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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.

3000 psi hand pump :O

Discussion about Compressors, hose, pipes, fittings, launchers, release mechanisms, and launch tubes.
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Jelo
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3000 psi hand pump :O

Post by Jelo » Sun Jun 19, 2011 6:48 pm

Hey guys,

Look at what i found, its used to fill paintball tanks: http://www.pyramydair.com/s/a/Air_Ventu ... P_guns/459

At that pressure the air turns liquid but i bet you could stop at 2000 psi 8) I definitely dont need it yet but just throwing it out there for high pressure guys


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teper
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Re: 3000 psi hand pump :0

Post by teper » Sat Nov 12, 2011 8:35 am

it would be cool if instead of using water in the water rocket, you used liquid air. :D :mrgreen: :lol:



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Re: 3000 psi hand pump :0

Post by U.S. Water Rockets1 » Sat Nov 12, 2011 11:02 pm

teper wrote:it would be cool if instead of using water in the water rocket, you used liquid air. :D :mrgreen: :lol:
If you did that then the air would phase change to gas on the way out. You could use that to great effect in a C/D nozzle to get a lot of extra power. Sadly, it would be a compressed air rocket and not a water rocket.


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Brian
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Re: 3000 psi hand pump :O

Post by Brian » Sun Nov 13, 2011 8:41 pm

The atmosphere is saturated with water in gasous form and 3000psi of air will contain alot of water. Due to a rapid depressurization apon launch, the water should leave soloution and precipitate as water in its liquid state. This is erelivant because the water is still present in solution.
Is the reaction mass required to be seporate from the pressurized gas to be classified as a water rocket?
A hygrometre would probably be needed to find water content.


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Re: 3000 psi hand pump :O

Post by WRA2 » Sun Nov 13, 2011 9:48 pm

Brian wrote:The atmosphere is saturated with water in gasous form and 3000psi of air will contain alot of water. Due to a rapid depressurization apon launch, the water should leave soloution and precipitate as water in its liquid state. This is erelivant because the water is still present in solution.
Is the reaction mass required to be seporate from the pressurized gas to be classified as a water rocket?
A hygrometre would probably be needed to find water content.
Hi Brian

Any water in the air would be frozen by the phase change of the liquid oxygen turning back into gas.

A rocket powered by a liquid "boiling off into gas" would be considered a "phase change" or "steam rocket".


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Tommy
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Re: 3000 psi hand pump :O

Post by Tommy » Sat Apr 07, 2012 3:06 pm

That sure wouldtake a long time to pump, and the cylinder that :D :D /pushes the air would have to be very small to get leverage. I think it would be impractical, but hey, what do I know? It could work...



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Re: 3000 psi hand pump :O

Post by Tommy » Sat Apr 07, 2012 3:08 pm

Woops, I didn't mean to put those smileys there.



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Re: 3000 psi hand pump :O

Post by U.S. Water Rockets1 » Sat Apr 07, 2012 9:54 pm

Tommy wrote:That sure wouldtake a long time to pump, and the cylinder that :D :D /pushes the air would have to be very small to get leverage. I think it would be impractical, but hey, what do I know? It could work...
If the small cylinder was used as a second or 3rd stage for a multiple stage compressor, it would be just the right size.


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Re: 3000 psi hand pump :O

Post by Lasheyda » Sun Jun 17, 2012 6:58 pm

I own a pump like that for my PCP airgun, the output of air per pump is quite good. (though, it would still take a long time to fill a high volume water rocket.)



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Re: 3000 psi hand pump :O

Post by Reptiglorandrockets » Mon Nov 11, 2013 4:06 pm

Lasheyda wrote:I own a pump like that for my PCP airgun, the output of air per pump is quite good. (though, it would still take a long time to fill a high volume water rocket.)
Late reply, but what gun do you have? I have a Benjamin Marauder .22 but the pump burned out within the 30th time refilling the gun.


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