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Lost: Beautiful copper gun

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Lost: Beautiful copper gun

Unread postAuthor: boyntonstu » Sat Jul 04, 2009 9:31 pm

I saw a copper airgun on the net that was stunning and I would like to find it again.

Description:

The gun used a commercial QEV.

Barrel over chamber design.

The barrel was not permanently attached to the chamber.

He cut the ID of copper T's and slid the barrel through the T's.

The T's were opened up on their sides so you could see the barrel going though them.

The T's fit onto the barrel by sliding them onto tubing affixed to the chamber.

The copper was not soldered, instead he use "just for copper" glue.

Highly polished gun.

A contest winner.

If I remember correctly, I saw it on the UK forum.

Do you know this gun?

I have spent hours looking.

BoyntonStu
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Unread postAuthor: twizi » Sat Jul 04, 2009 9:35 pm

i think it hotwired cannon it called copperhead prime
http://www.spudfiles.com/forums/viewtopic.php?t=6013&
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dont play with airsofter with 1000$ gun and play with a 5 dollar pair of glasses
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Unread postAuthor: spudtyrrant » Sat Jul 04, 2009 9:41 pm

no no i knew immediately what he was talking about and this is it http://www.spudfiles.com/forums/copperh ... ter,0.html i hope lol edit: dang you twizi you changed your comment lol
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Unread postAuthor: twizi » Sat Jul 04, 2009 9:46 pm

i new it but i had forgot the name it was a very sweet gun
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Unread postAuthor: boyntonstu » Sat Jul 04, 2009 9:52 pm

Thanks guys, this forum is great!

What is so interesting is that in just a few words, I could describe and you could recognize a single gun out of many.

Here it is:

http://www.uksgc.co.uk/forums/index.php ... Copperhead

She is a beautiful form an function design.

I wonder what its performance is.

BTW What pressure can a QEV diaphragm survive?

Thanks again,

Boyntonstu
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Unread postAuthor: twizi » Sat Jul 04, 2009 10:09 pm

600psi plus piston ones can digrams can survive 400psi maybe
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Unread postAuthor: pizlo » Sat Jul 04, 2009 11:43 pm

Piston QEV's can hold over 600 PSI, diaPHRAM QEVs might be able to hold 400 PSI. :roll:
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Unread postAuthor: inonickname » Sun Jul 05, 2009 12:04 am

Twizi, please stop changing your posts like that. Btb used unregged (around 800 psi) in one once.
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Unread postAuthor: Hotwired » Sun Jul 05, 2009 1:00 am

Wow.

The first two users to reply with the answer hadn't even joined the forum when my cannons thread last saw the light of day :P


As for performance, well that was slightly secondary to other things it had to do but it still has a predicted range of about 450m at the 240psi I have available (as if anyone is going to see a 14mm projectile come down that far away ^^) and can do terrible things to anything much you put in the way with very respectable sound effects. Big enough to be fun, small enough to live in the wardrobe :)


Unregulated co2 has been used by one of our French members too, I think his QEV piston blew apart under pressure when it was poked by the barrel. The metal casing was fine but the rubbery piston was under too much stress.


I've just noticed that (yet again) one of the cannon pictures has died, swear it was the same one whose hosting failed last time. I'll have to find the originals and rehost it.
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Unread postAuthor: pizlo » Sun Jul 05, 2009 1:15 am

Beautiful guns get remembered mate
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Unread postAuthor: Ragnarok » Sun Jul 05, 2009 7:04 am

boyntonstu wrote:What is so interesting is that in just a few words, I could describe and you could recognize a single gun out of many.

To be honest, it could probably have been worked out from one line amongst those:

He cut the ID of copper T's and slid the barrel through the T's.

It's not a common thing on cannons - so with the JFC comment (also uncommon), it'd be pretty much certain.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: al-xg » Sun Jul 05, 2009 10:42 am

Yep 850psi regulated High Pressure Air, and yes that is getting a little close to the limit for a 3/4" rubber QEV piston. After the bit of copper pipe got caught in the seat It leaked a bit of air, so although it shouldnt fail on its own, when using 850psi its probably worth being safe and using a stronger piston.

A metal piston could counter that problem, or one could just go with a smaller QEV.

:) And I'm not French, but yeah I've lived in France for quite while ;)
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