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My New QEV Gun

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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Any Good?

Poll ended at Fri Sep 02, 2011 2:17 pm

Good
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Total votes : 2
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My New QEV Gun

Unread postAuthor: nathanhd123 » Tue Aug 23, 2011 2:17 pm

So after multiple attempts I have finally got my gun working. It was originally made to be a piston valve but I was desperate to get it working and so just used a 3/4" QEV. Its my first pneumatic so be nice.

Specs:


Chamber- Propane Torch Tank
Barrel- 15mm OD Copper Pipe
Main Valve- 3/4" QEV
Pilot Valve- 1/2" Ball Valve

Still needs a lot of work but I really wanted to shoot it.

Damage Pics will be coming tomorrow and will be shortening the barrel.

Image

Image

Image
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Last edited by nathanhd123 on Tue Aug 23, 2011 2:41 pm, edited 1 time in total.
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Unread postAuthor: mattyzip77 » Tue Aug 23, 2011 2:25 pm

Good job. I would add a blow gun to the end of the ball valve for easier piloting!! Also, what p s i have you brought it up to, and what are you using for ammo??? Definatley shorten that barrel, like in half!!
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Unread postAuthor: Lockednloaded » Tue Aug 23, 2011 2:36 pm

mattyzip77 wrote:Definatley shorten that barrel, like in half!!


Don't go chopping up a piece of copper without numbers to back it up. It may be that the last couple feet of yourbarrel only add a little bit extra speed, but if you're fine with the length then just leave tithe same.

Any details on the propane tank attachment?
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Unread postAuthor: nathanhd123 » Tue Aug 23, 2011 2:51 pm

Lockednloaded wrote:Any details on the propane tank attachment?


I just used an empty propane bottle a plumber gave me. It already had a 3/4" thread on it so I just drilled the valve out and screwed it on.

It said on the bottle it was rated to 30 bar.

I've taken it up to 80 psi so far. Shot a bit of wood at some plywood that was 10 metres away at an angle and it deflected and carried on for another 10 metres.
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Unread postAuthor: nathanhd123 » Fri Aug 26, 2011 9:17 am

whoops double post. Modderator please delete.
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