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[Solved]How many times can my CO2 cylinder charge my cannon?

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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[Solved]How many times can my CO2 cylinder charge my cannon?

Unread postAuthor: Bluetooth » Sun Apr 11, 2010 1:26 pm

I was wondering if anyone new the theory, or even more useful, some equations, to figure out how many times a CO2 cylinder with a defined amount of CO2 can fill a chamber with a defined volume to a defined PSI. For example, a 9 oz (avoirdupois ounces) CO2 cylinder, and a chamber with a volume of 188 fl oz to 100 PSI. Either that, or how to find the volume (at atmospheric pressure) of a defined volume of gas pressurized to a defined pressure, and the volume (at atmospheric pressure) of a defined amount of gas or liquid (weighed in avoirdupois ounces).

I want to know this so I can figure out how many times I could fill a potato cannon from a paintball CO2 cylinder.

Thanks!

P.S. If I find out how to do this, I'll write up a calculator/app in C to make it easier for future calculations.
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Last edited by Bluetooth on Sun Apr 11, 2010 4:11 pm, edited 1 time in total.
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Unread postAuthor: whitexnightjp » Sun Apr 11, 2010 2:49 pm

first do you have a cannon with the proper materials to withstand Co2.
second do you have a regulator that you can connect to you cannon from your Co2 tank
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Unread postAuthor: Bluetooth » Sun Apr 11, 2010 2:52 pm

Do I need specific materials? PVC can't handle it? I figured that it could handle any gas really (oxygen, nitrogen, CO2, helium, air), as long as it's a pressure the cannon is rated for. Yes, I do intend to use a regulator (I'm not going to push 1000 PSI (it's hot here in Florida) into schedule 40 PVC).
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Unread postAuthor: Gun Freak » Sun Apr 11, 2010 3:46 pm

The Hubb Library has EXATCLY what you are looking for...
Near the bottom of this page.
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Unread postAuthor: Bluetooth » Sun Apr 11, 2010 4:10 pm

Gun Freak wrote:The Hubb Library has EXATCLY what you are looking for...
Near the bottom of this page.


That is EXACTLY what I was looking for! Thank you! I can look at the equation that way too.
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