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barrel sealer ,probs?

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: qwerty » Sun Aug 16, 2009 5:24 am

Double post!
looks good you just need a higher pressure pilot.
what were you shooting?
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I visit occasionally to make unrelated posts.
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Unread postAuthor: Ragnarok » Sun Aug 16, 2009 5:34 am

inonickname wrote:And retains less energy, resulting in less stress on your cannon.

Less momentum.

The energy in a light piston will be essentially the same as in a heavier one.
Energy is force times distance - and given the forces will be (more or less*) the same, and the distance will be the same...

*Okay, the faster piston means you have to account for Bernoulli, but the effects of that are small at the speeds we're talking about.

Essentially, a piston in a given valve (at a given pressure) always attains the same energy when opening. The trick is to get as much velocity as you can for that energy, which is done by lowering the mass.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: FORE!!!! » Sun Aug 16, 2009 5:49 am

if u mean as in the projectile? it was a marble perfect fit in a 3/4 barrel.

6 grams it weighs
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