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Coaxial. 'nuff said. Warning: High resolution pics

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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Coaxial. 'nuff said. Warning: High resolution pics

Unread postAuthor: Intel Xeon » Sat Jul 21, 2007 4:59 pm

This is my first coaxial. I made it, reduced the chamber size twice, extended the barrel once, and replaced half of the union. The forward bushing is messed up, yes, I know. It will be replaced.

Total Length: 5'5" or so.
Chamber: About 2' of 1 1/2"
Barrel: 4 1/2' of 1/2
Valve: Diaphragm housed in a 1 1/2" union
Diaphragm: 1/8" gasket sheet
Exhaust: 1/2 Ball Valve


Pic 1
The Cannon

Pic 2
The valve setup

Pic 3
My ingenious barrel center-er
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Unread postAuthor: turbohacker » Sat Jul 21, 2007 5:48 pm

This is a Co-Axial?
It looks much more like a diaphram gun from the side. Nevertheless it is a very nice gun. You dont see many diaphram guns.

It needs a great paintjob and maybe a handle and it'll be ready to rob a bank :lol:
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<-- This is not a cat avatar

If it walks like a dog, sratches like a dog, and barks like a dog, than its probobly a...-TURTLE, it's a TURTLE!!! Cant you see?!!!

frankrede wrote:Great googlay mooglay!
Thats a beast!
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Unread postAuthor: FeLeX » Sat Jul 21, 2007 6:34 pm

Hey Nice man. I am building a gun just like that. What did you use for a diaphragm?
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Unread postAuthor: MrCrowley » Sat Jul 21, 2007 6:47 pm

turbohacker wrote:This is a Co-Axial?
It looks much more like a diaphram gun from the side. Nevertheless it is a very nice gun. You dont see many diaphram guns.

It needs a great paintjob and maybe a handle and it'll be ready to rob a bank :lol:


A co-axial can use a diaphragm valve.

Nice gun btw.
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Unread postAuthor: Intel Xeon » Sat Jul 21, 2007 7:10 pm

For the diaphragm, look in the post. Thank you for the compliments.
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Unread postAuthor: noname » Sat Jul 21, 2007 7:34 pm

Why the union? It's just another $10 and it's unnecessary. Cool gun though.
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Unread postAuthor: Intel Xeon » Sat Jul 21, 2007 8:08 pm

What? the union was like USD$2.50 at lowes. I'm wondering where people are getting this $10 crap
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Unread postAuthor: frankrede » Sat Jul 21, 2007 11:26 pm

It doesn't even cost 10$ for a 2" sch 80 at my lowes
Nice coax
Whats the pvc after the ball valve exhaust for?

@Turbohacker
How long have you been here?Come on all of your posts I see are usually of wrong information.
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Current project: Afghanistan deployment
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Unread postAuthor: spud yeti » Sun Jul 22, 2007 2:05 am

Why the union? It's just another $10 and it's unnecessary. Cool gun though

The union holds the diaphram in place and seals it, so how can it be unnecessary!

This is a Co-Axial?

As MrCrowley said, it can have a diaphram or piston. As far as my knowledge tells me, a co axial just means the barrel is housed in the chamber.
Very Nice cannon though, well done.
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really good quote/phrase here
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Unread postAuthor: Intel Xeon » Sun Jul 22, 2007 5:30 am

Plus, the union lets me "Breech Load". Just unscrew the back and shove your projectile in the barrel.
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Unread postAuthor: spud yeti » Sun Jul 22, 2007 6:32 am

Good point, never thought of that. How fast can you reload it then? :lol:
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really good quote/phrase here
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Unread postAuthor: Intel Xeon » Sun Jul 22, 2007 6:49 am

Takes maybe 7 seconds. It is needed because I don't have anything slim and long enough to muzzle load a 1/2" barrel
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Unread postAuthor: spud yeti » Sun Jul 22, 2007 6:54 am

OK, thats pretty flipping good! And muzzle loading a 5ft gets old fast :? What do you use as a projectile for it?
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really good quote/phrase here
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Unread postAuthor: hi » Sun Jul 22, 2007 1:01 pm

that looks slightly familiar, i wonder where ive seen it....

anway, nice job on it.

and by the way, i used a union on mine because the only diaphragm i had was too thin and would have been simply sucked into the barrel.
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"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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Unread postAuthor: Intel Xeon » Sun Jul 22, 2007 3:21 pm

yes, :P my valve was inspired by yours. I just used a different exhaust, size, and diaphragm.
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