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Spud guns with built in pumps?

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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Spud guns with built in pumps?

Unread postAuthor: Spectrabox » Fri Dec 05, 2014 12:18 pm

I always thought having a spud gun with a built in pump would be pretty cool, endless shots without any need for a bicycle pump or air compressor. Anybody ever tried this before? I'd imagine pumping it like a shotgun would be too difficult, but maybe something like a crossbow design where you put it down on the ground with a foothold would work better.
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Re: Spud guns with built in pumps?

Unread postAuthor: jrrdw » Sat Dec 06, 2014 9:09 am

Iv'e seen shock pumps mounted below barrels, so yea it's been done. Works well with plinkers that have small chambers.
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Re: Spud guns with built in pumps?

Unread postAuthor: dajoro » Tue Dec 09, 2014 4:12 pm

Hmm... something like this 3/4" bore-pumped balanced spool valve frozen grape launcher?
Screenshot_2014-12-09-13-09-52.png
Screenshot_2014-12-09-13-09-56.png
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Re: Spud guns with built in pumps?

Unread postAuthor: jackssmirkingrevenge » Mon Dec 22, 2014 6:54 am

Here's a nice French project with integrated underbarrel pump.
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