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Semi-Auto Barrel Sealing Piston Valve?

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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Semi-Auto Barrel Sealing Piston Valve?

Unread postAuthor: spudkilla224 » Wed Jul 22, 2009 8:40 am

Hello everyone, I'm in the process of designing a Semi-Auto Barrel Sealing Piston Valve. And I was wondering if it would even be possible? And if someone has already done it?

I would be changing the piston to a piston somewhat like Clide's Semi GB Cannon, like a piston on a threaded rod. It's just how to attach the second air tank to fill right after I shoot the first shot from the main tank.
and not allowing the air from the second tank in the first air chamber until after I shoot.

Any Suggestions?

:D
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Unread postAuthor: jackssmirkingrevenge » Wed Jul 22, 2009 8:52 am

There are plenty of semi-auto QEV launchers on this site that would qualify. You don't need a second tank, just a pilot valve that opens briefly and a spring behind the piston to reset it.
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Unread postAuthor: inonickname » Wed Jul 22, 2009 9:06 am

Yep, nothin to it. For example I can leave my rifle hooked up to an airline and fire semi automatic (as fast as the chamber can fill).
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