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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.

LaunchPad AlTImeter Technical Support Forum

Discussion about deployment systems including altimeters, timers, air speed flaps, servo systems, and chemical reactions.
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anachronist
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Re: LaunchPad AlTImeter Technical Support Forum

Post by anachronist » Fri Jul 20, 2018 2:36 am

I've seen a test in which the altimeter and servo were put in a large jar, with a straw sealed into the lid. Close the lid and suck gently on the straw to drop the pressure in the jar (it doesn't take much) to simulate a rise in altitude.



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