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My spare parts mini pneu.

Built a miniature 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 spare parts mini pneu.

Unread postAuthor: Daltonultra » Thu Nov 27, 2008 3:08 am

I found an old push-button valve and a copper toilet-fill tube in the garage, and figured, WTH, why not? I ran up and bought a close nipple and a compression fitting, slapped an old schraeder valve in it, and screwed the whole thing together.
Then I shot myself in the hand with a paperwad at 300psi and spent the next five minutes clutching my hand and crying/cursing. I haven't done anything that stupid in years. Now I've got a nasty little 1mm blood blister in the middle of my left palm.

Anyway, pics of cannon and damage.

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Sewing needle through the edge of a penny.
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Unread postAuthor: Demon » Thu Nov 27, 2008 9:27 am

What the heck is that valve?

This is a very nice spare parts cannon and the idea of using the pump hose as an air tank is very practical.

Very powerful :shock:
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Unread postAuthor: jackssmirkingrevenge » Thu Nov 27, 2008 9:51 am

Nicely done, a bit of work could make it into a neat little pistol.

Oh, and:

Then I shot myself in the hand with a paperwad at 300psi and spent the next five minutes clutching my hand and crying/cursing. I haven't done anything that stupid in years.


Classic spudding mistake, *never* underestimate the power of your launcher. It's almost on par with "looking down the barrel in case of a misfire" :roll: :D
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Unread postAuthor: Gippeto » Thu Nov 27, 2008 10:29 am

"Then I shot myself in the hand " :lol:

" I haven't done anything that stupid in years." (STILL :lol: )

Very good timing and delivery. :D

Pretty neat! A spitball gun an "roids". :)
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Unread postAuthor: ALIHISGREAT » Thu Nov 27, 2008 12:04 pm

thats nifty, i wonder what kind of flow a push button valve has? would it be suitable for piloting a smallish QEV
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Unread postAuthor: jrrdw » Thu Nov 27, 2008 12:13 pm

Dam nice! How many pumps to go through the penny?
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Unread postAuthor: Daltonultra » Thu Nov 27, 2008 2:46 pm

Demon wrote:What the heck is that valve?


I have no idea what the valve is. I bought it last year when I was trying to build my big sprinkler valve cannon. I did get it off McMasterCarr, but that's all I can tell you.

EDIT, just searched McMasterCarr, and it is a push button valve, cat# 6790T42


ALIHISGREAT wrote:thats nifty, i wonder what kind of flow a push button valve has? would it be suitable for piloting a smallish QEV


I'd say it would pop a 3/4" QEV pretty easily. It might even be big enough for a 2". I'll do some experimenting to see when I redo the big one again.

jrrdw wrote:Dam nice! How many pumps to go through the penny?

7 or 8 gets it up to 300psi. I find myself wishing I'd bought the 260psi floor pump, though. This thing will never fill my 1/2" cannon's tank.
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