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shoulder fired co-axial cannon+video

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: pneumaticcannons » Thu Aug 25, 2011 5:09 am

jhalek90 wrote:I approve of this cannon. it would look SICK painted flat green.
Normally i'm not a fan of electrically actuated sprinkler valve... but i LOVE the trigger that you have.

Just to point out... It looks like ALL the fitting are DWV. (except the front bushing.)

I would advise on your next build, yo make sure you get pressure rated fittings... they have a much deeper socket. the couplers are about 2x as long.

I personally, WOULD shoot this at 50psi.... but if you ever hear even a tiny leak from any of the fittings... set it down very carefully and GET the #%@& away from it.

when you build your next one, use pressure rated fitting, and crank her up to 150 psi. (also, use a 1.5'' chamber with a 1/2 barrel... 2'' is nice, but overkill. you would notice very little performance decrease.)

ya i recently did some math and realized that the B:C ratio is like 8 to 1 lol. Ill be replacing her barrel next summer and It still has some good power even at 50 psi. And are u sure ALL the fittings are DWV?
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Unread postAuthor: Crna Legija » Thu Aug 25, 2011 5:27 am

pneumaticcannons wrote:And are u sure ALL the fittings are DWV?


they sure do look like it, the front reducing bushing might be rated.
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Unread postAuthor: pneumaticcannons » Fri Sep 09, 2011 10:03 pm

they sure do look like it, the front reducing bushing might be rated.
So now the only part that I thought was not rated is now possibly rated and the rest not??? lol ill just keep firing this thing at 50-60 psi for the sake of safety
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Unread postAuthor: pneumaticcannons » Mon Aug 06, 2012 6:27 pm

Update: Summer of 2012

I once again upgraded my big plunker this summer while in the US of A's, swapping out the 1/2" barrel for a more practical 1" one. I also redid the piston and bumber for an overall performance increase(somewhat) The piston unfortunately reseals when firing lighter projectiles, hence the somewhat. No pictures because while on my arse, I forgot that I was not only into building, but also documenting the construction of launchers. :D
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Last edited by jrrdw on Thu Nov 07, 2013 3:05 pm, edited 1 time in total.
Reason: Fixed video.
ramicaza <- My Youtube Channel
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Unread postAuthor: mattyzip77 » Mon Aug 06, 2012 6:38 pm

Very cool cannon and video. I would tell you to mod the valve but I am sure you already know that trick and like it the way it is. Good work dude.. :wink:
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