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1" porting copper piston?

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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Unread postAuthor: Hawkeye » Sat Mar 31, 2007 3:34 pm

It doesn't make sense to put the effort into making the piston anti backflow and then include so much metal in it. Make it lighter.
Three rubber washers on a bolt with one nut and an o-ring can accomplish the task much more efficiently.
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