Slashdot Mirror


Whirling Twirling Propeller Trike

hankmt writes "A student at MIT has built a tricycle that applies force to a giant rear fan, instead of directly to the wheels. The effect...well, it's best to look for yourself, but it would be pretty useful on the post-apocalyptic roads of the Australian Outback. The blades of the trike even have built in LED lights which display colored patterns...and also warn pedestrians of their impending deaths."

21 of 136 comments (clear)

  1. Crazy by grub · · Score: 4, Funny


    Those crazy MIT guys are lucky that Massachusetts just made health insurance mandatory!

    --
    Trolling is a art,
  2. First prize for impracticality by trolltalk.com · · Score: 2, Funny

    From the looks of it after watching the vide, its terrible at transforming pedal energy into forward motion, and I'd really hate to see what would happen in any sort of wind. At least a "real bike" you can get off and walk. Add bird strikes to the blades, the excess width, etc., and you've got a real problem.

    Unless,of course, you're Wiley Coyote, and ride it off a cliff - you could autogyro down, I guess.

    1. Re:First prize for impracticality by Welsh+Dwarf · · Score: 4, Informative

      The for the record, it's 'kiki's delivery service' that has the bicycle!

      --
      Ask 8 slackers a question, get 10 awnsers (a citation, but I can't remember from who)
    2. Re:First prize for impracticality by timeOday · · Score: 4, Funny

      Oh well, millions of people per year spend good money on devices that do nothing *but* waste energy, such as elliptical machines, treadmills, and exercycles. And you can't even hack people to pieces with those.

    3. Re:First prize for impracticality by trolltalk.com · · Score: 4, Funny

      But in this case, he'd autogyro down, with that big sh*t-eating grin on his face, holding up a sign saying "PHEW!" and just as he gets to ground level - BAM! a truck driven by the RoadRunner runs into him and creams him.

    4. Re:First prize for impracticality by hszp · · Score: 2, Interesting

      Disclaimer: I would not want to pedal that sh!t uphill under any circumstances.

      But it's simply great. How many of you would have thought such speed was possible in such an unefficient way? Sure: he could be three times as fast with an everyday ( "run-off-the-mill"? ) bike, but that's only better by a factor of 3.

      Add a big helium-filled balloon to the thing and next thing you see he's flying (don't try this at home kids, you're not coming down the way you think you would).
      Or build something similar for a glider plane (for braking, of course =))

      Under certain circumstances, a personal carrier like this can prove to be the most efficient way of transportation. Where drag-force exceeds gravitational force by some constant. So: moon-buggy - no, underwater-vehicle - maybe, somethingcompletelydifferent - yes.

      Catch my drift?

    5. Re:First prize for impracticality by tylernt · · Score: 3, Informative

      Gyroplanes (or gyrocopters, if you wish) auto-rotate all the time and can still do a zero-roll landing without a collective. The rotor speed is controlled by the angle of attack to the relative wind so you come in at speed and then flare at the last moment... not that that would really help a guy going down in this trike though, as he would have no control surfaces.

      --
      DRM 'manages access' in the same way that a prison 'manages freedom'
  3. Re:Dumbass Rolled Up Pant Leg by Dan+East · · Score: 4, Funny

    You know what also is funny? The way he rolls up one of his pant legs to be 'in style.' Real original, is he an MIT gangsta?

    Actually, the bike pulls to the right. So by rolling up his right pant leg that side creates less drag, which helps trim the bike back to the left.

    Dan East

    --
    Better known as 318230.
  4. Pfft.... by Digitus1337 · · Score: 4, Funny

    That thing blows.

    1. Re:Pfft.... by Anonymous Coward · · Score: 5, Funny

      Technically, half of it sucks.

  5. Many bicycle riders do this by benhocking · · Score: 5, Informative

    It helps keep the pants leg from getting caught in the chain. Don't let that get in the way of your "gangsta" knowledge, however.

    --
    Ben Hocking
    Need a professional organizer?
  6. I can't believe Slashdot. by pclminion · · Score: 5, Funny

    This guy builds a trike with great glowing, whirling blades of death on the back and actually manages to ride it around for a while without getting shipped to Gitmo, and people just complain how it's not practical?

    You people fail utterly at nerd-dom.

  7. Looks like something for Burning Man by Animats · · Score: 3, Interesting

    The Burning Man crowd likes stuff like that. It's too late for this year's Department of Mutant Vehicles registration, though.

    By playa standards, this is unambitious. Check out the Neverwas Haul, a steam-powered 3-story Victorian house on wheels that moves under its own power.

  8. Reminds me of a pilot... by iknownuttin · · Score: 4, Interesting
    Actually, the bike pulls to the right. So by rolling up his right pant leg that side creates less drag, which helps trim the bike back to the left.

    I once knew a pilot for parachutists and he would trim the plane so well that all he did to turn was to lean in the direction he wanted to go. I believe it was a C172 or something small like that.

    --
    I prefer Flambe as apposed flamebait.
  9. Miyazaki did it first... by Arctech · · Score: 2, Informative

    Or at least drew it first in Kiki's Delivery Service.

  10. Re:Reminds me of a pilot... by pcnetworx1 · · Score: 2, Funny

    Only old Koreans would lean to turn a C172. It's all the rage now to do it in an Antonov, n00bs maybe can get away with a Starlifter

  11. Re:Dumbass Rolled Up Pant Leg by rrosales · · Score: 2, Insightful

    I believe the reason why he pulled his right pants leg is so that it doesn't get caught in the gears.

  12. "durr, they jump out of the way even..." by SuperBanana · · Score: 4, Insightful

    (from the video) "...and they jump out of the way even if they're 20 feet away."

    That's pretty smart on their part. Pay close, careful attention to how he restrains these spinning blades: A FUCKING PIPE CLAMP.

    Maybe if he's so smart with matlab, he can work out the pulling force at a few hundred RPMs on those blades, frighten himself, and put a bolt through the blade and hub shaft.

    Also, the design of the frame is pretty sketchy, with no bracing; he's relying purely on the static-load-bearing capacity of the tubing and his welds. If he collides with anything, the frame is going to come apart, and he stands a good chance of getting a chromalloy chest transplant.

  13. Re:Fan cage? Fully enclosed... by flyingfsck · · Score: 2, Funny

    Hmm, if he fully encloses the fan and adds a vacuum pump, then the fan will spin much easier and his forward speed will be pretty much the same...

    --
    Excuse me, but please get off my Pennisetum Clandestinum, eh!
  14. Re:No science by hotdiggitydawg · · Score: 4, Funny

    Can I hire that thing to get rid of my evil enemy Mr. Naughty? Well, Hans Reiser is otherwise occupied, so yeah, why not go with Plan B?

    (cue the smell of burning karma courtesy of humorless mods)...
  15. From TFA.... by argStyopa · · Score: 4, Funny

    "I spend a month a year working on a commercial fishing boat with a loud diesel engine, and the greatest sound in the world is to hear it turn off," says Damon Vander Lind, the creator of a soothingly quiet trike"

    As opposed to a normal trike, which operates with ear-shattering volume?

    --
    -Styopa