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FINALLY!!!!

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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FINALLY!!!!

Unread postAuthor: squeaks » Fri Dec 15, 2006 8:15 pm

I've finally made my piston valve and got it to work consistantly. On my first gun I made a chamber sealing one, but the face or the o-rings never seemed to work at the same time. Now, after trying about 10 kinds of rubber, 5 pistons, breaking 2 o-rings and ruining 4 others, and a lot of oh my gosh darn flippen hecks said I have made a barrel sealer that works. I ended up just using some old truck tire tubes for the face. I'll post the gun here in a few days, maybe even some damage pics, videos, etc.
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Unread postAuthor: richardbridges » Fri Dec 15, 2006 8:38 pm

Congratulations!!! :D What diameter is your piston?
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Unread postAuthor: squeaks » Fri Dec 15, 2006 8:40 pm

It's a 2 inch porting barrel sealing piston housed in a 3 inch tee. It seals against a 2 inch coupler I cut in half and sanded the stop out of. That way I was going to have it nice and square no matter how straight I cut the end of the pipe I pushed through the bushing. As a bonus It also helps increase the pressure differential when the piston begins to move.

It's also piloted by a 1 inch ball valve so it actuates dang quick.
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Unread postAuthor: MrCrowley » Sat Dec 16, 2006 1:30 am

What did you use for the body of the piston, I've made a 3" piston but I had to make a mold for it to fit nice.
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Unread postAuthor: squeaks » Sat Dec 16, 2006 6:42 pm

I used the schools lathe and made it out of wood. It has grooves for o-rings on it, but since I've broken/ruint so many my uncles store is out and I'm searching local car part stores.
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Unread postAuthor: MisterSteve124 » Sat Dec 16, 2006 6:50 pm

thats why I just bought a mauler from gort lol I would have rather tried to make it but it probably would have gotten all messed up like yours. And it wouldn't be half as good.
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Unread postAuthor: squeaks » Sat Dec 16, 2006 6:53 pm

Well, now that I've screwed up so many times I've found every way not to make a piston valve. I figure I could probably make one in a day or so now. It's been well worth my time.

I finally got the barrel and it's support on. I'll post some pictures tomorrow.
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