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The Last 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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Unread postAuthor: JJ pyro » Tue Nov 20, 2007 11:08 am

Sweet gun you got there mate. 8) I am working on something like that too :P
But i am not as experienced in spudgun building. I would like to know how to build a good working silencer. Can you explain??
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Custom Blowgun??

Unread postAuthor: seudo411 » Tue Nov 20, 2007 2:49 pm

I just realized something, Bit late though but is that a custom blowgun or is one that has been sawed in half. and once again it is beautiful and scary in its simplicity.

P.S If you would still like input on your piston woes I have an idea you might want to look at.
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Unread postAuthor: Mitchza89 » Wed Nov 21, 2007 1:46 am

Cheers for the comment JJ Pryo. I've never built a silencer to be honest so I wouldn't have a clue. Just do a bit of loooking on here. There is some good info.

Seudo411, it's a store bought blowgun but I heavily modded it to make it comfier and have a hell of alot more flow.
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Unread postAuthor: JJ pyro » Wed Nov 21, 2007 1:47 pm

Thanks anyway Mitcha :) . But i have one more question, Does any of you have an idea on how to fit a copper tube in to a ball tap??
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Unread postAuthor: seudo411 » Wed Nov 21, 2007 3:54 pm

JJ Pyro - You can find a suitable coupling that has threading on one end and a horse tail coupling on the other side that has a external diameter that is less than the internal diameter of said tube and fill it with epoxy.

Mitcha
- If your piston is perfectly centered you can use a solid epoxy piston, and on the sealing side, using a router make a circular groove that is at least
10mm wide, and 5mm deep, then fill this groove with silicone sealant, remember to sand the barrel smooth and even. This results in a minimalist style sealing face that is very effective in theory, In Practice it might differ.
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Unread postAuthor: Mitchza89 » Wed Nov 21, 2007 6:29 pm

Thats a good idea mate. I'll have to give that a try.

Sorry JJ, I havn't worked with copper yet but there are alot of spudders on here who are more then welcome to lend some wisdom :D
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Unread postAuthor: JJ pyro » Thu Nov 22, 2007 8:42 am

Thanks seudo. :o
Ill give it a try:P
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Unread postAuthor: JJ pyro » Thu Nov 22, 2007 1:47 pm

Im trying to build a pressure container for my copper gun. does anyone of you have an idea on how to assemble this???? :lol:
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Unread postAuthor: ghostman01 » Fri Nov 23, 2007 9:18 am

hi what kind of actuator are you using please
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Unread postAuthor: seudo411 » Fri Nov 23, 2007 11:13 am

JJ Pyro What valve are you going to be using, If you are going to be using a coaxial setup i suggest a steel pipe threaded at both ends that is twice your barrel diameter and no less than half the length. I unfortunately have no experience with anything other than metal. I think thats the little voice in my head that keeps me alive, I do suggest you try and keep the amount of parts to your pressure vessel as low as possible, try a fire extinguisher, why?? It has a high pressure rating, and precut threads. :D
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Unread postAuthor: JJ pyro » Fri Nov 23, 2007 11:27 am

Thanks for the ideas guys, Ill try and use them. :o
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Unread postAuthor: Mitchza89 » Sun Nov 25, 2007 3:58 am

Well lads, I just had a good shoot off with the gun this weekend with my mate. at 150psi, I can easily shoot a plastic bb through one side and just about out the other side of a deoderant can at 4m. It makes short work of cans and milk bottles too :D.
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Unread postAuthor: jackssmirkingrevenge » Sun Nov 25, 2007 5:25 am

Mitchza89 wrote:Well lads, I just had a good shoot off with the gun this weekend with my mate. at 150psi, I can easily shoot a plastic bb through one side and just about out the other side of a deoderant can at 4m


Very impressive for a plastic BB, good on ya :)
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Unread postAuthor: Mitchza89 » Sun Nov 25, 2007 5:30 am

Thanks alot mate :D. Hmmm I wonder if the "Poor man's Chrono" idea works for 8mm bb's. I reckon it won't be spot on but pretty close. My GGDT results for this gun at 150psi are

Muzzle Energy: 6.5ft*lb
Muzzle Velocity: 869fps

I reckon thats a bit too optomistic though :?.
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Unread postAuthor: wangpushups » Sun Nov 25, 2007 10:41 am

How far can you shoot it?
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