Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
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altxf4
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Mon Jul 30, 2007 1:02 am
Here is my launcher set up for golf ball use for now. Got a tennis ball barrel in the works.
Got to paint , and set up a 3/4 Orbit or such as the pilot.
![Image](http://img183.imageshack.us/img183/826/img3027bv7.jpg)
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wannabie
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Mon Jul 30, 2007 1:20 am
looks nice. is that sprinkler valve 1.5" ? what size is the chamber?
you might want to paint it though...
In epoxy we trust.
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Pete Zaria
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Mon Jul 30, 2007 1:22 am
Good design, but a bit sloppy with the primer/glue. A paint job would make this cannon twice as good.
Looks to me like you used all pressure-rated parts (though I can't 100% tell from the pics...), good for you. Nice job sleeving the GB barrel, too.
Shortening the hose for your pilot valve might increase performance a bit - smaller pilot volume and all.
Nice project. I say paint it.
Peace,
Pete Zaria.
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mike1010
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Mon Jul 30, 2007 2:13 am
nice job i like the golf ball barrel and i like the look of the large sprinkler valve too
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spudthug
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Mon Jul 30, 2007 7:32 am
im thinking the 4 inch pipe isnt pressure rated...
sweet gun! is that a 2 inch sprinkler valve!
wow all you need is a new chamber (if its not pressure rated) and paint!
4" piston valved cannon-half done..( i spilt my cement...)
Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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spud yeti
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Mon Jul 30, 2007 8:24 am
Nice looking cannon (paint it) and shorten the pipe to the blowgun for better performance (less pilot volume)
really good quote/phrase here
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potatoflinger
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Mon Jul 30, 2007 8:40 am
Great looking gun, but how are you going to add a tennis ball barrel when the golf ball barrel is solvent welded to the air chamber?
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frankrede
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Mon Jul 30, 2007 3:54 pm
indeed.
I love the purple paint job:D
ha
I like the barrel support.
@potatoflinger
Thats a good question
Current project: Afghanistan deployment
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hkrivell
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Mon Jul 30, 2007 7:09 pm
Looks like that sprinkler valve was freshly dug out of the ground
![Laughing :lol:](./images/smilies/icon_lol.png)
. very nice though. I like the spacer you built between the barrel and chamber.
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altxf4
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Mon Jul 30, 2007 7:40 pm
52x4" chamber
Yeah yeah I know i need to paint it!! I just got it to the state of firing.
ALL Parts are pressure rated. Lowest PSI rated part is the chamber at 220Psi.
Solvent welds are sloppy because i wanted to make sure i had it good!
Valve is a 2" Ranbird PEB. (work for a landscape company and this was a retrofit for new irrigation, so the valve i have was tossed...I took it!)
I am finding that i do need to very much shorten the hose like you guys said. I am actually thinking i am going to use a 3/4 orbit and solenoid dump for the pilot on the 2".
Barrel support for the tennis ball barrel will use a block of wood or plastic, and some large hose clamps. Oh and the GB barrel is not welded to the valve...it is welded to a 2" MA.
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Pete Zaria
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Tue Jul 31, 2007 3:18 pm
e1337 wrote:4in sch 40 pipe is pressure rated for 220psi.
Incorrect, sorry.
Schedule (Sch 40, Sch 80, Sch 120) is only a wall thickness - NOT a pressure rating. There's Sch40 cellular core PVC, which will do very very nasty things above about 100psi.
To be pressure rated, it needs to have "NSF-PW" and a PSI rating printed on the side of the pipe.
I'm unsure about those fittings, too. They look pressure rated but I can't quite tell the socket depth.
Peace,
Pete Zaria.
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MisterSteve124
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Tue Jul 31, 2007 4:09 pm
yeah i agree the pipe doesn't look pressure rated. It has a flange on it like most sewer pipes do.
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Gepard
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Tue Jul 31, 2007 5:11 pm
If I ever go to the states - I'm gonna pic up some of this purple primer and PVC pipe and see just how hard it is to weld this stuff together. It surely can't be that difficult?! :lol
Well the socket depth on that pipe looks very similar in terms of ratios to the 110mm pipe I have that is pressure rated.....
Michael