I have built a large combustion cannon amd want to upgrade to pnuematic. what valve is the best for the price? ive heard you can modify regular sprinkler valves to open 15x faster by venting them through a valve to the atmosphere are thease different than the shrade valves? are the shrade valves piston driven? I want a portable cannon that will shoot a potato from a 2" barrel 500 yards or better
my plan is to buy/build the best valve available and most designs i see are one air chamber on the bottom and one barrel on top. other than the diaphram/piston designs and im not to keen on not having a trigger if you know what i mean! and this is fine but for portability im limited for lenghth im thinking three chambers at the largest dia i can find into a tee or tees into a shrade valve or my homemade valve into a 2" barrel of half the lenghth for a three foot barrel what are my volume requirements for 3" tubing(barrel lenghth) and 2" tubing(barrel lenghth)? sorry for the long post but im the type that after my friends build their guns i build one that knocks the socks off theirs and im looking not at a simple design but something that has performance.
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