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Pneumatic Semi auto Golf ball cannon V3

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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Pneumatic Semi auto Golf ball cannon V3

Unread postAuthor: CannonCreations » Tue Sep 13, 2011 7:43 pm

This is my new design of the Semi auto golf ball cannon. The valve was designed with the help from a few people, especially Gun freak, so thanks for the help. It uses a 3" tank that is 2' long. it is threaded into the valve, so I can change it out for something smaller of larger if I want. It is using a 1.5" threaded barrel, so I can interchange them as I please. The valve is a 2" piston valve, with 1.5" porting. I have yet to shoot it, but as soon as I do, the footage will be up. and when I get some time it will get a much needed paint job. [youtube]http://www.youtube.com/watch?v=lxYHoq2bVhM[/youtube]
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Attachments
DSC00369compressed.jpg
Chamber and pilot valve
DSC00369compressed.jpg (27.64 KiB) Viewed 3018 times
DSC00381compressed.jpg
Piston housing, main valve
DSC00381compressed.jpg (26.38 KiB) Viewed 3018 times
DSC00384Compressed.jpg
Full picture of cannon
DSC00384Compressed.jpg (26.12 KiB) Viewed 3018 times
DSC00388compressed.jpg
Bumper, it has the center open, to allow a greater flow of air
DSC00388compressed.jpg (35.46 KiB) Viewed 2851 times
Last edited by CannonCreations on Sat Oct 05, 2013 9:10 pm, edited 3 times in total.

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Unread postAuthor: Gun Freak » Tue Sep 13, 2011 7:58 pm

Why is there primer on the outside of the male adapter :lol:

Erm... why did you use the 2"x1.5" reducer? It is supposed to be a bushing...

Looking good otherwise.
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Unread postAuthor: CannonCreations » Tue Sep 13, 2011 8:11 pm

yeah, I primed everything first, and realized I primed the outside as well, oh well it is getting painted anyways, and I couldn't find a bushing while shopping, so I went with this, and the reducer wont make any difference, since it is still pressure rated
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Unread postAuthor: mattyzip77 » Tue Sep 13, 2011 9:02 pm

Nice job man! In my opinion, primer stains are a good thing cuz you know you got a good seal. What are you using for a piston and bumper?? Lemme guess, bolt and washer piston and a half a tennis ball??? :lol: :lol: :lol:
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Unread postAuthor: Gun Freak » Tue Sep 13, 2011 9:12 pm

since it is still pressure rated

Going by the short socket depth, I'm gonna say the opposite.
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Unread postAuthor: CannonCreations » Tue Sep 13, 2011 10:45 pm

It is actually pressure rated, I made sure before I bought it, i know it may not look like it, but it is actually made for use in high pressures
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Unread postAuthor: MrCrowley » Tue Sep 13, 2011 10:46 pm

I don't mean to be anal but are you sure it says NSF-PW on the fitting? If it says Sch40, it doesn't necessarily mean it is pressure rated as Sch40 is not a pressure rating system.

Just checking, nice cannon by the way :wink:
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Unread postAuthor: CannonCreations » Wed Sep 14, 2011 7:00 am

Yes, I am 100% positive that the reducer in question is pressure rated, and yes it does say NSF-PW, and thanks, I am also a big fan of your work
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Unread postAuthor: streetfire » Wed Sep 14, 2011 8:16 am

nice gun wish we had pressure rated pvc in Europe would save me a lot of money on copper
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Unread postAuthor: CannonCreations » Wed Sep 14, 2011 8:57 am

Thanks, yeah copper is expensive, I would like to build a copper gun sometime, so that I can ramp up the pressure a bit more, but for now PVC is inexpensive and I am still learning, I think my next gun will either be an oxy/propane, or a coaxial, but not sure yet
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Unread postAuthor: Labtecpower » Wed Sep 14, 2011 10:01 am

nice gun wish we had pressure rated pvc in Europe would save me a lot of money on copper


Try "tuinland" :wink: they have PVC rated to 16 bar.
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Unread postAuthor: CannonCreations » Wed Sep 14, 2011 6:33 pm

No actually I am not using a tennis ball as a bumper, although i did think about i am actually using a rubber gasket, ill post it up top
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Unread postAuthor: Technician1002 » Wed Sep 14, 2011 6:49 pm

With care it is possible to prime the joint without having excess primer on the pipe. It does need you to mark the pipe where the primer is to stop and care applying it.
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Unread postAuthor: CannonCreations » Wed Sep 14, 2011 7:25 pm

I wasn't too worried about the primer since I am going to paint it anyway, and I wanted to make sure that it seals perfect, i didn't feel like risky safety for cosmetic appeal
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Unread postAuthor: pneumaticcannons » Thu Sep 15, 2011 12:30 pm

i wish we had pressure rated pvc over here in thailand... im misssing my co-ax i made over summer in the states :(
nice cannon btw and i wouldn't worry about the fittings. after all pvc cement does literally bond the two pieces together
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