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First gun shoots sort of but not really.

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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First gun shoots sort of but not really.

Unread postAuthor: Bipedal » Wed Oct 25, 2006 9:35 pm

I built a pneumatic cannon, and it works okay on paper. Sort of. I use a 1" JTV-100 RainBird valve, a 2' long 2" pressure tank, and a 2' long 1.5" breech loading barrel. It's not got leaks, but when I fire it at like 70 psi it's not very impressive. Stuff just sort of poofs out the end and falls flat. (I haven't modded the valve yet so it also honks and doesn't release as much air at once as it probably could.) Is my c:b ratio going to be really bad? None of my local hardware stores had pressure rated 3" pipes, I would have used that for the chamber.
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lol internet.
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Unread postAuthor: Slugfoot » Wed Oct 25, 2006 10:30 pm

I believe that if your valve is honking then it should be fitted with a larger size pilot valve or the pilot you are using is not opening fast enough.....what are you using to pilot it?
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Unread postAuthor: Bipedal » Wed Oct 25, 2006 10:36 pm

Standard solenoid that came with it. I've got a blowgun and the connectors I need, I just need to buy some method of tapping a hole, some epoxy, and some hose and clamps. Anyone have pictures of modding theirs?
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Unread postAuthor: Slugfoot » Wed Oct 25, 2006 11:42 pm

There is a full tutorial in in a sticky in the "how to" database on this site. You should find that very useful. Good luck. Let us know how you get on.
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Unread postAuthor: Bipedal » Thu Oct 26, 2006 6:37 am

Excellent. Thanks.
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