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First Pneumatic

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 Pneumatic

Unread postAuthor: Eddbot » Fri Nov 16, 2007 9:41 pm

this is my first pneumatic, have made a few combustions but that was before i knew about spudfiles, anyways here it is, not completely finished, gonna make it breech loading, sleeve the barrel and hide the electronics and paint it 8)

whole gun
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stock
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electronics
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nail wrapped in duck tape at 20psi-entrance
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nail wrapped in duck tape at 20psi-exit
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Unread postAuthor: Hubb » Fri Nov 16, 2007 9:44 pm

I like the trigger. Also, that is a pretty clean primer job...looks like you took your time. I would suggest modding the valve, but someone else well.


Nice Job.
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Unread postAuthor: mopherman » Fri Nov 16, 2007 9:48 pm

Looks good.Your chamber seems to be massive overkill.I would lose the large diameter tank.(or trim it down) Also, I think it would be a good idea to modify the valve. I know its scary at first, but it really is easy.
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Unread postAuthor: Hubb » Fri Nov 16, 2007 9:50 pm

hubb017 wrote:...I would suggest modding the valve, but someone else will...


mopherman wrote:...Also, I think it would be a good idea to modify the valve...


And it took all of four minutes :lol:
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Unread postAuthor: elitesniper » Fri Nov 16, 2007 9:51 pm

hey thats a pretty nifty gun there looks nice and must be fun to shoot yea like hubb said modding it would increase performance by a bunch, but overall nice gun:D i have one question though how come u have those 3 couplers down there?
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Unread postAuthor: mopherman » Fri Nov 16, 2007 9:53 pm

hubb017 wrote:
hubb017 wrote:...I would suggest modding the valve, but someone else will...


mopherman wrote:...Also, I think it would be a good idea to modify the valve...


And it took all of four minutes :lol:

predictable eh? well, i just hate messing about with unnecessary electronics.
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Unread postAuthor: Eddbot » Fri Nov 16, 2007 10:01 pm

i was thinkin about modding it but i decided for my first i would make it relatively simple, plus i like the idea of having a safety switch cuz i don't wanna shoot nobody with a nail, that would be bad, there is one thing though it sorta honks a little, if i use a round that fills up the barrel all the way, i only hear the pffthmp, but if it's not a perfect fit it honks alot
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Unread postAuthor: Hubb » Fri Nov 16, 2007 10:33 pm

@Eddbot: Have you checked out the sticky about Sprinkler Valve Troubleshooting? It may answer your honking question.
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Unread postAuthor: Eddbot » Sat Nov 17, 2007 1:21 am

no, i completely forgot about it, thanks for reminding me
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Unread postAuthor: Hubb » Sat Nov 17, 2007 4:06 am

You may as well go ahead and mod the sprinkler valve. You can upgrade this one. Why not? It's your first and you should be proud.

As far as the upgrades, you may can incorporate something similar to this:
Image
This is not my design. I found it on this sight and thought it was neat.

Of course, as far as safety is concerned, a ball valve can be placed in between the valve and the handle to keep it from firing when you don't want it to.

Anyway, good luck with it.
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Unread postAuthor: wangpushups » Sat Nov 17, 2007 4:22 am

One suggestion, when you plan on double sleaving the pvc to make it look nicer, just mark it off with a sharpie and cut it, before glueing so it'll all fit perfectly. There's a bunch of gaps in between the couplings and it causes the gun to bend weirdly. The gun looks awesome but it looks a little awkward because the lack of time you spent double sleaving it. Whats the trigger for? I dont spend any time in the pneumatics section but i do know that ive never seen a trigger on one like the one you have here. Nice gun though man. Sorry for nitpicking.
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Unread postAuthor: Hubb » Sat Nov 17, 2007 4:29 am

wangpushups wrote:One suggestion, when you plan on double sleaving the pvc to make it look nicer, just mark it off with a sharpie and cut it, before glueing so it'll all fit perfectly...


When you mark it, cut it a little short, as the PVC probably will not slide completely into the coupling without the glue. Another option would be to hollow out the couplings and glue them over a solid piece of pipe. This way will add more strength and stability, but will be much more time consuming.
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