need help with paintball cannon

[quiggly17]

im building a paintball cannon with a 20in long 1.5in barel i dont know how big of a air chamber to make using a 1.5in pipe please help

[iPaintball]

If you plan on making the chamber with the same size pipe, mak it as long as the barrel. You really should use larger pipe though.

[hi]

what pressure d you plane to take it to?

i would say about 15 inches would be good at 100 psi.

[quiggly17]

if i use a 2 in pipe would it need to be roughly half as long i plan to take it to about 100 psi to 125 psi no more than that also can i use a regulator from a autobody paint gun im not sure wat there rated

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[iPaintball]

Are you planning on regulating CO2? If so, you need a regulator specifically made for use with CO2.

[quiggly17]

maybe im unsure at this point i might just use a 12 gram co2 converter for it im still in the planning stage and want more info what do u recommend i would like to regulate co2 for the higher rate of fire

[iPaintball]

Well, regulators from air tools have a pressure limit of about 200 psi, so you can't use one to regulate CO2. You would have to buy a beverage or paintball reg.

[quiggly17]

are u talkin about like a beer keg regulator i just dont have $100 dollars to put towards just a regulator i might try ebay