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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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so so
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just darn ugly
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just darn ugly
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Unread postAuthor: Hotwired » Tue May 08, 2007 9:35 pm

origin unknown wrote:
Hotwired wrote:Did you bore out the tees to get the barrel and chamber through them?

Yep, sure did.

What with?
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Unread postAuthor: Hawkeye » Tue May 08, 2007 9:41 pm

I use a chainsaw file to remove the stops in copper couplers. Quick and easy and the inside can be polished with a flap sander.
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Unread postAuthor: origin unknown » Tue May 08, 2007 9:51 pm

Hotwired wrote:
origin unknown wrote:
Hotwired wrote:Did you bore out the tees to get the barrel and chamber through them?

Yep, sure did.

What with?

A cylindrical file, and some ultra fine grit sandpaper to smooth it out.
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Unread postAuthor: Hotwired » Tue May 08, 2007 9:55 pm

o.0

That must've taken forever if they're made the same way as the one here are - a thicker middle section to block pipe going further in.

I took a couple of looks at how thick the middle copper section was and considered how long it would take to file away and cut it out instead :P
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Unread postAuthor: origin unknown » Tue May 08, 2007 9:59 pm

Hotwired wrote:I took a couple of looks at how thick the middle copper section was and considered how long it would take to file away and cut it out instead :P


I thought the exact opposite, thinking that it would be easier to file away rather than cut.
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Unread postAuthor: hi » Tue May 08, 2007 10:02 pm

how fast do you think this shoots? i know in the original post you said you didnt know, but could you give me a rough estimate?
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Unread postAuthor: origin unknown » Tue May 08, 2007 10:06 pm

Carrots dont weigh much. It probably shot the carrot at 140-250fps.
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Unread postAuthor: Novacastrian » Fri Dec 14, 2007 1:52 am

Just saw this cannon, very nice copper cannon :)
Is it limited to 200psi because of the sprinkler valve? One more thing, why no damage pics yet?
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Unread postAuthor: cwazy1 » Sat Dec 15, 2007 1:41 am

^^ im pretty sure its a qev.
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Unread postAuthor: Ragnarok » Sat Dec 15, 2007 1:53 am

Novacastrian wrote:Is it limited to 200psi because of the sprinkler valve?

Well, as cwazy has pointed out, it's a QEV.
Most QEV valves will happily go much higher than that, probably a limitation from the source is more likely.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: MrCrowley » Sat Dec 15, 2007 2:30 am

Those QEV's are only rated for 150psi, like a sprinkler I doubt they would go a whole lot higher past 200psi.
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Unread postAuthor: VH_man » Sat Dec 15, 2007 8:23 am

Havent people on this forum used QEV's past 250?

Im sure they can take more than 150, they are made out of solid aluminum!!!!!
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Unread postAuthor: Hotwired » Sat Dec 15, 2007 10:35 am

Its mainly to do with how tough the sealing material is.

The metal body is highly unlikely to fail but the piston/diaphragm in QEVs are made of rubber or rubbery plastic and thats what'll give way first.

Some which are sold at 150psi are used at 300psi.
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Unread postAuthor: nivekatoz » Sat Dec 15, 2007 2:47 pm

That thing is cool!!!!!!! You should find a barrel that is thicker,like a brass pipe nipple...You can find custom sizes on plumbingsupply.com or onlinemet***.com....I would give you the rest of the email address but I got in trouble last time I recommended a site....other wise its cool..I was thinking of making a gun using a qev,but I was not sure how they worked...I was thinking they worked like solenoid valves somewhat????
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Unread postAuthor: origin unknown » Sun Dec 16, 2007 5:35 pm

I accidentally ruined the QEV that I used in this cannon and bought a new QEV. Here is the link to the cannon I made with the new QEV: http://www.spudfiles.com/forums/wwr-winter-wonder-rifle-t9985.html
The new QEV is like the kind Hotwired was saying that can take 300psi(Ragnarok's HEAL cannon) even though its rated to 150psi.
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