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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: frankrede » Mon Jun 30, 2008 1:38 am

I had some 1 1/2" but its all sdr-21:/
which is great if you are dealing with golfballs, but...I'm not.
And I figure with a coaxial the extra barrel clearance should be fine.

and I'm running the blowgun the correct way
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Unread postAuthor: Pyro Ninja » Tue Jul 01, 2008 1:59 am

How much hose do you plan on using.
Looks like a blowgun may not be able to pilot it your valve (based on previous experience)
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Unread postAuthor: frankrede » Tue Jul 01, 2008 2:17 am

Pyro Ninja wrote:How much hose do you plan on using.
Looks like a blowgun may not be able to pilot it your valve (based on previous experience)
Interesting, I completely overlooked that, perhaps I need to completely redo my designs.
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Unread postAuthor: Pyro Ninja » Wed Jul 02, 2008 2:04 am

frankrede wrote:Interesting, I completely overlooked that, perhaps I need to completely redo my designs.

Yes, you may have to do so....

I had a 20mm Tee with 15cm diameter piston and about, probably double the hose length in your design, and it just barely actuated the valve after the chamber was "empty".
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Unread postAuthor: frankrede » Wed Jul 02, 2008 7:29 pm

Pyro Ninja wrote:
frankrede wrote:Interesting, I completely overlooked that, perhaps I need to completely redo my designs.

Yes, you may have to do so....

I had a 20mm Tee with 15cm diameter piston and about, probably double the hose length in your design, and it just barely actuated the valve after the chamber was "empty".

Ok guys I am having a major problem
My cannon is nearly complete, but for some reason it doesn't fire correctly, my piston seals and doesn't leak, it is actuated by a 3/4" sprinkler valve but when I pilot the cannon most of the time except for once all of the air went out my pilot.
The piston is a wooden dowel with a few layers of tape around it and it is a really nice fit and slides smoothly.
Is my pilot too strong? or what?
I really am horrible when it comes to piston cannons...
heres a picture of the pilot assembly
if more pictures are needed of the internals or piston I can get those
<a href="http://s30.photobucket.com/albums/c325/redensekjf/?action=view&current=1215044445.jpg" target="_blank"><img src="http://i30.photobucket.com/albums/c325/redensekjf/1215044445.jpg" border="0" alt="Photobucket"></a>
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Unread postAuthor: KRN » Thu Jul 10, 2008 5:43 pm

frankrede, you are awesome:)
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Unread postAuthor: SpudFarm » Thu Jul 10, 2008 5:45 pm

love is in the air :)

and i have to say i am agree with Karen
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