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Posted: Fri Nov 09, 2007 5:35 am
by jackssmirkingrevenge
There's a lot of flow rates to balance in this equation, getting it right could take some trial and error.

I used a similar system in my cartridge fed pneumatic prototype:

Image

Even though the filling hole was tiny, air still leaked through the barrel as the piston didn't reseal properly. I had to restrict the filling supply to tiny levels for the pilot volume to pressurise. A less tight fitting piston and larger chamber would probably have solved the problem, but being epoxy construction, not that easy to fiddle with the internals once you've built it.

Posted: Fri Nov 09, 2007 5:42 am
by Novacastrian
Damn that would be annoying you damned sadist Refers to current avatar. The fact you cannot fiddle would suck. I like your design very much and give kudos to anyone with the balls to build one :D

Posted: Fri Nov 09, 2007 5:46 am
by jackssmirkingrevenge
If you mean the above design, then I built it already :p check the link.

The avatar's from chopping block, dark humour but very funny :D

Posted: Fri Nov 09, 2007 6:00 am
by Novacastrian
jackssmirkingrevenge wrote:If you mean the above design, then I built it already :p check the link.

The avatar's from chopping block, dark humour but very funny :D
Rather i was wrong- that is funny stuff :D

Posted: Tue Nov 13, 2007 3:33 am
by Novacastrian
I wonder if 2600psi of dry nitrogen will help :twisted: :twisted: