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12g CO2 Formula Question (4200/CV=CP)

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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12g CO2 Formula Question (4200/CV=CP)

Unread postAuthor: Howzer » Wed Oct 03, 2012 6:47 pm

To calculate the pressure for any non-given value, use this equation, but note that the pressure can't go above 800 PSI (the vapor pressure of CO2).

4200/Chamber Volume In ci=Chamber Pressure in psi -OR- 4200/CV

-From CO2 Cartridge in the wiki.

Where does the constant, 4200, come from? I have a class tomorrow and plan on bringing in my launcher(filled using 12g CO2), but I would really like to be able to explain as much of the physics as possible. If anyone knows, I would greatly appreciate the information!
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Unread postAuthor: jackssmirkingrevenge » Wed Oct 03, 2012 11:35 pm

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