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the "Victory" copper QEV rifle

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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pretty good
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just darn ugly
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Unread postAuthor: VH_man » Sun Dec 16, 2007 6:29 pm

Origin unknown, i beleive the reason your QEV failed is because it is a diaphram type.

the one you bought its a "poppet" type, wich uses a polycarbonate disk, aka why it can take so much pressure.

the ones from MCmaster should be able to hold 300 right?
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Unread postAuthor: origin unknown » Sun Dec 23, 2007 2:37 pm

This Is why it doesn't work now...
I took apart the QEV to sand down the sealing face so it would seal a little better at low pressures. I put it back together, but in the process I tightened the screws a little too tight and stripped the threads where the screws go in. Usually I overtighten alot of things for I am slightly compulsive. Now the air leaks out around the screws and the qev is totally useless unless I pour molten aluminum to fill the screw holes and then re-drill them. I don't have the equipment to this though...
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Unread postAuthor: dewey-1 » Sun Dec 23, 2007 3:25 pm

--
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Last edited by dewey-1 on Sun Apr 20, 2008 3:02 pm, edited 1 time in total.
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Unread postAuthor: unisonmind » Sun Dec 23, 2007 7:42 pm

Why don't you just drill and tap the holes one size bigger then the current bolt?
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Unread postAuthor: daberno123 » Sun Dec 23, 2007 10:01 pm

or if you don't think you'll ever want to take it apart again you could just fill it with epoxy
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Unread postAuthor: origin unknown » Wed Dec 26, 2007 6:00 pm

Unison: I would do that, but I cant use my Dad's drill press. I dont want to mess anything up either by using a normal drill.
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Unread postAuthor: stevenarroyo » Sat Aug 02, 2008 3:18 pm

why did you put a valve after the plowgun? :?:
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Unread postAuthor: Gippeto » Sat Aug 02, 2008 3:27 pm

The ball valve is acting as a "safety" .

This information was in the first paragraph.
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