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My First Spud 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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My First Spud Gun

Unread postAuthor: huskeyeskimo » Wed Mar 28, 2007 7:02 pm

This is my first attempt at building a spud gun. I decided to go with a pneumatic gun due to the consistency factor they seem to have over combustions. I made the chamber of this gun out of 1 1/2" PVC piping. It consists of 4 couplings, 2 elbows, and 1 end cap. I am big into aesthetics and personally like the flush chamber style much more (Plus I believe it adds some safety value to it). The valve is a modded 1" Rainbird sprinkler valve w/ blowgun actuation. The barrel is 2' of 3/4"CPVC piping with a 3/4" coupling on the end. I have yet to include breech loading on it simply because Im not sure on the best way to do so with keeping it looking ok. I've only tested it up to 50 PSI since im not too sure how high it is safe to take one of this size. But the test fires more than pleased me. You can barely see the PB as it leaves. If anyone has any suggestions please let me know. Hope yall enjoy. Btw I appologize for the logo in the bottom left corner. Couldnt find a way to get my pics from BMP to an uploadable format.
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unitil2.jpg
Close-up of the valve
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untitled2.jpg
Pic of whole Gun
untitled2.jpg (26.03 KiB) Viewed 2120 times

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Unread postAuthor: noname » Wed Mar 28, 2007 7:04 pm

Unusual design, love the flush coupler look. Bet it's a fun plinker. :D
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Unread postAuthor: chaos » Wed Mar 28, 2007 7:08 pm

not bad at all shoot some lead sinkers see how they go.
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Unread postAuthor: locksmith » Wed Mar 28, 2007 8:06 pm

one thought on your blow gun trigger.I had the exact same one and it didnt dump as fast as a different one i had around so you may want to see about getting a different one to see if you gain some power i know i did.very noticable differents.
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Unread postAuthor: huskeyeskimo » Wed Mar 28, 2007 8:10 pm

I appreciate the tip Locksmith, I got a few more laying around my shop so I will swap em out and see if I notice a difference as well.

Didn't even think about lead sinkers chaos. Are they a good fit for 3/4" CPVC?
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Unread postAuthor: PVC Arsenal 17 » Wed Mar 28, 2007 8:14 pm

Paintballs sure are. There's probably some sinkers that'll fit.

I really like your gun though. Excellent job making the whole thing flush. It looks better that way.
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Unread postAuthor: Mitchza89 » Wed Mar 28, 2007 11:05 pm

Great looking 1st gun (2 thumbs up).
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Unread postAuthor: experament-u2 » Thu Mar 29, 2007 1:48 am

that is a lovely gun it looks rely nice
the chamber looks sweet flush to

im looking forwards to ur next gun
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Unread postAuthor: MrCrowley » Thu Mar 29, 2007 2:15 am

huskeyeskimo wrote:I appreciate the tip Locksmith, I got a few more laying around my shop so I will swap em out and see if I notice a difference as well.

Didn't even think about lead sinkers chaos. Are they a good fit for 3/4" CPVC?


Yeah you can use lead sinkers....I was shooting through 1/2" MDF board with them....it rips the MDF up :twisted: Ill try and find out what size I used for my 3/4" barrel.
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Unread postAuthor: jackssmirkingrevenge » Thu Mar 29, 2007 2:51 am

Nice design, expecially for a first effort :) With regards to ammunition if you can get some hands on 12 gauge shotgun sabots they fit pretty well in a 3/4" barrel and only weigh about 3 grams so you can launch practically anything that fits.

12 gram CO2 capsules cut in half with a bit of lead melted into the closed end for weight also make great slugs :D
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Unread postAuthor: huskeyeskimo » Thu Mar 29, 2007 8:41 am

Yeah ill probly head out later with an extra peice of pipe to see if I cant find any good ammunition. I like the idea of shooting things that actually have mass to them.

How much PSI would it be safe to take this up to. All the fittings are NSF-PW.
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Unread postAuthor: jackssmirkingrevenge » Thu Mar 29, 2007 9:51 am

I'd say it could easily take whatever your compressor can put out unless you have one of those 3,500 psi scuba tank pumps :shock:
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Unread postAuthor: joannaardway » Thu Mar 29, 2007 10:51 am

120 psi would be safe, 150 would be probably be fine as well. Wouldn't take it too much further though.
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Unread postAuthor: huskeyeskimo » Thu Mar 29, 2007 11:18 am

Yeah my compressor only goes up to 125, and I wouldnt imagine putting 3500psi into anything unless I was in a bunker so I could watch the show. :D
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Unread postAuthor: jackssmirkingrevenge » Thu Mar 29, 2007 11:26 am

I put that much pressure into my precharged pneumatics on a regular basis :wink:
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