Johnny Jetpack
Posted: Thu May 28, 2009 6:37 am
[youtube][/youtube]
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That was amusing. I sthere any more information about this? I am curious to know if the dummy they fly is as heavy as a real human. If the dummy is realistic in mass then we have some proof that the water rocket motor can really lift off a human being like they tried to prove on the muthbusters show.rockets-in-brighton wrote:[youtube][/youtube]
The artist has a website http://www.johnnyjetpack.com/Andromeda wrote: That was amusing. I sthere any more information about this? I am curious to know if the dummy they fly is as heavy as a real human. If the dummy is realistic in mass then we have some proof that the water rocket motor can really lift off a human being like they tried to prove on the muthbusters show.
You mean the record setting rocket would lift an average man less than half a meter into the air? That's pretty weak!RaZias wrote:I once made the calculation about the force necessary to lift an human weight, it seemed that you needed 5 US-water-rockets to rise 2 meters !!!
That's exactly why I couldn't fathom what the jet plane guy was smoking. His numbers just didn't add up.Spaceman Spiff wrote:You mean the record setting rocket would lift an average man less than half a meter into the air? That's pretty weak!RaZias wrote:I once made the calculation about the force necessary to lift an human weight, it seemed that you needed 5 US-water-rockets to rise 2 meters !!!
Has anyone seen the clip of the TV show from Asia (I do not know what country) where someone showed a water rocket powered chair that lifted a man? They gave the exact maths to show how it worked.rockets-in-brighton wrote:That's exactly why I couldn't fathom what the jet plane guy was smoking. His numbers just didn't add up.Spaceman Spiff wrote:You mean the record setting rocket would lift an average man less than half a meter into the air? That's pretty weak!RaZias wrote:I once made the calculation about the force necessary to lift an human weight, it seemed that you needed 5 US-water-rockets to rise 2 meters !!!
If you can find it, please post the link. Thanks!RaZias wrote:I saw that in youtube ...I just don't know where is the link.
How many bottles where exactly ? Like 60 or something ?
RaZias wrote:[youtube][/youtube]