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copper coaxial

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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copper coaxial

Unread postAuthor: haulinick » Sun Oct 15, 2006 12:45 am

I plan on making a copper coaxial piston cannon. It will have a 1/2" barrell in a 1" chamber. I already did the math and it should have a c:b ratio of about 3:1. I'm trying to make it as basic as possible. The only thing is, I've never seen a copper coaxial and I'm wondering if there is a reason that I might be over looking??
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Unread postAuthor: MrCrowley » Sun Oct 15, 2006 1:22 am

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Unread postAuthor: frankrede » Sun Oct 15, 2006 2:56 am

Hmm, a copper coaxial would look good. if done right.
Dang, my home depot and lowes suck I dont think mine has 1 in copper.
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Unread postAuthor: Copperboy » Sun Oct 15, 2006 8:01 am

http://i103.photobucket.com/albums/m128 ... 4289d0.jpg
There´s mine, although it´s just a 18mm cal. Works great! :D
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Unread postAuthor: haulinick » Sun Oct 15, 2006 1:21 pm

That looks like it would be pretty effective, copperboy. I'm going to go to home depot in a little bit and begin my adventure.
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Unread postAuthor: joannaardway » Sun Oct 15, 2006 3:26 pm

I have heard horror stories about how hard it can be to get the inner pipe lined up right, and the fittings are much harder to modify than PVC.

But, if it works, good for you.
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Unread postAuthor: Infernal Maveric » Sun Oct 15, 2006 4:32 pm

The fittings are easy to modify, as you can chop, and re-solder parts where needed.

the lining up takes a bit of trial & error, but its nothing that would take longer than say 20 minuites

Good luck
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Unread postAuthor: haulinick » Sun Oct 15, 2006 8:10 pm

made it today. Its a monster. heres the link with pics and info http://www.spudfiles.com/forums/viewtop ... 458&#39458
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