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Automatic Piston Gun

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Automatic Piston Gun

Unread postAuthor: Kobl » Thu Mar 22, 2007 5:17 pm

I have recently been looking at Marks full auto marble gun here. I recently began construction on my steel (black and gavy) bb gun and was wondering if his full auto system could be adapted for use on a homemade piston valve. The chamber is 1/2x12" with a barrel sealing tee valve with both copper and airsoft bb barrels.

Thoughts and help would be appreciated,

-Butt
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Unread postAuthor: jackssmirkingrevenge » Thu Mar 22, 2007 5:24 pm

Why not, after all the QEV is a piston valve anyway operating on exactly the same principles.
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Unread postAuthor: NeoSpud » Thu Mar 22, 2007 5:39 pm

Not to be a nitpick, but QEVs like the one on mark's gun is a diaphragm valve. ;)

Doesn't change the overall answer to your question though... you sure can use it
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Unread postAuthor: A-98 » Thu Mar 22, 2007 5:56 pm

im pretty sure QEV's are super light-weight piston valves.
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Unread postAuthor: NeoSpud » Thu Mar 22, 2007 7:26 pm

I'm pretty sure that I've taken enough of them apart to know that the vast majority of them use a diaphragm. :wink:
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Unread postAuthor: meatballs » Thu Mar 22, 2007 8:37 pm

doesn't matter which it uses, both do the same thing. as long as you are dumping pressure into the barrel it doesn't matter how. you could use a sprinkler valve or ball valve or whatever, and it would work, it would just be less powerful depending on the type of valve. but yes, a piston will definitely work.
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Unread postAuthor: jackssmirkingrevenge » Thu Mar 22, 2007 11:35 pm

NeoSpud wrote:Not to be a nitpick, but QEVs like the one on mark's gun is a diaphragm valve. ;)


Since some QEVs *are* co-axial piston valves and the piston/diaphragm valves operate on the same principle, I think all the evidence points to you in fact being a nitpick :roll:

:D :D :D
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Unread postAuthor: NeoSpud » Fri Mar 23, 2007 12:56 pm

Alright, I admit it, you've "outed" me! I am indeed a blasphemous nitpick!
:oops: :oops: :oops: :oops:

I blame my perfectionist parents; it isn't my fault!
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Unread postAuthor: jackssmirkingrevenge » Fri Mar 23, 2007 2:10 pm

yes yes, blame the parents... honestly, is there anyone left in the litigation loving US willing to take responsibility for their own actions?! :shock:

:wink:
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Unread postAuthor: NeoSpud » Fri Mar 23, 2007 2:14 pm

Well it's all those pompous Europeans' fault, with their philosophy and solipsim and gibberish nonsense!

Plus, passing the buck is a lot more fun. :wink:
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Unread postAuthor: jackssmirkingrevenge » Fri Mar 23, 2007 2:15 pm

I'll drink to that :D cheers!
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