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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.

Achievement Get! Rocket in A Tree

Discussions about rockets, construction materials, adhesives, nozzles, nosecones and fin design.
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Pere Ubu
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Achievement Get! Rocket in A Tree

Post by Pere Ubu » Wed Sep 13, 2017 1:22 pm

Went out yesterday morning to test my new launchers; fitted the Gardena nozzle rocket to the launcher with some water in it (didn't measure; maybe 100 ml or so), pumped it up to 35 PSI, and launched. Beautiful liftoff, the rocket got to apogee maybe 50 feet or so, paused, gracefully arced over... and plopped itself into a tree in the neighbor's yard. Where it still is - I tried throwing sticks at it, but couldn't hit it. So there's my handmade Gardena nozzle, my Quest foam fin assembly, and a 1 liter bottle waiting for the next strong wind for recovery.
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Why your rocket is unstable = CN⍺1/2⍴v2⍺Ar

Northeast Pataphysical Institute, Aerospace Division

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anachronist
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Re: Achievement Get! Rocket in A Tree

Post by anachronist » Thu Sep 14, 2017 9:43 pm

I hope you didn't have an expensive altimeter and onboard video camera in there!

Getting my rocket stuck in a tree is my worst fear about this hobby. Open space is rather scarce around where I live.



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