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Copper QEV cannon (caution picture heavy!)

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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Copper QEV cannon (caution picture heavy!)

Unread postAuthor: sharpshooter11000 » Wed Apr 04, 2012 6:02 am

Here's my copper QEV cannon, nothing new but I'm pleased with it.

Whole gun:

Image
link

Fill and fire setup:

Image
link

Chamber and barrel support

Image
link


Some specs:

Barrel: 1.2m long 22mm copper
Main valve: 1/2" QEV
Pilot: 1/2" ball valve
Fill valve: 1/4" quick connect, male
Chamber: Small oxygen tank (don't know what volume)

Damage pictures:

Image
link

3mm aluminium sheet, nearly penetrated

Image
link

1/2" MDF, straight through.

Anything else you want to know, just ask.
Hope you like it :wink:

Update:

This is the ammunition that I'm using at the moment

Image

The washers still need machined down to fit the barrel.

Image

Nail dart

Image

And another machined projectile.

Update:

Now added breech loading.

Open

Image

That one's blurry and it makes the breech look bent, it's not really.

Closed

Image
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Last edited by sharpshooter11000 on Thu Apr 05, 2012 12:07 pm, edited 11 times in total.
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Unread postAuthor: sharpshooter11000 » Wed Apr 04, 2012 6:04 am

Images aren't working. Anyone know what I've done wrong?
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Last edited by sharpshooter11000 on Wed Apr 04, 2012 6:07 am, edited 1 time in total.
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Unread postAuthor: Zeus » Wed Apr 04, 2012 6:06 am

Stuffed that one up.
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Last edited by Zeus on Wed Apr 04, 2012 6:07 am, edited 1 time in total.
/sarcasm, /hyperbole
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Unread postAuthor: Zeus » Wed Apr 04, 2012 6:07 am

Well, looks like the urls are too long, the text formatting stuffs them up. Try posting them as links or uploading them to the forum instead of using an image host.
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/sarcasm, /hyperbole
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Unread postAuthor: qwerty » Wed Apr 04, 2012 6:13 am

Make sure you're using the image option when copying and pasting rather than just the url option.
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I visit occasionally to make unrelated posts.
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Unread postAuthor: sharpshooter11000 » Wed Apr 04, 2012 6:41 am

There we go, pics working now.
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Unread postAuthor: wyz2285 » Wed Apr 04, 2012 7:11 am

God that air tank could be much more useful :roll:
You know there are a lot thing can be improved right :wink: ?
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Unread postAuthor: sharpshooter11000 » Wed Apr 04, 2012 7:14 am

Yeah, I was considering using the air tank for a hybrid, it's rated to 2800psi :twisted:
Constructive criticism is appreciated.
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Unread postAuthor: wyz2285 » Wed Apr 04, 2012 7:18 am

Don´t know what you want, but that tank is to big for the 1/2 qev.
also the ball valve pilot is a overkill for that qev, they can be pilot by a tyre valve you know.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: sharpshooter11000 » Wed Apr 04, 2012 7:22 am

The QEV empties it very fast, it makes a sharp crack when you fire it.
I had a quick connect and a ball valve on hand so I just got the reducer, I know it's a bit overkill but it was the cheapest option and it's pretty ergonomic too.
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Unread postAuthor: sharpshooter11000 » Wed Apr 04, 2012 12:52 pm

Update- ammunition added
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Unread postAuthor: Gun Freak » Wed Apr 04, 2012 4:08 pm

Those bolt washer bullets must tumble like hell :D

I like it ;)
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Unread postAuthor: sharpshooter11000 » Wed Apr 04, 2012 4:14 pm

I would have thought so too but they seem to fly pretty straight, that aluminium plate was shot at from an angle and if you look at the impact it's a perfect imprint of the nose. The nail darts fly dead straight though, great for distance shots :)

Thanks, that's a great compliment coming from you :D
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Unread postAuthor: DEATHSTAR » Wed Apr 04, 2012 5:24 pm

I like it.
Looks like a great "classic" shooter.

Personally, I like using wire-nuts (electrical connectors) for the base of ammo for copper stuff.

They can be used alone, or a bolt added, or even epoxied on end of an arrow. (Yellow or Red "Ideal" brand are my favorites)...

Working on a combustion ,that will be a gift for a buddy,
Has brass barrel that fits red wire-nut, chamber is a chrome/stainless steel drink mixer (for bars), it will have an oak stock, metering valve,
and be bolt-action loading (USING the brass mounts to construct the bolt)...
OH, that's what I forgot to mention: perhaps you could make this one bolt-action??? Just add a sleeve to fit over the barrel, and some sort of lock for the bolt (Pull back ,and press i nto a slot?)...

Cools spuddy, Thanks man!! 8)
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Unread postAuthor: sharpshooter11000 » Wed Apr 04, 2012 5:31 pm

Thanks DEATHSTAR, I was thinking of adding a bolt because I don't have a ramrod long enough for this barrel to use with projectiles with a really tight fit. I actually have some spare ABS lying around about the same ID as the OD of the barrel. Might do that tomorrow.
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