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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.

Guide Rails

Discussion about Compressors, hose, pipes, fittings, launchers, release mechanisms, and launch tubes.
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chemdude
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Guide Rails

Post by chemdude » Sat Mar 12, 2011 5:39 pm

I built a 10 liter rocket and when it launched, it immediately pitched over and a tree peeled the fins off. I need help for a rocket launcher stabalizer.



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Re: Guide Rails

Post by WRA2 » Sat Mar 12, 2011 5:52 pm

chemdude wrote:I built a 10 liter rocket and when it launched, it immediately pitched over and a tree peeled the fins off. I need help for a rocket launcher stabalizer.

What size nozzle are you using? Usually unstable flight like you describe is a sign that the nozzle is too small. A larger nozzle will enable the rocket to fly faster thus achieving stable flight.

Have you tried a launch tube? Launch tubes make guide rails unnecessary.


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U.S. Water Rockets1
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Re: Guide Rails

Post by U.S. Water Rockets1 » Sat Mar 12, 2011 11:47 pm

chemdude wrote:I built a 10 liter rocket and when it launched, it immediately pitched over and a tree peeled the fins off. I need help for a rocket launcher stabalizer.
Either the nozzle is too small for the volume of the rocket, or the pressure is too low for the size of the rocket. If you are at maximum pressure your rocket can take, then you need a launch tube or an external guide. You can make an external guide out of metal tubing or pipes or even out of wood. The way you make it is really not that critical, as long as it doesn't pinch the rocket. You can enhance it when you have a working design by adding teflon tape to the surfaces that touch the rocket. Teflon will make it nearly frictionless.


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