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The True Power Of A Piston Valve

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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Unread postAuthor: MrCrowley » Tue Oct 23, 2007 1:11 am

YOU HAVE GOT TO BE F*CKING ME|!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I am so going to Ozzy!!!!

He had a holiday in NZ once, but dont think he has ever played here.

I want to go to maiden but they blew NZ off AGAIN! So f*ck them. I'm a bigger Ozzy fan.

What show you going to? I'll probably go to the Sydney one, my dad is working there for a few months.
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Unread postAuthor: watto » Tue Oct 23, 2007 2:22 am

MrCrowley wrote:By the way the 1/4 of the barrels diameter = piston travel only applies to co-axials according to clide, he said give it a bit more in barrel sealers.


Youve seen a diagram of my current project right? Is mine a barrel sealer or a co-axial? Because the piston seals the barrel but this cannon http://www.spudfiles.com/forums/coaxial-piston-cannon-t10400.html is almost identical to mine right down to the hansen fitting, cept mine has a 50mm chamber and its called a co-axial. And by 'give it a bit more' what are you talking 3/8 of the barrels diameter? (BTW mine is working great now with the new valve, just gotta iron out a few kinks and give the glue an extra maybe 48hours to be safe)


MrCrowley wrote:I am so going to Ozzy!!!!

Asin 'Aussie'? I knew you'd come around to the brilliance of Australia.:lol:
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Last edited by watto on Tue Oct 23, 2007 3:46 am, edited 1 time in total.
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Unread postAuthor: MrCrowley » Tue Oct 23, 2007 2:26 am

When I said barrel sealer I meant a typical barrel sealer in a tee with a chamber below the barrel, I knew someone would kick up as fuss about that :wink:

And by 'give it a bit more' I mean with ym 2" piston valve, it has a 40mm seat, so I gave it a 1" travel, which is plenty.

Glad the piston finally worked out for you, great feeling when it finally does work properly.

Haha yeah, well where Ozzy goes I go, not really but he aint gonna come here and i'm pretty much a hard out fan. (520 songs of his)
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Unread postAuthor: Gepard » Tue Oct 23, 2007 3:44 am

ammosmoke wrote:<snip>@Gepard Increased shock isn't such a great idea, as it weakens the gun for the next time you use it. Although, what you are describing probably isn' that big a deal.
<snip>


I disagree I think for testing you should create as much as stress as possible short of damaging it. Everytime you fire you put the plastic under extreme shock and so testing should reflect this.
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Unread postAuthor: watto » Tue Oct 23, 2007 3:49 am

Gepard wrote:I disagree I think for testing you should create as much as stress as possible short of damaging it. Everytime you fire you put the plastic under extreme shock and so testing should reflect this.


That doesn't make any sense to me, but what do I know :lol:
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Unread postAuthor: Gepard » Tue Oct 23, 2007 4:08 am

:lol:

When you test something you want to test it above what you use it at regularly.

A normal SG, when fired has a massive amount of shock on it.

So when you test it you should put it under alot of shock as if your firing it. (I'm talking about chamber testing here)

But only enough shock to test it fully and not break it.
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