Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
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spudkilla224
- Private 4

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- Joined: Wed Mar 19, 2008 8:04 pm
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?

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jackssmirkingrevenge
- Five Star General

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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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inonickname
- First Sergeant 4

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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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