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Double QEV 1"1/4 cannon

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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Double QEV 1"1/4 cannon

Unread postAuthor: Brice » Mon Mar 03, 2014 11:15 am

Hi,
I'm a new poster on spudfiles, to introduce myself a little bit : i'm from France( excuse all the mistakes, my English is far from perfect,) I'm also member of the french "patator forum"
I've been lurking on spudfiles for a long time, now i decide to post my latest cannon, made out of 1"1/4 galvanised pipe (the biggest diameter I was able to find, i would have prefered 2") with 2 QEVs : the 1"1"4 is homemade and a 3/8 indu one, piloted by a schrader valve.
the cannon is quite powerful at 20bar, with a 26mm barrel 1m long, using all kind of stuff as projectiles.
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I'm going to use a rod to trigger the valve and make a bullpup out of the gun, because it's a bit bulky
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Re: Double QEV 1"1/4 cannon

Unread postAuthor: jackssmirkingrevenge » Mon Mar 03, 2014 1:20 pm

Bienvenue au Spudfiles!

Tres beau travaille, that should be one hech of a powerhouse when finished :) I especially love your trigger system, schrader valve piloting for the win!
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Re: Double QEV 1"1/4 cannon

Unread postAuthor: mattyzip77 » Mon Mar 03, 2014 3:15 pm

Cool lookin cannon...looks powerful. What is your piston made out of??
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Re: Double QEV 1"1/4 cannon

Unread postAuthor: Brice » Mon Mar 03, 2014 3:39 pm

Compared to french cannons it's powerful, but compared to spudfiles' standards it's probably not so much ;)
the piston is currently made out of bolt, nuts, steel washers and a piece of plastic tubing, but my brother has access to machining facilities and could perhaps make a better one for me.
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