Page 1 of 1

Johnny Jetpack

Posted: Thu May 28, 2009 6:37 am
by rockets-in-brighton
[youtube][/youtube]

Re: Johnny Jetpack

Posted: Sat Jun 06, 2009 10:28 am
by Andromeda
rockets-in-brighton wrote:[youtube][/youtube]
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.

Re: Johnny Jetpack

Posted: Mon Jun 08, 2009 9:26 am
by rockets-in-brighton
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.
The artist has a website http://www.johnnyjetpack.com/

The dummy is certainly not human-weight, but it is an impressive sight anyway.

Re: Johnny Jetpack

Posted: Tue Jun 09, 2009 3:12 am
by RaZias
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 !!!

Re: Johnny Jetpack

Posted: Tue Jun 09, 2009 8:37 am
by Spaceman Spiff
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 !!!
You mean the record setting rocket would lift an average man less than half a meter into the air? That's pretty weak!

Re: Johnny Jetpack

Posted: Tue Jun 09, 2009 5:20 pm
by rockets-in-brighton
Spaceman Spiff wrote:
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 !!!
You mean the record setting rocket would lift an average man less than half a meter into the air? That's pretty weak!
That's exactly why I couldn't fathom what the jet plane guy was smoking. His numbers just didn't add up.

Re: Johnny Jetpack

Posted: Wed Jun 10, 2009 11:03 pm
by Andromeda
rockets-in-brighton wrote:
Spaceman Spiff wrote:
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 !!!
You mean the record setting rocket would lift an average man less than half a meter into the air? That's pretty weak!
That's exactly why I couldn't fathom what the jet plane guy was smoking. His numbers just didn't add up.
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.

Re: Johnny Jetpack

Posted: Thu Jun 11, 2009 2:49 am
by RaZias
I saw that in youtube ...I just don't know where is the link.
How many bottles where exactly ? Like 60 or something ?

Re: Johnny Jetpack

Posted: Thu Jun 11, 2009 4:33 pm
by Spaceman Spiff
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 ?
If you can find it, please post the link. Thanks!

Re: Johnny Jetpack

Posted: Fri Jun 12, 2009 8:10 am
by RaZias
I think this is the video:


Re: Johnny Jetpack

Posted: Fri Jun 12, 2009 2:27 pm
by RaZias
[youtube][/youtube]

Re: Johnny Jetpack

Posted: Tue Jun 16, 2009 9:14 pm
by Cloud Dancers
RaZias wrote:[youtube][/youtube]

I wonder if that guy had to sign a release before getting on that thing :roll:

Re: Johnny Jetpack

Posted: Thu Nov 10, 2011 7:07 pm
by teper
The video has been removed. :( :cry: