Half a croissant, on a plate, with a sign in front of it saying '50c'
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JumpWinch

Just four tickets a jump!
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If you can't make it to the Moon this year, this might be the next best thing. It's an amusement ride that provides a crude simulation of a reduced gravity environment. Imagine a fairly tall tower shaped somewhat like a gallows. There's a winch at the base, and it pulls on a cable that goes up the tower, through a pair of pulleys at the top of the tower, and back down to the ground, where it can be attached to a harness.

After they calibrate the winch controller to your weight, you slip on the harness and they turn the winch on. It pulls you up with a force equal to some fraction of your weight--say, about 2/3 to simulate Mars, or 5/6 for the Moon. If you're feeling really daring, you can get them to turn it up all the way to 99% and see how high you could go if you only weighed a pound or two. Then all you have to do is jump!

ytk, Oct 16 2009

NASA technical note on various low g simulators http://ntrs.nasa.go...6856_1970016856.pdf
[ldischler, Oct 16 2009]

Reduced gravity simulator photo http://mm04.nasaima...up=nasa&profileid=9
[ldischler, Oct 16 2009]

Bungee Trampoline http://www.bungeetrampoline.com/
Bungee-assisted trampoline jumping. Looks like a lot of fun. [jutta, Oct 16 2009]

[link]






       Three gantries and winches will be needed, thus allowing the jumper no only to move in the vertical plane, but also - within limits - to move around the "arena".   

       While this will simulate the effect of some aspects of lower gravity, the brain's perception of downforce will be unaltered; this will not be "free fall".   

       But it sounds intriguing. [+]
8th of 7, Oct 16 2009
  

       This sounds very derivative of the bungie type systems used for "American Gladiator" and other similar shows though I guess the mechanism is different enough. This is also certainly baked by Cirque du Soleil, but that doesn't mean it's generally known or even available. I'm still undecided.
MisterQED, Oct 16 2009
  

       It's an amusement park attraction (see link), but I've never actually seen one up close.
jutta, Oct 16 2009
  

       ytk's idea sounds more like a flying harness, than a bungee system.   

       Flying harnesses are used in plays (think Peter Pan), tv, movies, etc., to produce the effect of a person flying.   

       One problem I foresee is that if your weight is reduced enough, you might jump, and continue rising until you smash into the pulley at the top.
goldbb, Oct 18 2009
  

       Well, you could set up a system of locks to prevent the user from getting too close to the walls and ceiling.   

       Or wear a helmet!
DrWorm, Oct 19 2009
  

       (+) I like it, but does it remind anyone else of 'counter ballance world'?   

       Where did that go anyway?   
      
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