wife. "I said, 'Hey, Vanessa, what are you doing tonight?"

    Mrs. Martin agreed to be her husband's levitating guinea pig.

    ...

    She said she felt, in a way, that she had conquered it - "the taming of it, that's so exciting." It was, she said, "probably the best experience of my life."

    Doesn't say a lot about being married to Mr. Martin or Mr. Martin's prowess in the sack, does it?

    --
    No mod points, no meta-moderating/Firehose/all the other free work Slashdot wants me to do.
    1. Re:I Read TFA ... And Lawled by geekoid · · Score: 1

      It does say a lot for wanting Mr. Martin to sell these.

      --
      The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
    2. Re:I Read TFA ... And Lawled by Slacksoft · · Score: 5, Funny

      Never know, she could have joined the 3-feet high club with Mr. Martin ....

    3. Re:I Read TFA ... And Lawled by WK2 · · Score: 2, Funny

      The following would have been better:

      In June 1997, seven weeks after the birth of his second child, Mr. Martin figured his prototype was now powerful enough to lift its first flier, so long as that person weighed less than 13 pounds. So he turned to his wife. "I said, 'Hey, Vanessa, where's baby?"

      The now ex Mrs. Martin said, "No. I don't think so."

      --
      Write your own Choose Your Own Adventure. http://www.freegameengines.org/gamebook-engine/
    4. Re:I Read TFA ... And Lawled by Free+the+Cowards · · Score: 1

      Pilots' wives think that their husbands treat flying as a sort of substitute for sex.

      The big secret, what we really don't want our wives to know, is that sex is really just a substitute for flying.

      I don't think it says anything particularly bad about her husband.

      --
      If you mod me Overrated, you are admitting that you have no penis.
    5. Re:I Read TFA ... And Lawled by Anonymous Coward · · Score: 0

      I prefer..

      In June 1997, seven weeks after the birth of his second child, Mr. Martin figured his prototype was now powerful enough to lift its first flier, so long as that person weighed less than 13 pounds. So he turned to his wife. "I said, 'Hey, Vanessa, where's baby?"

      Then, coming around a curve, Mr. Martin jogged to the right to avoid some equipment on the ground, bringing the jetpack too close to an overhanging tree. The baby was sucked into the rotors with a brief but sickening sound, like a blender trying to make a margarita with twigs. Luckily, he had spare parts.

    6. Re:I Read TFA ... And Lawled by MichaelSmith · · Score: 4, Funny

      Never know, she could have joined the 3-feet high club with Mr. Martin ....

      What you mean one jetpack each? I am not sure they are designed for...in flight refueling.

    7. Re:I Read TFA ... And Lawled by Anonymous Coward · · Score: 0

      Best 12 seconds of her life?

  14. Pedantry by Anonymous Coward · · Score: 4, Funny

    "It is also not, to put it bluntly, a jet. 'If you're very pedantic,"' Mr. Martin acknowledged, a gasoline-powered piston engine runs the large rotors. Jet Skis, he pointed out, are not jets, and the atmospheric jet stream is not created by engines.

    Certainly one is permitted a bit of license in terminology. In fact, if you really get down to it, Jet Li is not actually a jet either.

    1. Re:Pedantry by shadwstalkr · · Score: 4, Funny

      The New York Jets, Joan Jett, Jet The Band, and Jet's Pizza are also not jets. Jet Blue and The Jetsons are under review. Jet Clampett is a misspelling, and Jethro Tull doesn't understand the question.

      Are we finished here?

    2. Re:Pedantry by Zwicky · · Score: 1

      Jet Li is not actually a jet either.

      [citation needed]

      --
      "Three eyes are better than one" -- Lieutenant Columbo
    3. Re:Pedantry by Anonymous Coward · · Score: 0

      I thought the Major
      was a lady
      suffer a Jet
      Jet!
      woo-oo-oo-oo

            Paul McCartney circa 1973

  15. Jet Packs & You by Manip · · Score: 4, Insightful

    The concept of a personal flying machine (e.g. Cars, Bikes, Jet Packs) is two fold at the moment.

    1) Energy / Power (inc. Storage & Delivery)
    2) Safety

    Now I'm going to assume for the sake of this post that we could solve the second one if it was viable to do anyway.

    The real kicker is really energy. We need a very rich energy source that is cheap, light, small in volume, and safe.

    We can often tick two or three of those boxes but no energy source comes remotely close to hitting all four. Hydrogen for example is light, small in volume, but there are questions over safety and cost.

    If we invented some kind of completely safe energy source that had the energy output approaching a nuclear reactor and weighted very little we could be in flying cars within a few years.

    But frankly such dreams are far off.

    1. Re:Jet Packs & You by geekoid · · Score: 1

      Nuclear powered electric rotors!

      "But frankly such dreams are far off."

      You don't say~

      --
      The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
    2. Re:Jet Packs & You by Sj0 · · Score: 1

      I'd say such dreams are actually behind us. We've reached the peak of our cheap portable energy. From here it all gets more expensive and more bulky.

      --
      It's been a long time.
    3. Re:Jet Packs & You by Sockatume · · Score: 3, Interesting

      Hydrogen's not really all that small in volume, actually. Joule-for-joule it takes up much more space in gasoline, even when you start getting into bulky cryogenic compressed storage. Chemical or physical storage is getting there, of course, but isn't a serious option yet, and you run into the problem of gravimetric energy density. You don't want to weigh down your vehicle with fuel.

      --
      No kidding!!! What do you say at this point?
    4. Re:Jet Packs & You by the_B0fh · · Score: 1

      How to pack energy up in small bundles that can be handled safely. Hmm... I know, I shall store energy as physical things, and allow you to convert back and forth using E=mc^2.

      Extracting the energy from any stored form is left as an exercise for the end user.

    5. Re:Jet Packs & You by lennier · · Score: 3, Insightful

      "Hydrogen for example is light, small in volume..."

      No, actually, that's exactly wrong. Being light by definition means it is NOT "small in volume". It takes a huge volume of H2 in room temperature gas form to store a similar amount of energy to a heavier molecule. The volume problem is why it's a pain to store unless you go to cryogenics, hydrides, or other complicated systems.

      --
      You are not a brain: http://books.google.com/books?id=2oV61CeDx-YC
    6. Re:Jet Packs & You by rcw-work · · Score: 2, Informative

      The concept of a personal flying machine (e.g. Cars, Bikes, Jet Packs) is two fold at the moment.

      1) Energy / Power (inc. Storage & Delivery)
      2) Safety

      Why, again, does this need to be something you carry on your back instead of something you step into?

      Gyrocopters can be made very small, they can land almost vertically (and in a controlled manner with the engine out), the ones with pre-rotators and collective controls can take off near vertically (the ones that can only do the former need only a few hundred feet, the ones that can do neither need less than 1000 feet), they'd be a lot quieter, reasonably fuel-efficient, and less dangerous than any incarnation if this thing, which would fall like a rock on engine failure. Some of them even qualify as ultralights which means that no pilot license is needed for them.

    7. Re:Jet Packs & You by Sibko · · Score: 4, Insightful

      Hydrogen for example is light, small in volume, but there are questions over safety and cost.

      Actually, Hydrogen is light, huge in volume, very safe, and inexpensive. There's a reason it was used to fly blimps, you know.

      And before someone goes around throwing the hindenburg in everyone's faces, keep in mind that it was painted with rocket fuel, and that more than half the people on board survived the crash. The same cannot be said for your average airplane.

      What gets me though, is that in the face of a personal flying machine that flies around in a video, and is capable of doing so for half an hour, you go on about how personal flying machines aren't possible. Flying cars are known as Helicopters, and your average person could likely afford a hot air balloon. Personal flying machines are everywhere - from cessna's to hang gliders. They're just not as ubiquitous as automobiles, nor as practical for getting around.

    8. Re:Jet Packs & You by Tweenk · · Score: 1

      With regard to point 2, the presented jetpack is interesting, becuase it's safer the lower you fly - directly opposite to airplanes and helicopters. It may actually have a niche market after all.

      --
      Those who would give up liberty to obtain working drivers, deserve neither liberty nor working drivers.
    9. Re:Jet Packs & You by Glonoinha · · Score: 1

      Maybe if we coupled the hydrogen with some carbon atoms, made chains that were eight carbons long with a bunch of hydrogens hanging off the carbons. Maybe throw in a bunch of three or four carbon chains with hydrogens hanging off them and mix it all up, come up with a liquid that has a very low boiling point, is easily vaporized or converted into a mist to increase its surface area, with a propensity to combine with the oxygen in the air in that form if ignited by spark (in a highly reactive manner giving off heat and explosive force, which we could use to power the vehicle.)

      Naw, that would never work.

      --
      Glonoinha the MebiByte Slayer
    10. Re:Jet Packs & You by hax0r_this · · Score: 1

      Hydrogen is never light and small in volume at the same time. At least all of the high density storage methods I've seen aren't light. It is, however, pretty safe for the most part.

    11. Re:Jet Packs & You by dudeinthedark · · Score: 1

      I think this calls for... FLUBBER!

    12. Re:Jet Packs & You by zacronos · · Score: 1

      Why, again, does this need to be something you carry on your back instead of something you step into?

      Well, it doesn't *need* to be, but it would generally be a easier to transport if it's small enough to go on your back rather than something which requires a pickup truck or car with a hitch and a trailer to move around in town.

      To turn the question around, why not have something you can carry on your back? A parafan (also known as a powered paraglider) can't take off or land vertically, but doesn't require a whole lot of horizontal space either. They're probably not as fuel efficient, but have the advantage of maintaining a fully-deployed parachute during flight -- it's probably the safest amateur flying machine out there in terms of "what if my engine dies while I'm flying?".

      They also make PPGs mounted on bikes and trikes, so the flying bicycle is already here. In once sense this is bigger and thus harder to transport, but on the other hand you can peddle around (or even use the fan for a power assist) to get around in town, so these don't need anything else for transport.

    13. Re:Jet Packs & You by MichaelSmith · · Score: 1

      Methane would do it fine.

    14. Re:Jet Packs & You by MichaelSmith · · Score: 1

      less dangerous than any incarnation if this thing, which would fall like a rock on engine failure.

      I assume you would give it a ballisic parachute, possiby automatic but it won't help you below 100 feet or so.

    15. Re:Jet Packs & You by Dantoo · · Score: 1

      Seriously a "jet-pack" enables you to do many things that can't be done as well by auto gyro.

      I can see a use for these in search and inspection roles. It currently claims to have 30 mins endurance. If so, I can imagine them being very useful for a low search in rough terrain, under a forest canopy, over gorges, rivers, and generally hard going. If you need to put down and check something more closely, you can do it instantly and then resume the search just as fast. No need to call in a ground team.

      Missing person from ski lodge? Strap on the pack and go take a quick look. Snow is the kind of obstacle that can be better traversed from 200 feet up. Cheaper to keep one of these things on standby than a helicopter.

      Its qualities make it ideal for pipeline inspection. Low and slow where needed, across all sorts of terrain. Power line inspection is also a possibility. Boundary riding? Mineral exploration?

      I am sure it would be far more useful with a semi-autonomous flight controller, fly by wire in effect. More stable, able to set for hover, automatic deployment of safety chute at system failure etc. These things could push the price up 5 times and it would still be a cheap alternative in many applications.

      This and whatever may spawn from it have a great future from what I can see.

    16. Re:Jet Packs & You by Anonymous Coward · · Score: 0

      The concept of a personal flying machine (e.g. Cars, Bikes, Jet Packs) is two fold at the moment.

      1) Energy / Power (inc. Storage & Delivery)
      2) Safety

      Now I'm going to assume for the sake of this post that we could solve the second one if it was viable to do anyway.

      The real kicker is really energy. We need a very rich energy source that is cheap, light, small in volume, and safe.

      We can often tick two or three of those boxes but no energy source comes remotely close to hitting all four. Hydrogen for example is light, small in volume, but there are questions over safety and cost.

      If we invented some kind of completely safe energy source that had the energy output approaching a nuclear reactor and weighted very little we could be in flying cars within a few years.

      But frankly such dreams are far off.

      Gasoline has more than enough power. The problem is efficiency isn't even close to practical. The old quote is a gallon of gasoline spread thinly and ignited perfectly would raise the Empire State Building a foot in the air. That's more than enough power to fly a 200lb man around all day. The reason for needing such a major power source is mechanical inefficiency. As soon as you change one source of power to another or involve friction you loose energy. Generally through heat. It's the reason Ion Drives are such a big deal. They aren't powerful they are the exact opposite they are simply really efficient. You get the most propulsion for the mass involved of anything we know. It's the turtle and the hare. With a jet engine you can hit Mach speeds in minutes but an Ion Engine can potentially achieve near light speed it'll just take many years.

    17. Re:Jet Packs & You by Sockatume · · Score: 1

      You jest, but actually the high energy density of hydrocarbons makes them a viable energy source for fuel cells. This makes them a great potential stepping-stone, coupling the efficiency, quietness, and NOxlessness of electric with the existing infrastructure and energy density of gasoline, meth eth prop and butane.

      --
      No kidding!!! What do you say at this point?
    18. Re:Jet Packs & You by z0idberg · · Score: 1

      As for point 1.
      I think a scramjet type engine will go a long way to solving the fuel storage issues. That way you just need to carry enough fuel to get up to scramjet operating speeds and then you are cooking with gas.

      Then you just have to solve the relatively minor issues of steering, stopping, landing and your face melting off when you start reaching double figure Machs.

      I don't see point 2 as being a major issue.

    19. Re:Jet Packs & You by wattrlz · · Score: 1

      A gallon of gasoline has something like, ten times as much hydrogen in it as a gallon of liquid hydrogen. Just throwing that out there.

    20. Re:Jet Packs & You by Cousin+Scuzzy · · Score: 1

      Did you watch the video? The device appears to be more useful as a tree trimmer than as a flying machine.

    21. Re:Jet Packs & You by Cor-cor · · Score: 1

      And before someone goes around throwing the hindenburg in everyone's faces, keep in mind that it was painted with rocket fuel, and that more than half the people on board survived the crash. The same cannot be said for your average airplane.

      Paint airplanes with rocket fuel... Brilliant!

  16. $100k? by giminy · · Score: 4, Interesting

    Consider the total cost of a private pilot's license is about $10k, and the cost of a used Cessna 172 can be had for about $50k in great condition (which, keep in mind, can carry four people, or 2-3 people with some gear, pretty comfortably), I think that the jetpack would have a hard time selling.

    I suppose that there could be some niche market for this sort of thing though...though even a well-equipped Harley costs significantly less than many cars still.

    --
    The Right Reverend K. Reid Wightman,
    1. Re:$100k? by geekoid · · Score: 3, Funny

      Are you kidding?
      First, I'd love to ahve one of these, assuming it worked as promised.

      Second,... ah crap, I don't know, I just want one.

      --
      The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
    2. Re:$100k? by avandesande · · Score: 4, Insightful

      Someobody that is going to buy this isn't to buy it in place of a cessna.... it's an expensive toy, albit a very expensive one.

      --
      love is just extroverted narcissism
    3. Re:$100k? by hellwig · · Score: 3, Insightful

      This should classify as an ultra-light, meaning there's no pilot's license necessary, and you aren't tied-down by most of the traditional FAA regulations. Second, try taking off or landing a Cessna in your driveway.

      If you want to talk impractical, look at the Segway. The thing costs over $5000 (USD), and for what, cause you're too lazy to walk somewhere, or too uncoordinated to ride a bicycle? Why not buy a moped for a hell of a lot cheaper?

      This will fall into the same niche market as the Segway. People with too much money and nothing better to spend it or their time on.

      --
      Eggs
      Milk
      Bread
      Cat Litter
      Soda
      ...
    4. Re:$100k? by chinakow · · Score: 3, Interesting

      Who are these mythical 4 people who fit in a 172? I guess if two of them are small children then yes, but no luggage! :-) A pilot and me in a 172 on a day that is over seventy degrees and the pilot starts thinking about how much fuel he can have and still get off the ground. Also that niche is called Genral Aviation or GA for short. You also didn't mention that a brand new 172 costs one hundred and twenty thousand dollars ($120,000). Did I mention that air conditioning adds another $20,000? I went and looked at light sport aircraft a couple weekends ago. None of those where under $100K and LSA is supposed to be the category that gets the general public interested in aviation again. Raise you hand if $100 is less than your yearly income. $100k has been the line for upper class for a long time and here in fly-over country it certainly still seems like a good mark. So the price of this jet pack seems rather reasonable to me. If it is truly under 255 pounds and carries less than 5 gallons of fuel it would also qualify as an ultralight and not need to be certified which would make it more approachable because the pilot would not need to be licensed as a pilot either. I just looked at your link, none of those under $50k planes list engine time. Don't forget to factor another $20k for the engine rebuild as well. Notice that the new planes are listed at ~$200k. Good luck with your 172. I will spend my imaginary money on a jet pack! :-)

    5. Re:$100k? by commodoresloat · · Score: 1

      Well, the price of a used Volkswagon is even cheaper; what's your point?

    6. Re:$100k? by SanguineV · · Score: 1

      It will be a great analogy once you can fit a Cessna 172 in your garage as well as your car and can take off from your back yard. Until then, while the jetpack is obviously much less practical for family holidays, it does offer the potential for personal and convenient transport with far less infrastructure invested in airports.

      I would have thought the benefits of jetpacks as personal transport are the goal. We already know how to fly from city to city, but with the congestion problems on the ground, being able to fly from block to block or even building to building could revolutionise urban planning and convenience.

      Disclaimers on the safety, cost, etc. this is all some way off for the average person you find driving a car to work... if you even want the average driver in control of a jet.

    7. Re:$100k? by GroeFaZ · · Score: 1

      I totally agree. Pricing would also explain why so few Saturn V rockets are used for recreational purposes. However, it fails to explain why rusty spoons (for carving your heart out) are equally absent from the market.

      --
      The grass is always greener on the other side of the light cone.
    8. Re:$100k? by rcw-work · · Score: 3, Informative

      Second, try taking off or landing a Cessna in your driveway.

      Unless your driveway is in the sticks, you'll only be able to take off and land this thing there once. After that, the neighbors will have taken out restraining orders preventing you from operating it near them.

    9. Re:$100k? by giminy · · Score: 2, Interesting

      Who are these mythical 4 people who fit in a 172? I guess if two of them are small children then yes, but no luggage! :-)

      Note that I said, "can carry four people, or 2-3 people with some gear" The jetpack can carry just one person with little to no gear.

      A pilot and me in a 172 on a day that is over seventy degrees and the pilot starts thinking about how much fuel he can have and still get off the ground.

      Interesting pilot. I used to fly with my housemate who belonged to an aero club. We took Cessna 150s and 152s out, which are a lot less powerful than the 172. He did say that I slowed his plane down a lot (I weighed 200 pounds then :_)), though it wasn't a big deal getting airborne or even that big a deal for pleasure flying, concerning fuel weight. We always topped off the tank before taking off...

      I just looked at your link, none of those under $50k planes list engine time.

      You should look again. Almost every plane lists engine time since major overhaul as well as total airframe time. Like this one, this one, this one. Only a small minority do not list time since overhaul...

      Anyway I don't think I would ever buy a plane, unless I was starting an aero club or plane cooperative. Aero clubs aren't too expensive (a lot less than buying and maintaining my own aircraft, anyway :)).

      Reid

      --
      The Right Reverend K. Reid Wightman,
    10. Re:$100k? by SoupIsGoodFood_42 · · Score: 1

      Yeah, because the ride in a Cessna and a ride on a jet pack are really the same thing. You might as well compare off-road motorbike racing to driving down the public road in a big sedan.

    11. Re:$100k? by chinakow · · Score: 1

      damnit, every time I run my mouth off. . .

      For the record I did look at more than one plane for less than 50k, looks like I just looked at the wrong ones.

      Doesn't the engine require overhaul at 2000 hours? One of those did only have 900 hours so I stand corrected about the needing overhaul implication.

      I just looked at the specs on the 152 and the 172 and I must say either my friends and I are much fatter then you and yours or your friend played a little looser with the rules. Aside from that, the CO-OP is a good idea because paying for maintenance out of many pockets is much better than paying from one. Especially considering the kind of money pit an airplane is.

    12. Re:$100k? by tehcyder · · Score: 1

      People with too much money and nothing better to spend it or their time on.

      There's only so many hookers and cocaine you can use at a time, you know.

      --
      To have a right to do a thing is not at all the same as to be right in doing it
    13. Re:$100k? by Anonymous Coward · · Score: 0

      Raise you hand if $100 is less than your yearly income

      *raises hand*

    14. Re:$100k? by Chapter80 · · Score: 1

      Raise you hand if $100 is less than your yearly income.

      Who doesn't make more than a hundred bucks?

    15. Re:$100k? by smellsofbikes · · Score: 1

      For the record, I got my private pilot license for about $4500. Granted, that was a few years ago before gas went through the roof, but I also didn't do a very good job of it and could've saved a lot more money if I'd done it right.

      If anyone reading this is thinking about it, here are some hints.

      1. Figure out how much you think it's going to cost, based on what the FBO you're working with says it's going to cost, then add 30%, and don't start until you have this sum saved up and know you won't need it. (Reason: running low on money means you don't fly as often, means you don't learn/retain as well, means you take a lot more lessons.)

      2. Once you start, schedule for 4 lessons a week. Weather means you'll probably only fly 3 of those. That's optimal: fly, take a day off, repeat. More than that is somewhat overwhelming, and much less than that, less than 2 times a week, and you won't be learning so much as relearning what you did last time and then learning a little bit of new stuff.

      3. Find a flight instructor who is a middle-aged airplane junkie, not a kid just out of school, because the middle-aged or older instructor will stick around, while the kid is just making time until an airline comes looking for employees. It really slows down your training if you have to go through several instructors because they keep getting Real Jobs and disappearing.

      4. Shop around before you start. Sign up for discovery flights at several local FBO's, find a place you like, you feel like you can trust to field good planes. It's worth paying somewhat more per hour to not have to deal with planes that have mechanical problems that mean you don't get your lessons because they're grounded.

      5. Get your medical done first. You'll waste a LOT of money if you start lessons and then get your medical before you solo... and find out that you have some weird blood disease you didn't know about and can't actually get a medical certificate.

      6. Buy a flight log book from Sporty's or Aviation Spruce before you do any of this, because every "discovery flight" you take when you're shopping around, checking out different FBO's, is loggable time, and it's usually cheap loggable time. If you're a quick learner, you can save maybe a couple hundred dollars by getting cheap time cut off that 40 hours you need before your final test.

      I'm assuming you'll be doing ground school on your own. Ask if the FBO's are okay with that: some won't let you. I did my own studying, learned what I needed from books I checked out from the library, and passed the FAA written test with flying colors.

      --
      Nostalgia's not what it used to be.
    16. Re:$100k? by ChrisA90278 · · Score: 1

      none of those under $50k planes list engine time. Don't forget to factor another $20k for the engine rebuild.

      The typical airplan owners is lucky to log 200 hours a year. Even if the engine is only 1,000 houors left before overhaul that amounts to more than 5 years of use.

      You are right about the 172. It's reallt a two person plane with a back seat. Put kids in the back and then you can take only a half load of fuel. So.... By a 150. If you can use the old tail drager version you can get them for under $25K

      Sport plan building is kind of a fun hobby. I was looking at several designs that used converted Volkswagen engines (The old air cooled ones from the "bug") these are relatively inexpensive and after conversion quite reliable with dual ignition systems cylinder head temperature and exaust gas temperature readouts and so on. Yes many people lack the skill to build and most lack the skill to fly but it's not hard to learn and you can spread the cost out to $100 a week or so. cancel you cable TV and cell phone. Put the money into flying.

  17. Excellent by Overly+Critical+Guy · · Score: 1

    These will be perfect for my sharks.

    --
    "Sufferin' succotash."
  18. Murderer by Doc+Ruby · · Score: 4, Funny

    My neighbors can't even handle driving SUVs, but the roads are full of them (and the hell they've made of driving among them).

    Turning these people into missiles with jetpacks is a great argument for prioritizing personal force field research.

    --

    --
    make install -not war

    1. Re:Murderer by geekoid · · Score: 3, Funny

      They will only be a problem for a little while. Mistake will weed them out very quickly.
      In the mean time, stay indoors.

      --
      The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
    2. Re:Murderer by SanityInAnarchy · · Score: 1

      Actually, it's a great argument for making these things even more dangerous, and letting natural selection take its course!

      --
      Don't thank God, thank a doctor!
    3. Re:Murderer by lilomar · · Score: 1

      My God! You're right!

      You know what's even more dangerous? Airplanes!

      Imagine if these things ever were allowed off the ground. People would be flying into houses all of the time. Time to work on that force field!

      </sarcasm>

      --
      The creator of this post (Jacob Smith) hereby releases it, and all of his other posts, into the public domain.
    4. Re:Murderer by HiVizDiver · · Score: 1

      The good news is, unlike SUV's where horrible driving skills are rewarded by walking away from an accident unscathed whilst you've maimed the person in the normal-sized vehicle, the operator of this thing will likely get pureed in an accident, allowing natural selection to prove itself more than a theory.

    5. Re:Murderer by grahamd0 · · Score: 1

      Turning these people into missiles with jetpacks is a great argument for prioritizing personal force field research.

      You need a reason to prioritize personal force field research other than personal force fields?!

    6. Re:Murderer by Doc+Ruby · · Score: 1

      If airplanes were as available as these jet packs would be, in expense and licensing, then I'd be saying exactly what you're saying. If I survived long enough to say it.

      --

      --
      make install -not war

    7. Re:Murderer by lilomar · · Score: 1

      How is this different than when airplanes were first available?

      Don't worry, I'm sure it will be regulated soon enough.

      --
      The creator of this post (Jacob Smith) hereby releases it, and all of his other posts, into the public domain.
    8. Re:Murderer by Anonymous Coward · · Score: 0

      natural selection

      sacrilege!

  19. There'll Be A Slight Delay With Production Models by strelitsa · · Score: 0, Offtopic

    They're still trying to nail down porting Duke Nukem Forever into the console-mounted Nintendo DS.

    --
    No mod points, no meta-moderating/Firehose/all the other free work Slashdot wants me to do.
  20. reckless and brave! by Eto_Demerzel79 · · Score: 1

    no, I'm not talking about the test pilot but the guy who had the guts to ask her...

    In June 1997, seven weeks after the birth of his second child, Mr. Martin figured his prototype was now powerful enough to lift its first flier, so long as that person weighed less than 130 pounds. So he turned to his wife. "I said, Hey, Vanessa, what are you doing tonight? "

    but seriously that's quite a feat to do with an ICE, especially if you take into consideration that it needs to be balanced.

    As for me personally, I think I'll hold off until they figure out how to fit a microturbine into a school-sized backpack.

  21. Jetpack?!? by Locke2005 · · Score: 2, Informative

    How high off the ground does a vehicle need to get before it is no longer considered a hovercraft? I don't think this vehicle has ever reached that altitude. "If you can fly it as 3 feet, you can fly it at 3000 feet" is bullshit, if I understand something called "ground effect" correctly.

    --
    I've abandoned my search for truth; now I'm just looking for some useful delusions.
    1. Re:Jetpack?!? by compro01 · · Score: 1

      Unless I'm mistaken, ground effect would not apply to lift via vectored thrust, as this thingy uses, only to aerodynamic lift via wings. It's essentially the same principle a VTOL jet uses, only on a different scale.

      --
      upon the advice of my lawyer, i have no sig at this time
    2. Re:Jetpack?!? by cervo · · Score: 3, Interesting

      From TFA: "Only 12 people have flown the jetpack, and no one has gained more than three hours of experience in the air. Mr. Martin plans to take it up to 500 feet within six months. This time, he said with a smile, he will be the first."

      In the article it said that the height was limited to allow people to practice at lower altitude. And I think I recall the limit being at 6 feet so far. This statement appears to be about learning to control it at 3 feet before trying to take it 3000 or in the case of the test 500 feet.

      There's a good chance soon we'll have a more sensational article about a 500 ft flight soon. Hopefully it won't be part of an obituary.

    3. Re:Jetpack?!? by Guysmiley777 · · Score: 3, Insightful

      Depends entirely on how much excess power it has. If he's hovering at 6' off the ground at 75% throttle, it's a pretty good guess he'll be able to go much, much higher. If he's at 90% throttle at 6', I would seriously doubt 3,000' would be possible.

      --
      Coding with assembly is like playing with Legos. Coding an application in assembly is like building a car with Legos.
    4. Re:Jetpack?!? by Anonymous Coward · · Score: 0

      you dont. ground effect is only for lifting bodies. this isnt really one. the rotor discs are too small and enclosed.

    5. Re:Jetpack?!? by Pariah · · Score: 1

      Typically, you get extra lift from ground effect when your wings are within about a wingspan of the ground. (Thus, larger planes can get ground effect while they're higher up.)

      This thing uses very short rotary blades, with the thrust being directed by a cowling. Since the machine itself is about six feet tall, I doubt if it's getting any ground effect even when it's ON the ground.

    6. Re:Jetpack?!? by IdeaMan · · Score: 2, Informative

      Ground effect applies to airplanes, helicopters and of course hovercraft.
      I would expect the effect would be much less on this craft given that it has much less surface area than a hovercraft or helicopter.
      So yeah, get at least 7 times your width up before you claim free flight (which earlier poster said there are videos of).

      --
      They ARE out to get you simply because They are in it for themselves and they don't care about you.
    7. Re:Jetpack?!? by MichaelSmith · · Score: 2, Interesting

      Ground effect applies to airplanes, helicopters and of course hovercraft.

      Ands rockets. Lunar module pilots had to either cut their power or throttle right down to land on the moon. Ground effect was significant over the last couple of metres.

    8. Re:Jetpack?!? by aXis100 · · Score: 1

      The ground effect on aerofoils may be a little differnt.

      What about the reaction force of the air against the ground? Does that translate into higher pressure in the "jet" and thus more thrust?

    9. Re:Jetpack?!? by Anonymous Coward · · Score: 0

      They usually just cut the descent engine when the contact light came on and dropped to the surface.

    10. Re:Jetpack?!? by jandrese · · Score: 1

      I think you have to get above the ground effect to not be considered a hovercraft.

      --

      I read the internet for the articles.
    11. Re:Jetpack?!? by AB3A · · Score: 1

      ...if I understand something called "ground effect" correctly.

      It's a good thing you hedged your statement because I have doubts that you understand ground effect.

      Ground effect is caused by the disruption of airflow from wing-tip vortices. For airplanes, the disruption of this source of drag from the wing tips results in extra lift as the airplane approaches the ground to land.

      For Helicopters and Gyro-copters the proximity of the main rotor to ground also disrupts the air curling over the edge of the rotors. They too get a slight boost of lift.

      However, this Jet-Pack uses a ducted fan. The fans duct contains the wing tip (fan blade) vortices, so there is no ground effect. And don't get me started about the exhausted air --that doesn't result in any extra thrust for a rocket, nor would it result in any extra thrust for a ducted fan.

      --
      Nearly fifty percent of all graduates come from the bottom half of the class!
    12. Re:Jetpack?!? by susano_otter · · Score: 1

      I'm pretty sure ground effect is an aerodynamic phenomenon that requires a substantial atmosphere... which the moon does not have.

      Can you cite a source for your claim that ground effect was a factor in landing on the Moon?

      --

      Any sufficiently well-organized community is indistinguishable from Government.

    13. Re:Jetpack?!? by MichaelSmith · · Score: 1

      The Apollo Lunar Surface Journal contains many references to the affect of gas pressure inside the descent engine bell. Below two metres altitude the engine was supposed to be shut down because the excess pressure close to the ground might cause the bell to deform.

  22. Coolest desire? by atari2600 · · Score: 0

    To get a (hot) chick?

    1. Re:Coolest desire? by MichaelSmith · · Score: 1

      To get a (hot) chick?

      But how to you take her home?

  23. Re:Didn't the myth busters try to make one and fai by hellwig · · Score: 4, Insightful

    Yeah, but they worked in TV time, which meant they had a week before the producer got bored and told them to do something else. This guy has been working 27 years, so I wouldn't doubt he put a little more effort in over that time.

    Besides, the mythbusters fail to reproduce a lot of things, even when they know before hand it's not really a myth but actual fact.

    --
    Eggs
    Milk
    Bread
    Cat Litter
    Soda
    ...
  24. Gasoline?!? by tb()ne · · Score: 4, Funny

    No, thanks. I'm waiting for a hybrid or electric jet pack before I buy. One has to be practical about buying a jet pack, given today's gas prices.

    1. Re:Gasoline?!? by dbcad7 · · Score: 1

      I'm wondering about a combination of helium pack & electric fans.. might not get the speed but would still be cool.. have to wonder how big the packs would have to be to lift a 180 person though... if it gets to be "car size".. well then, may as well shoot for the flying car instead.

      --
      waiting for ad.doubleclick.net
    2. Re:Gasoline?!? by DeadDecoy · · Score: 1

      Ya, and what happens if you run out? Does that mean you have to get out and push?
      :)

  25. Re:Didn't the myth busters try to make one and fai by mjensen · · Score: 2, Informative

    Yes. Couldn't lift itself off the ground, let along a 180lb pilot.

    That said, they also added a lot of structural integrity (mass) before the first flight, that they possibly could have done after first flight to check the limits.

  26. Didn't Mythbusters debunk this? by Duncan+Blackthorne · · Score: 0, Troll

    This thing looks almost exactly like something that Mythbusters built from purchased plans. They're far from being idiots, and they couldn't get the thing off the ground.

    1. Re:Didn't Mythbusters debunk this? by lilomar · · Score: 1

      You forgot one factor in your argument: Time spent working on project.

      27 Years VS About a week.

      You do the math.

      --
      The creator of this post (Jacob Smith) hereby releases it, and all of his other posts, into the public domain.
    2. Re:Didn't Mythbusters debunk this? by Duncan+Blackthorne · · Score: 0, Troll
      My math is fine.

      We've been flying for, what, about a hundred years now? And this fellow has been working on this for roughly a quarter of that time and it still doesn't work?

  27. I think you mean... by Samah · · Score: 3, Funny

    A "Jitpeck"?

    --
    Homonyms are fun!
    You're driving your car, but they're riding their bikes there.
    1. Re:I think you mean... by MichaelSmith · · Score: 1

      Jtpck actually

  28. Pressure? by SanityInAnarchy · · Score: 0

    âoeIf you can fly it at 3 feet, you can fly it at 3,000,â/quote.

    Except that you're going to have different air pressure, different wind, different temperature...

    Not saying it's impossible, but I really hope they don't take it directly from 6 feet up to 6000 and wonder what went wrong.

    --
    Don't thank God, thank a doctor!
  29. Altitude Test? by Anonymous Coward · · Score: 0

    I read TFA, and they haven't taken this thing more than six feet off the ground. I'd be happy with 50, so at least I could clear most of the trees on my way to and from work...

  30. There's also this to consider... by deft · · Score: 1

    You know what else you didnt think of? Considering the cost of a honda civic, and gas mileage, not to mention it has room for 4 comfortably, a great track record of fuel efficiency and reliability, we are forgetting the realization that you are seemingly pretty damn boring as a human.

    --

    There's nothing Intelligent about Intelligent Design.
    1. Re:There's also this to consider... by Anonymous Coward · · Score: 0

      hey wow, the only thing missing from that post was the NECROTIC DOG PENIS HUR HURRRRR

  31. Re: Not a Cessna replacement. by IdeaMan · · Score: 1

    No, you misunderstood: You use this thing to get to and from your Cessna. The question is, can your Cessna hold an additional 250 lbs that bulky?

    --
    They ARE out to get you simply because They are in it for themselves and they don't care about you.
  32. Truer words were never spoken by GroeFaZ · · Score: 1

    That's a little anticlimatic,

    That sentence of the last paragraph sums it up nicely. Technical detail was mostly absent, however, we are informed directly from the horse's mouth that "it simply flies". Thanks for clearing that one up. Not even a video for the visually fixated. Is there no better article on this?

    --
    The grass is always greener on the other side of the light cone.
  33. How about by hurfy · · Score: 1

    just calling it a microcopter or something and be done with it. It seems to be neither jet nor a pack in any sense of the word(s) :(
    It does have landing gear and props pointed up...we used to call those things helicopters....

    I suppose the real question is how do you license it/you for use ? I didn't see anything about how one would actually use it other than a toy in your own yard. Oh well 30 minutes flight time still isn't worth dragging it out to get there unless it was straight up anyway.

  34. That's no jetpack... by elynnia · · Score: 3, Informative
    ...that's a a ducted fan. As fancy as they are, making a personal flying device out of one was just a matter of improving the power-to-weight ratio.

    Although, having read the article, that may be much more simple than an actual jet-engined jetpack for the time being.

    -Aly.

    1. Re:That's no jetpack... by bencoder · · Score: 2, Informative

      Personal flying machines using ducted fan's were about back in the 50s as military projects, but scrapped because they were ultimately too impractical as combat vehicles :( imagine what the tech might have been like today if they had commercialised the projects :(

      http://en.wikipedia.org/wiki/VZ-1_Pawnee

    2. Re:That's no jetpack... by gregbot9000 · · Score: 1

      I've toyed with almost lighter than air vehicle designs for a while now as a mental experiment, and I can say that this guys device would be a lot better if he used a rather cheap helium balloon to stabilize his device and alleviate much of the lift needed by the engines. It would also help safety in slowing his rate of free fall. It could also reduce his costs which are kind of stupid high right now.

      Your average 53' trailer has about 3800 cubic ft. which is about 239 pounds of lift in helium, so a balloon at that size(it wouldn't be a rectangle though) would be able to easily lift a average person and some steering equipment. My goal is to have it be heavier than air and the extra lift provided by equipment very similar to what this guy built, so that assent and descent are controlled by propellers allowing for hovering. Though I doubt I'll ever have enough time to make it, and an ultra light would probably be easier.

  35. MythBusters by Citizen+of+Earth · · Score: 2, Informative

    Looks like he succeeded where the MythBusters failed. The device looks pretty much identical to the one they built.

    1. Re:MythBusters by dlapine · · Score: 1

      Except that they limited themselves to a 60HP engine (from the article) whereas this unit uses a 200hP engine and produces 600LBs of thrust. I'd bet they would have got off the ground if they went with the bigger engine.

      As I remember it, they were following a kit. Perhaps they'll revisit it.

      --
      The Internet has no garbage collection
  36. I wonder by Anonymous Coward · · Score: 0

    How long will it be before someone creates a mod for normal helicopters, that allows the pilot to be strapped to the front, with external controls?
    That's really what this is.

  37. The problem is... by rsmith · · Score: 1

    If the engine dies, so do you.

    --
    Never ascribe to malice that which is adequately explained by incompetence.
  38. Nope, there's a backup by localroger · · Score: 3, Informative

    The existing device includes a ballistic recovery system, basically an explosive-launched parachute that you deploy when something goes wrong. The main trick with that is to be flying high enough for the parachute to deploy and float you down. It's a common thing in ultralight aircraft and probably accounts for a lot of the cost. Most ultralight fatalities occur because the failure occurred too low for the BRD to deply, or it fouled in a propeller or something.

    --
    Brackets contain world's first nanosig, highly magnified:[.]
    1. Re:Nope, there's a backup by MichaelSmith · · Score: 1

      The existing device includes a ballistic recovery system, basically an explosive-launched parachute that you deploy when something goes wrong. The main trick with that is to be flying high enough for the parachute to deploy and float you down. It's a common thing in ultralight aircraft and probably accounts for a lot of the cost. Most ultralight fatalities occur because the failure occurred too low for the BRD to deply, or it fouled in a propeller or something.

      Thats why I think he should give up on the jetpack idea. He should attach the fans to a little cabin like on a sailplane, then outfit it with airbags inside and outside. That will help, but not totally fix the low altitude failure problem.

    2. Re:Nope, there's a backup by Anonymous Coward · · Score: 0

      Is an explosive-launched parachute effective at six feet of altitude?

  39. Practical Flying Machine Available by happymark · · Score: 1
  40. Failure modes? by fahrbot-bot · · Score: 0, Redundant

    I've said it before that the main problem with these devices is that there is no graceful failure mode - unless you consider "spudder, spudder, AHHHHHHHH, splat" acceptable.

    --
    It must have been something you assimilated. . . .
    1. Re:Failure modes? by bencoder · · Score: 1

      Someone didn't rtfa/wtfv, but this is /. It has ballistic parachutes in case of a failure.. I'd say parachutes are fairly graceful :)

    2. Re:Failure modes? by fahrbot-bot · · Score: 1
      I'd say parachutes are fairly graceful.

      Above a certain altitude, sure. Otherwise, I'm betting on some sort of fall / crush injury - ouch!

      --
      It must have been something you assimilated. . . .
  41. 6 Ft? by Powerbear · · Score: 1

    The highest the inventor has ever flown is 6ft and he ruined it demoing for the reporter by sucking in tree branches..doesn't instill confidence.

    With 600lb thrust and a 450lb vehicle and operator weight, the craft only has 3.2m/s2 of vertical acceleration.

    If you're 14.4m (50ft) off the ground and decending in excess of 9.6m/s (21mph) you're not going to decelerate to zero before hitting.

  42. Cold fusion and AI? by Sybert42 · · Score: 0

    Strange priorities. AI changes everything, while cold fusion just removes temperature requirements from a reaction.

  43. Dopey? by Anonymatt · · Score: 1

    Yes, but say you've just played a sold-out stadium show and need to make an impressive getaway...

    1. Re:Dopey? by Zwicky · · Score: 1

      Wouldn't happen. It would be too Dangerous.

      --
      "Three eyes are better than one" -- Lieutenant Columbo
  44. Comment removed by account_deleted · · Score: 3, Interesting

    Comment removed based on user account deletion

  45. Re:Jet Packs & You - Legal by Haoie · · Score: 1

    Not just that, you need a whole new set of rules/regulations and what not for anything that provides personal flight.

    Flying cars need traffic laws too.

    --
    If each mistake being made is a new one, then progress is being made.
  46. not a good idea by Anonymous Coward · · Score: 1, Funny

    Say you have your catbrain powered big industrial mofo running smoothly, stamping out your expensive widgets. Cleaning crew comes in WITH vacuum cleaners WITH long cords being dragged around. Now guess what happens to your widget assembly line?

    1. Re:not a good idea by roc97007 · · Score: 1

      It chases the cleaning crew?

      Wow...

      Why hasn't someone made a movie about this??

      --
      Oliver's law of assumed responsibility: If you're seen fixing it, you will be blamed for breaking it.
    2. Re:not a good idea by thepotoo · · Score: 1
      Not a problem. With sufficient brainwashing and hardware controls/overrides (or perhaps even in a software interpretation layer) the catbot wouldn't even think about getting out of line. There are two big problems here, though:

      1) The technology is not yet ready to interpret signals from neurons in the brain. MRIs are close, but we basically need to be able to receive and decode thousands of signals per second and do it on a neuron by neuron basis. My home computer is probably fast enough to receive these signals, but we need some sort of yet-to-be-developed biochemical technique to gather them and even then we have no fucking clue what most of them do. See the work being done right now on Roadrunner with human vision systems, that has the potential to be groundbreaking here.

      2) Cats are fucking stupid. Why not use a more intelligent animal? You might as well just use a VI to replace most of the stuff a cat could be taught to do; it'd be easier. Perhaps this idea would be viable with a human brain, but there are "moral issues" (whatever that means) involved with this idea.

      Disclaimer IANAAIResearcher (who is, honestly?)

      --
      Obligatory Soundbite Catchphrase
  47. Hold Out by Anonymous Coward · · Score: 0

    I'll hold out for the Infiltrator Mk. II

  48. Personal helicopter easier? by TheSync · · Score: 1

    Why not just go for the strap-on helicopter instead of bothering with the ducted fans?

  49. Re:Didn't the myth busters try to make one and fai by reverseengineer · · Score: 4, Interesting

    If I remember the episode correctly, the point of that particular myth wasn't so much whether they could build a working "jetpack," but specifically, if they could do so using some instructions they found on the internet which claimed a person could successfully do so with inexpensive, commonplace parts. What they found was that the instructions were too vague to serve as anything more than guidelines, and even after going over budget to get better quality parts, their machine still had an unacceptable thrust-to-weight ratio and so could not fly with a human passenger.

    While they "busted" the feasibility of that particular set of plans, they didn't really attempt to rule out a jetpack altogether. With the resources for proper parts, and the time for proper testing, it's undoubtedly possible to build a working jetpack/rocketbelt/ducted fan harness thing. The issues with personal flight systems have not so much centered around possibility as practicality.

    --
    "FDA staff reviewers expressed concern about the number of patients who were left out of the study because they died."
  50. Re: Not a Cessna replacement. by giminy · · Score: 1

    No, you misunderstood: You use this thing to get to and from your Cessna. The question is, can your Cessna hold an additional 250 lbs that bulky?

    In that case, I'll take two!

    Yeah, I think a 172 could carry 250 pounds okay, though it would be noticeably slower. I have to wonder: if you're going to fly your jetpack to the airport, what's the point of having a short-range, slow aircraft? :).

    I guess it's kind of like that car that turns into a boat. It's all for the girlfriends.

    --
    The Right Reverend K. Reid Wightman,
  51. You will know when it is feasible... by Anonymous Coward · · Score: 0

    Because the militaries of the world will be putting in their orders to whoever is selling. Not every soldier will have one mind you, but every soldier doesn't get an Apache, M1 Tank or a Humvee either. So until I hear about the defense industry selling these, I will write them off as impractical and too expensive.

  52. it's not that hard.... by Anonymous Coward · · Score: 0

    ...as seen in the Simpsons.... simply strap two 1 gallon jugs of milk, mix with Mentos, and voila!

  53. His mistake. by Anonymous Coward · · Score: 0

    Not building one out of a Delorean!

  54. MC Chris quote by crazycracker · · Score: 1

    My backpack's got jets. I'm Boba the Fett. I bounty hunt for Jabba Hutt to finance my 'Vette. I chill in deep space, a mask is over my face.

  55. I like the idea by Anonymous Coward · · Score: 0

    I think think of numerous minorities in my city who could benefit from the use of a JetPack. For example, anyone who can't reverse park, merge lanes etc, is given a Jetpack. Let's keep them off our roads. The best benefit comes from their 'accidents' won't affect 'our' road toll.

  56. Oh I see... by Stan+Vassilev · · Score: 1

    Both "practical" and "jetpack" may need quotation marks, however

    So essentially this article should be titled: "Practical" "Jetpack" Available "Soon".

    But it costs $100k, so I guess it's not really "available" to most normal people either. So it becomes: "Practical" "Jetpack" "Available" "Soon".

    That's the kind of stuff I come here to read :)!

  57. Lawn Dart Effect? by tomhath · · Score: 1
    "The weight of the engines and body of the flier sits lower than the rotors to create a pendulum effect that discourages the contraption from tipping upside down and creating what might be called the lawn dart effect."

    Yea, you sure wouldn't want to try inverted flight with a 250lb jet pack and 600lbs of down thrust.

  58. Jetpack? by chunkyasparagus · · Score: 1

    Screw this - I'm waiting for the first ROCKET pack!

  59. Re:Didn't the myth busters try to make one and fai by MichaelSmith · · Score: 1

    If this guy forgot about the jetpack requirement and built a little ducted fan powered aircraft he could actually be on to something.

    I hope it has a ballistic parachute though.

  60. Are they using Valve Time? by Anonymous Coward · · Score: 0

    This article doesn't really make it clear what time system they're using to specify "soon". Could it possibly be Valve Time (http://developer.valvesoftware.com/wiki/Valve_Time)? In that case, you guys will have to wait until Duke Nukem Forever goes gold.

  61. Sold Separately by Kaptain+Kruton · · Score: 2, Funny

    Are the 3 people moving him around the field in the video included in the $100K price tag, or are they sold separately?

  62. Not shark by TheLink · · Score: 2, Funny

    Flying Kiwi with lasers.

    He's from NZ after all.

    Anyway it doesn't look very practical at all - the two guys hardly ever let go of the thing.

    --
    1. Re:Not shark by Usquebaugh · · Score: 1

      They made a kiwi fly! Impressive.

  63. Trees! by Kensai7 · · Score: 1

    I loved the part when "the Beast" sucked those tree brunches. I don't know if it will ever be practical as a jet pack, but as a vertical lawnmower has possibilities... hehe.

    --
    "Sum Ergo Cogito"
  64. Soon to be put to criminal use by Saberwind · · Score: 1

    It occurs to me that a jetpack would make a convenient escape vehicle after robbing a bank, since police cars would soon lose you. The only problem is that you'd need some means of securing the loot, and there would be a limit to how much you could carry. Oh, and too much load might through you off balance... Presumably, future jetpacks will overcome these limitations.

  65. I don't want that design. I want THIS one. by Anonymous Coward · · Score: 0

    http://www.jet-man.com

  66. wrong use of quotes by GuNgA-DiN · · Score: 1

    instead of quoting the word "Soon" they should have quoted the word "Practical"

    i don't know about you... but, I don't happen to have $100,000 laying around.

    "practical" in my mind is something in the $10,000 - $20,000 range.

    1. Re:wrong use of quotes by Tim+C · · Score: 1

      The word you're thinking of is "affordable".

    2. Re:wrong use of quotes by thedistrict · · Score: 1

      But "affordable" wasn't in the title of the article, whereas practical was. Plus something that's not widely affordable can hardly be a practical solution can it?

  67. Steering and stability system optional? by Anonymous Coward · · Score: 0

    So the jetpack costs $100. That's a great price for a "jet" pack that flies one foot off the ground at about 2 miles an hour. Wow! I wonder how much the optional steering and stability system, consisting of three guys in black polos, kahkis, and ear protection costs? I wonder what the range is? In the video is just makes it about, what, 30 feet? Is there an in-flight movie? Built in DVD player?

  68. A brilliant and inventive suggestion... by unikussituation · · Score: 1

    ...with just two tiny drawbacks: A) we don't have any jet-powered rocket pants, and B) there's no such thing as jet-powered rocket pants outside the fictional serial "Robbie Rocketpants".

    --
    > Better dead than Smeg!
  69. Ob: Bob. by Anonymous Coward · · Score: 0
  70. Oh, the humanity by Hognoxious · · Score: 1

    Hydrogen's not really all that small in volume, actually. Joule-for-joule it takes up much more space in gasoline even when you start getting into bulky cryogenic compressed storage.

    Why bother? Just store it at ambient temperature and pressure in some kind of big bag. In fact, hydrogen's less dense than air so maybe you could get lift from the bouyancy; it's a win-win. I'm surprised that's never been tried before.

    --
    Confucius say, "Find worm in apple - bad. Find half a worm - worse."
    1. Re:Oh, the humanity by kRITek · · Score: 1

      Hey, it worked for the Hindenburg.

    2. Re:Oh, the humanity by Hognoxious · · Score: 1

      For suitably small values of "worked".

      --
      Confucius say, "Find worm in apple - bad. Find half a worm - worse."
  71. Chuck Norris you do not need to be by Anonymous Coward · · Score: 0

    to use one as he did in Walker Texas Ranger.

  72. Not necessarily by Viol8 · · Score: 2, Informative

    The old style peroxide jetpacks don't require fly by wire control because just like this one they have the centre of gravity BELOW the exhausts so the pilot is effectively dangling down beneath. All that would happen if he let go of the controls is that it would probably weave around a bit at random but its unlikely to go upside down or completely out of control.

  73. Jet Pack ? by Anonymous Coward · · Score: 0

    Why not paint it jet black so even "If you're very pedantic" it will be a jet pack. But I think, since it runs on fans, "fanny pack" would be a better term.

  74. Waaagh! by that_xmas · · Score: 1

    Jet packs...check. Now all I need is a few chainswords and plasma pistols and I can build my assault squad.

  75. done already? by hsingh00- · · Score: 1

    Hasn't this guy already done it? www.jet-man.com

  76. Re:Didn't the myth busters try to make one and fai by jandrese · · Score: 1

    What's impressive is that they built something that was pretty close to working. They needed bigger fans and most likely a more powerful motor, but it was generating lift. Of course the real problem with a jetpack like this control. The plans they downloaded from the internet almost certainly neglected this, and had it by some miracle actually worked, it would have still been a deathtrap for anything more than a tethered hover.

    --

    I read the internet for the articles.
  77. She is still with him by SmallFurryCreature · · Score: 1

    She is still with him, a guy who for decades now has been pooring every penny he earned into a boy dream. No woman would put with that kind of adolescent behavior unless the sex is very good indeed.

    --

    MMO Quests are like orgasms:

    You may solo them, I prefer them in a group.

  78. Flying Segway. by Anonymous Coward · · Score: 0

    They're going to design cities around them!

  79. Then just buy a powered paraglider by rsmith · · Score: 1

    Then why not go for a powered paraglider? In case of engine failure it has a decent glide ratio.

    It is also much more efficient. A paraglider can fly with a 20 HP engine, instead of 200!

    You can get a new powered paraglider for around US$ 8000 instead of US$100K.

    --
    Never ascribe to malice that which is adequately explained by incompetence.
  80. Jets skis not jets: since when? by Anonymous Coward · · Score: 0

    Jet skis operate on a Jet of water being expelled from a nozzel powered by an impeller.

    I'd say they are jet propelled. Don't believe me, I'll quote you one of my Aerospace Engineering Texts.

    PS i'm an aerospace engineer.

    However, if this 'jet-pack' expells air through a nozzel (didn't check out the related link) then i'd say its a jet-pack. Its jet-propelled.