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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.

looking to do a 2 stage rocket

Discussion about Compressors, hose, pipes, fittings, launchers, release mechanisms, and launch tubes.
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happy
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looking to do a 2 stage rocket

Post by happy » Thu May 13, 2010 8:11 pm

how exactly does it work....do you pressureize the 2nd stage then hook it up to the main stage and then when the first stage is complete the mechanism to the second stage becomes released?

whats the easiest mechanism setup to do?
whats gardena and where can i get it?
what are cable tie launchers? is it something for a 2nd stage?



happy
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Re: looking to do a 2 stage rocket

Post by happy » Thu May 13, 2010 8:12 pm

by complete i mean empty-ed



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Re: looking to do a 2 stage rocket

Post by WRA2 » Thu May 13, 2010 8:24 pm

happy wrote:how exactly does it work....do you pressureize the 2nd stage then hook it up to the main stage and then when the first stage is complete the mechanism to the second stage becomes released?

whats the easiest mechanism setup to do?
whats gardena and where can i get it?
what are cable tie launchers? is it something for a 2nd stage?

Usually pressurization is done to both stages simultaneously. It is not recommended to handle a pressurized rocket EVER! You could be seriously injured or even killed!

The easiest mechanism for staging is called a "crushing sleeve"

Gardenia refers to "quick connect fittings" that are made for garden hoses (Use non metallic ones)

Cable tie launchers are made using "zip ties" which can be fastened to a pipe in a manner which can hold the rocket in place.

Please use the search function to gather examples of all of the above.


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:WRA2:The Water Rocket Achievement World Record Association :WRA2:

happy
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Joined: Thu May 13, 2010 4:49 pm

Re: looking to do a 2 stage rocket

Post by happy » Thu May 13, 2010 9:12 pm

im not really understanding how both can be presserized at the same time..
so like is one 4l rocket pretty much going to give the same results as two 2l stages for the rocket?



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Re: looking to do a 2 stage rocket

Post by WRA2 » Thu May 13, 2010 9:23 pm

happy wrote:im not really understanding how both can be presserized at the same time..
so like is one 4l rocket pretty much going to give the same results as two 2l stages for the rocket?
Usually a one way valve is used to keep the pressure in the upper stage from escaping until staging occurs. The valve will let air in from the bottom stage but not out until staging is actuated.


Lisa Walker,
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:WRA2:The Water Rocket Achievement World Record Association :WRA2:

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