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My old copper spudgun

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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My old copper spudgun

Unread postAuthor: Slugfoot » Thu May 03, 2007 11:09 pm

This is my old copper spudgun which I built last year.
It's been up on UKSGC for a while now but I've only just got around to posting it here (sorry).

The barrel is 15mm and is 42" from muzzle to safety valve. The chamber is 22mm.



Image

There seems to be a tradition of copper spudguns here in the UK and this spudgun follows suit.
Image

It has a home-made, barrel sealing piston valve made from a bolt, some washers and a couple of rubber tap washers. The small spring allows it to be pressurised through the schrader on the end of the chamber. As you can see, it's all got a bit shitty in there over time.
Image

Any comments, queries, praise or criticism welcome.

Hopefully, I will be getting some more materials / parts in the near future and I intend to build more using some QEV's I have on order.
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Unread postAuthor: hi » Thu May 03, 2007 11:25 pm

hey, its the original UK long rifle! just kidding, its a really nice gun.

the only thing i would have done diffeerently is i would have turned the piston valve 90 degrees and used it as a stock, that would have made it more manureable and you wouldnt need as many fittings.

its a really nice gun and im building on kinda like it, but not as long. very very nice.
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Unread postAuthor: Slugfoot » Thu May 03, 2007 11:36 pm

hey, its the original UK long rifle! just kidding, its a really nice gun.


Yeah, my old fella (who isn't with us any more) christened it the "buffalo gun".

the only thing i would have done diffeerently is i would have turned the piston valve 90 degrees and used it as a stock, that would have made it more manureable and you wouldnt need as many fittings


This was my first spudgun (but not my last) and to be honest it didn't really occur to me since I didn't have the experience. Since then I've been looking and learned several things from many different examples. Hopefully, my next ones will be a step forward in terms of design and maybe power.
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Last edited by Slugfoot on Fri May 04, 2007 10:01 am, edited 1 time in total.

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Unread postAuthor: mega_swordman » Fri May 04, 2007 5:17 am

Well, it certainly is long. Looks kinda funky to hold with the rest of the gun so far forward. I don't know, maybe I'm just overreacting and/or really bad at guestimating lengths relative to people.
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Unread postAuthor: Slugfoot » Fri May 04, 2007 7:08 am

Yeah, I'm going to try to go with more compact designs in future.
It's still quite light despite the overall length so it's no problem to hold and aim. I suppose it may be more suited for a bipod type setup.
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Unread postAuthor: Juicey » Fri May 04, 2007 9:16 am

For being your first spudgun. I must say very nice job on the barrel sealing piston valve. Great looking gun.
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Unread postAuthor: Slugfoot » Fri May 04, 2007 9:58 am

^ Thanks.
In retrospect, I should have done the valve in 28mm instead of 22mm. The reason for this is that I would have been able to use a bigger piston face and opening time would have improved. Having said that, the one on it works quite well. And I learned quite a lot from building it.:)
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Unread postAuthor: simo » Mon Jun 04, 2007 2:58 am

nice gun how did you connect the pipes together,
did you weld them together or what
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Unread postAuthor: Hotwired » Mon Jun 04, 2007 3:16 am

He soldered them together using plain endfeed fittings.
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Unread postAuthor: SPUDMASTER91 » Mon Jun 04, 2007 9:42 pm

what kind of ammo does it use and also it would be nice to see some damage pics :)
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Re: My old copper spudgun

Unread postAuthor: Slugfoot » Sun Oct 26, 2014 10:49 am

Bump. :)

Hello again.
It's strange to be posting here again after all this time. I was prompted to visit back again after coming across a few (potential) airgun parts I came across during a clear out and got all nostalgic about my old copper spudgun (whereabouts now unknown).
Anyway, what I came across was a selection of qev's (M5, 1/8", 1/4", 1/2" and a 3/4"), an assortment of brass fittings, a presure gauge (300 psi) and some other stuff like schrader valves, etc. In fact, most of the parts needed to build a nice 3/4" bullpup (and more). So, I thought I'd start slowly gathering what further parts I need to complete one (I'm kinda poor these days) and ordered one of these for use as a trigger:-
https://www.machinemart.co.uk/shop/prod ... t-blow-gun
It's supposed to fit behind whatever air tool you're using so you don't have to go switching tools to blow off your work area, or whatever.
I was attracted by the neat push-button design and that wheel on the side that presumably switches between the airtool line (refill valve) and the blowgun nozzle. This could be a handy feature in that (if I'm right) it would act as a safety and also negate the use of a ball valve to stop the gadget going off when removing the pump from the schrader valve...(I kinda have a variation of Hotwired's excellent 'Copperhead Prime' design/configuration in mind here....

SPUDMASTER91 wrote:what kind of ammo does it use and also it would be nice to see some damage pics :)

For what it's worth after all this time... :lol:
Ammo ranged from spud pellets to 1/2" paintballs at really low pressures. I recall that the paintballs swerved quite alarmingly due too spin picked up in the barrel. At higher pressures (generally 150 - 200psi), paintballs would just turn to mush. Ball bearings (.38 with a wad worked well) batteries with tape around, etc..
Sadly, no damage pics. There aren't even any pics of the above airgun that I know of. :)
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