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help needed with coaxial

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: MrCrowley » Fri Mar 07, 2008 9:11 pm

I had the exact same problem on my co-axial. I found some dowel, well a broomstick that fit perfect cut a bit off. Then with a dremel (you could use a file) made an o-ring groove.

Which was actually really easy with wood, it wasn't perfectly straight but it was pretty good. Then I chucked on an o-ring, lubed it up and it worked perfectly.

I think the problem was, although the first piston was a good fit, it wasn't a good enough fit to be piloted with such a small chamber.
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Unread postAuthor: Cosmic Muffin » Sun Mar 09, 2008 2:19 am

ok cheers mate ill give it a try i have an o-ring from the same bike pump i got the first piston from so ill use that
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Unread postAuthor: Procrastonator » Wed Mar 19, 2008 8:17 am

Just use a bigger pilot valve. i couldnt get mine to fire until i used a ball valve.
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