Welcome to the Water Rocket Forum, sponsored by The Water Rocket Achievement World Record Association.

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: NewestWRA2members: :WRA2:

David Currier from Elwood, IN, USA,
Dave Swift from Cortlandt Manor, NY USA,
Silfo from Comodoro Rivadavia, Argentina,
China_WaterRocket from DongGuang, China


Voting to approve the Khairul- SMK Seksyen 24(2) water rocket's Class D record submission of 281.07 feet (85.67 meters) will run March 5th to March 19th.

The submission details can be found here: viewtopic.php?f=24&t=2969

Voting: viewtopic.php?f=24&t=2970&p=19204

Efficiency contest

This forum is for non-members to ask questions about our competitions. Please check our FAQ page before you ask.
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Brian
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Efficiency contest

Postby Brian » Sat Sep 13, 2008 8:43 am

i recon there should be an efficiency contest.
you have a normal 2L bottle and launch it at 100psi. so you have to think of new (or the best) ways to launch it higher. it would be a good way to measure the most efficiency rockets. what do you think?


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RaZias
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Re: Efficiency contest

Postby RaZias » Sat Sep 13, 2008 10:28 am

Maybe the best height/weight/volume ratio contest ?


Research and Development is the soul of WR
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Tim Chen
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Re: Efficiency contest

Postby Tim Chen » Mon Sep 15, 2008 12:12 pm

Brian wrote:i recon there should be an efficiency contest.
you have a normal 2L bottle and launch it at 100psi. so you have to think of new (or the best) ways to launch it higher. it would be a good way to measure the most efficiency rockets. what do you think?


I think it would be too hard to know if the rocket had 100PSI in it and too hard to know if the rocket went a certain height without an altimeter, which is too expensive for most people. I suppose you could ask someone be a witness, but what's to stop you from asking your buddy or relative?


Tim Chen
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