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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.

Solar Hot air Ballons

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RaZias
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Joined: Mon Jul 14, 2008 3:16 pm

Solar Hot air Ballons

Post by RaZias » Sat Jul 18, 2009 12:56 pm

Here is a video of a hot solar ballon, I think anyone can make this:



See how to make them:

http://www.solar-balloons.com


Research and Development is the soul of WR

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