the "Victory" copper QEV rifle

[Hotwired]

Did you bore out the tees to get the barrel and chamber through them?

Yep, sure did.

What with?

[Hawkeye]

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.

[origin unknown]

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.

[Hotwired]

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

[origin unknown]

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

I thought the exact opposite, thinking that it would be easier to file away rather than cut.

[hi]

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?

[origin unknown]

Carrots dont weigh much. It probably shot the carrot at 140-250fps.

[Novacastrian]

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?

[cwazy1]

^^ im pretty sure its a qev.

[Ragnarok]

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.

[MrCrowley]

Those QEV's are only rated for 150psi, like a sprinkler I doubt they would go a whole lot higher past 200psi.

[VH_man]

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!!!!!

[Hotwired]

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.

[nivekatoz]

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????

[origin unknown]

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-win ... 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.