## Man plans to luanch himself 20ft in the air

 There is no subtle way to say this: Brian Walker plans to shoot himself nearly 20 miles into the air aboard a homemade rocket launched from what could be the world’s largest crossbow. (Seriously.)
http://www.wired.com/wired/archive/1...art.html?pg=11
Ok so how much froce would he need to fire him and is it possible?
And how likely will he die(99.9% or 99.99999998%)
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 Recognitions: Homework Help Science Advisor The article says 1,350 lbs of thrust. There was no indication of the distance over which that thrust would act so we have no way of evaluating whether he could achieve the speed necessary to rise 20 miles AND allow for very substantial air drag. Also, the probability that he will die during the event is 0. The FAA will not approve such a preposterous stunt.
 Um, this thread might not get the attention you'd hoped for, considering the wording of the title...

## Man plans to luanch himself 20ft in the air

 Quote by DaveC426913 Um, this thread might not get the attention you'd hoped for, considering the wording of the title...
Yes but I think I'am getting good enough attention.
 Recognitions: Gold Member I clicked on it just because the 20 foot thing sounded silly
 Recognitions: Science Advisor Tide, You'd be amazed at what they'll grant an experimental ticket for. Personally I think this guy is another in the line of morons that have a bit too much money and not enough sense to know that they don't know what they are doing.
 Recognitions: Homework Help Science Advisor The speed required to rise ballistically to a given height under the influence of gravity and drag is $$v_0 = v_T \sqrt {e^{2 g h /v_T^2}-1}$$ where $v_T$ is the terminal velocity. Try plugging a few numbers in! :)
 This reminds me of a certain scene from Dr. Strangelove...
 Recognitions: Gold Member Is this year's Darwin Award spoken for yet?
 Recognitions: Homework Help Science Advisor No, but I'll second that nomination! :-)

 Is this year's Darwin Award spoken for yet?