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SpudFiles Forum Index » Pneumatic Cannon Showcase » Copperhead Prime

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Copperhead Prime

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Hotwired

Posted: 02/21/2007 16:33 PM Post subject:

UK Spudgunner
Major General

Joined: 13 Oct 2006
Posts: 1799
3884.01 Spud Bux

Thank you

I'm glad its inspired so many spudgun builders, at the last count I know of 4 builds which are variants or just using parts of its design Very Happy

killagorrila99

Posted: 02/23/2007 2:41 AM Post subject:

Captain Obvious
Brigadier General

Joined: 25 Jul 2006
Posts: 1103
152.60 Spud Bux

YAY! I really love this gun. Mind if I use parts of your design for the new hunting rifle?

Hotwired

Posted: 02/23/2007 5:37 AM Post subject:

UK Spudgunner
Major General

Joined: 13 Oct 2006
Posts: 1799
3884.01 Spud Bux

Not at all Smile

Anything to make cannon designs more varied Wink

dippydodo03

Posted: 02/24/2007 16:55 PM Post subject:

Staff Sergeant

Joined: 23 Jan 2007
Posts: 103
130.96 Spud Bux

WOW!!! Incedible gun.

iPaintball

Posted: 03/06/2007 17:30 PM Post subject:

Colonel

Joined: 04 Mar 2007
Posts: 712
968.81 Spud Bux

i love you. seriously, this is probaly the best copper cannon i have ever seen. props man, props.

spudthug

Posted: 03/06/2007 21:07 PM Post subject:

Gangster Kitten
Brigadier General

Joined: 26 Feb 2007
Posts: 974
609.33 Spud Bux

wow i cant believe you won a comp and got everthing you needed...that gun is the best gun i have ever seen...how does the barrel not come off when you shoot???

EDIT: yea!!!!!!100 posts!!!!!!lol mmkay im done

Hotwired

Posted: 03/07/2007 2:42 AM Post subject:

UK Spudgunner
Major General

Joined: 13 Oct 2006
Posts: 1799
3884.01 Spud Bux

The compression fitting I use for breech loading off the QEV clamps the barrel very tightly just screwed down by hand. Its held sufficiently to lift the cannon by the barrel.

The barrel tees even though they're not fixed to anything, keep the barrel lined up with the rest of the cannon.

Edit: 345 posts! Very Happy

joannaardway

Posted: 03/07/2007 3:03 AM Post subject:

Brigadier General

Joined: 09 Oct 2006
Posts: 961
115.90 Spud Bux

Yey! 360 posts!

@hotwired: That is a slightly odd way of doing it though. Is there any reason you did it like that?

Hotwired

Posted: 03/07/2007 3:23 AM Post subject:

UK Spudgunner
Major General

Joined: 13 Oct 2006
Posts: 1799
3884.01 Spud Bux

It was the way I connected the barrel on my very first cannon.

Since it worked and I saw no problems with it I carried it over to this design Smile

The olive on the pipe has to be squashed slightly but not so it distorts the pipe, just so it has a reasonable grip. After that just screwing on the compression nut to hand tightness will hold it all quite well - I can't even twist the barrel in the fitting once its screwed down.

Since I make a point of keeping the barrel walls smooth and not using overtight ammo, very little forward force is actually put on the barrel and certainly not enough to yank it out of the compression fitting.

If I deliberately jammed the barrel or closed off the tip to a projectile then its possible that it could pull the barrel out with the sudden forward force directly applied to it. But I'd never risk it Wink

pyrodimitri

Posted: 03/15/2007 11:48 AM Post subject:

Private

Joined: 06 Dec 2006
Posts: 8
15.02 Spud Bux

One of the coolest guns I've seen. Very clean look.

whittingstall

Posted: 03/19/2007 7:09 AM Post subject:

Private

Joined: 08 Mar 2007
Posts: 14
43.29 Spud Bux

This is an amazing gun. I love the full copper look, and much props on the design making it look cool and keeping it simple.

FeLeX

Posted: 03/19/2007 17:21 PM Post subject:

Captain

Joined: 10 Mar 2007
Posts: 308
254.45 Spud Bux

Oh my GOD that is such a bad a$$ gun!! I think that is the best spud gun I have ever seen.
How powerfull it it? You got a chrony to test it?

PS.
Could you please tell me where can I buy that kind of QEV, Ive looked on mcmaster.com and I couldnt find it.

Hotwired

Posted: 03/20/2007 6:39 AM Post subject:

UK Spudgunner
Major General

Joined: 13 Oct 2006
Posts: 1799
3884.01 Spud Bux

No, no chrony but it's dam powerful Smile

I'm currently using lead slugs and they can mushroom out on concrete @ 20m and still bounce off with enough force to bury themselves in the ground Razz

I'm searching for someone in my town whos got a chronograph but its a bit difficult. I'm going to try a couple of rifle clubs next.

McMaster doesn't stock suitable QEVs in my opinion... I had a look at them once and they're all weird.

This is where mine was from: http://www.airlines-pneumatics.co.uk/webcat/Detprod.asp?ProductCode=S0 70139

But it's a UK company and I'm guessing you're US based. I'll have a look around for you.

jackssmirkingrevenge

Posted: 03/20/2007 6:53 AM Post subject:

space monkey
<b>Donating Member</b>

Joined: 15 Mar 2007
Posts: 6974
11108.12 Spud Bux

Hotwired wrote:

I'm searching for someone in my town whos got a chronograph but its a bit difficult. I'm going to try a couple of rifle clubs next.

They might not take too kindly to your design. A barreled launcher that's capable of exceeding 12 ft/lbs of muzzle energy is technically a firearm that requires a FAC. Posession of an illegal firearm technically means an automatic 5 year jail term.

Hotwired

Posted: 03/20/2007 7:21 AM Post subject:

UK Spudgunner
Major General

Joined: 13 Oct 2006
Posts: 1799
3884.01 Spud Bux

I'm not likely to go up to the door with it and I do know enough gun law to not let too many people know of it.

There only seems to be one club anyway and its a university place which would probably mean too many questions.

I may just try an improvised chrony.

Nuff about that though. It's not high on my list of things to do.

After scouring the web I've found comparable QEV's for sale in the US:

http://airinc.thomasnet.com/viewitems/specialty-valves-acc-/super-quic k-exhaust-valves (seems to be different models for different sizes)

http://airinc.thomasnet.com/viewitems/specialty-valves-acc-/pneutrol-q uick-exhaust-valves (different manufacturer, same site)

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