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QEV airsoft 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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Is it cool?

no way!
1
4%
it's alright
5
22%
it's decent
7
30%
It's awesome!
10
43%
 
Total votes : 23
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Unread postAuthor: thespeedycicada » Sat Nov 03, 2007 10:09 pm

Nice! looks like alot of fun any idea of fps yet? I really need to get around to building a bb gun.
  • 0

current projects: co-axial piston valve.Status DONE!
S.P.E.C.S update mk 1 construction begining in febuary all the maths for it are done plans are drawn up and parts are listed.
NEXT project:auto piston valve.
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Unread postAuthor: blind909 » Tue Nov 13, 2007 11:33 pm

he already said about 500 fps.
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Unread postAuthor: mopherman » Wed Nov 21, 2007 6:22 pm

I know this is somat old, but its one the front page so ill go ahead and ask. how much do you recon this thing weighs? How long is your chamber?
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Unread postAuthor: JDP12 » Wed Nov 21, 2007 6:37 pm

wow very nice! I like it!

I don't think you should shorten the chamber either- it looks very cool
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Unread postAuthor: potatoflinger » Wed Nov 21, 2007 7:16 pm

mopherman wrote:I know this is somat old, but its one the front page so ill go ahead and ask. how much do you recon this thing weighs? How long is your chamber?

I would say it weighs around ten pounds (just a guess). The total chamber length is probably 4-5 feet, but I recently added a ball valve to the chamber so that it cuts the volume in half when the valve is closed, and allows for slightly more powerful shots when it is open. (I'll try to add some pictures) I also recently added a marble barrel for it, and it has quite a bit of power. I'll try to get another video up soon, but my bike pump hose split, and my compressor only goes up to 100 psi, so the shots won't be too powerful.

Edit: I took a picture of the ball valve, here it is:
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Attachments
VID00090_0001.jpg
The ball valve that shuts off half of the chamber
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Unread postAuthor: VH_man » Wed Nov 21, 2007 8:00 pm

Looks nice. What kind of FPS do you get with marbles?

and you should make a metal chamber, im pretty sure your QEV can take about 300 PSI.
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Unread postAuthor: potatoflinger » Wed Nov 21, 2007 8:52 pm

VH_man wrote:Looks nice. What kind of FPS do you get with marbles?

and you should make a metal chamber, im pretty sure your QEV can take about 300 PSI.

The chamber is 3/4" black iron (similar to galvanized steel), but I'm not sure how fast it can shoot marbles.
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Unread postAuthor: VH_man » Wed Nov 21, 2007 8:57 pm

oh, wow. way for me to look. it looked like painted elbows on white PVC.......

MY BAD
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Unread postAuthor: potatoflinger » Wed Nov 21, 2007 9:03 pm

VH_man wrote:oh, wow. way for me to look. it looked like painted elbows on white PVC.......

MY BAD

You must've seen the teflon tape.
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