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first air gun

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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first air gun

Unread postAuthor: x2percentmilk » Sun Oct 26, 2008 6:36 pm

Hey everyone, this is my first air gun, the Arbitrary Object Displacement Device or AODD-1 (name thought up between my roomate and i).

The original intent of this gun was to make it a net gun, but ive spent too much money on it already and didnt have enough to go get a net/weight system.

Its a bit messy, and not that well thought out, but I didnt start building it until friday at like midnight, and I finally just finished this afternoon.

It uses a 2 inch barrel, and same size chamber. I wanted the option of firing alot of different ammo, and 2 seemed to be the right fit. The valve is a rainbird modified with a blowgun. Fill valve is a schrader drilled into the endcap and sealed with rtv silicone. Everything else is sealed with cement, except the blowgun where I used epoxy.

I can only get it up to 65-70 psi before the bikepump i have starts to blow air in my face, but even then the thing launches a potato effortlessly across a pretty good sized baseball field.

I have a small leak somewhere in the reducers for the gauge (might even be the gauge thread) So next weekend ill try to fix that.

Input, ideas for further improvement, and criticism is all welcome :)
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Last edited by x2percentmilk on Sun Oct 26, 2008 7:14 pm, edited 1 time in total.

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Unread postAuthor: iisthemuffin » Sun Oct 26, 2008 7:02 pm

Is there even a nipple connecting the blowgun to the valve?
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Unread postAuthor: x2percentmilk » Sun Oct 26, 2008 7:07 pm

yeah theres a threaded 1/4 inch piece that i drilled into the platic of the valve and screwed the blowgun onto. The blowgun threads leaked like crazy at first so i epoxied them up, put it on and let it dry, which is why it looks so messy haha.
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Unread postAuthor: iisthemuffin » Sun Oct 26, 2008 7:08 pm

Did you happen to use teflon tape? It helps seal imperfections in the threads and will also help thicken the piece up a bit to fill in small gaps.
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Unread postAuthor: x2percentmilk » Sun Oct 26, 2008 7:15 pm

yeah i tried that first, it just wasnt happy with it
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Unread postAuthor: iisthemuffin » Sun Oct 26, 2008 7:19 pm

Oh well alrighty then
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