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first pneumatic cannon

Posted: Wed Jan 23, 2008 9:35 pm
by brad1780
this is my first attempt at a pneumatic cannon. it has a 1" sch 40 by 4 foot long barrel. it uses a 1" lawn genie sprinkler valve with a 2" sch 40 by 2 foot chamber. Besides the out of control primer which will be painted shortly, give me your opinions.
thanks

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Posted: Wed Jan 23, 2008 9:37 pm
by ShowNoMercy
Please, please tell me you didn't hot glue your accessories in? Other than that nice job.

Posted: Wed Jan 23, 2008 9:38 pm
by SpudUke5
Very nice

what is the pop off valve rated too (as in when it opens)?

Posted: Wed Jan 23, 2008 9:38 pm
by elitesniper
hot glue?? :shock: , nice cannon anywhoo, good way to start off.

Posted: Wed Jan 23, 2008 9:46 pm
by brad1780
i had some VERY MINOR leaks after i screwed the pop off valve in so i just put a little hot glue on there to try to seal it up a bit. worked pretty well. the valve is set at 115 psi.

Posted: Wed Jan 23, 2008 9:47 pm
by ShowNoMercy
You should invest in some epoxy, I think it will work better for this purpose. Even some thread sealant.

Posted: Wed Jan 23, 2008 9:49 pm
by brad1780
i just glued it yesterday to get a few test fires in. i plan to fix things with epoxy when i get a chance toworrow.

Posted: Wed Jan 23, 2008 9:51 pm
by pizlo
Quite a bit better than my first, which has not been posted here out of embarrassment.

Posted: Wed Jan 23, 2008 9:53 pm
by potatoflinger
That's pretty nice, I'll bet it has a decent amount of power. What color are you going to paint it?

Posted: Wed Jan 23, 2008 9:57 pm
by brad1780
i think i am going to paint just flat black. it is pretty powerful. i put a C battery through a fence board from about 45 feet at 60 psi.

Posted: Wed Jan 23, 2008 10:30 pm
by bigbob12345
Very similar to a gun I posted on here recently the chamber is just a little smallerhttp://www.spudfiles.com/forums/my-most-recent ... 12468.html
Good job all together but get some epoxy

Posted: Thu Jan 24, 2008 5:36 am
by psycix
bigbob12345 wrote:Very similar to a gun I posted on here recently the chamber is just a little smallerhttp://www.spudfiles.com/forums/my-most-recent ... 12468.html
Good job all together but get some epoxy
When I click your link my browser tells me it cant open "smallerhttp://" :P
Fixed link:
http://www.spudfiles.com/forums/my-most ... 12468.html