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Since our founding in 2003, we've become the largest, most sophisticated and ground breaking group supporting you, the serious water rocket flyer! Whether you are a beginner or an expert, the WRA2 has something for everyone.

A water rocket is a type of model rocket using water as its reaction mass. The pressure vessel (the engine of the rocket) is constructed from thin plastic or other non metallic materials (usually a used plastic soft drink bottle) weighing 1,500 grams or less. The water is forced out by compressed air. It is an example of Newton's third law of motion.

:WRA2: Newest WRA2 members: :WRA2:

Chief Joseph 8th grade science team from Richland, USA Our 1,000th team!!!!!!
Chris Wright from Hemel Hempstead, United Kingdom,
and Kingston Rocketry Club from Kingston upon Thames, United Kingdom

Johnny Jetpack

Post links to your team website here. Please include a description and tell us if you want your link added to the main WRA2 links page.
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Johnny Jetpack

Postby rockets-in-brighton » Thu May 28, 2009 6:37 am

Cheers
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Re: Johnny Jetpack

Postby Andromeda » Sat Jun 06, 2009 10:28 am



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.
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Re: Johnny Jetpack

Postby rockets-in-brighton » Mon Jun 08, 2009 9:26 am

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.
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Re: Johnny Jetpack

Postby RaZias » Tue Jun 09, 2009 3:12 am

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 !!!
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Re: Johnny Jetpack

Postby Spaceman Spiff » Tue Jun 09, 2009 8:37 am

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!
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Re: Johnny Jetpack

Postby rockets-in-brighton » Tue Jun 09, 2009 5:20 pm

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.
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Re: Johnny Jetpack

Postby Andromeda » Wed Jun 10, 2009 11:03 pm

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.
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Re: Johnny Jetpack

Postby RaZias » Thu Jun 11, 2009 2:49 am

I saw that in youtube ...I just don't know where is the link.
How many bottles where exactly ? Like 60 or something ?
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Re: Johnny Jetpack

Postby Spaceman Spiff » Thu Jun 11, 2009 4:33 pm

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!
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Re: Johnny Jetpack

Postby RaZias » Fri Jun 12, 2009 8:10 am

Research and Development is the soul of WR
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Re: Johnny Jetpack

Postby RaZias » Fri Jun 12, 2009 2:27 pm

Research and Development is the soul of WR
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Re: Johnny Jetpack

Postby Cloud Dancers » Tue Jun 16, 2009 9:14 pm




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

Postby teper » Thu Nov 10, 2011 7:07 pm

The video has been removed. :( :cry:

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