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burst disk c:b

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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burst disk c:b

Unread postAuthor: jon_89 » Sun Oct 05, 2008 12:21 am

What would be a good c:b for a pnuematic burst disk?
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Unread postAuthor: Hubb » Sun Oct 05, 2008 1:10 am

Whatever you can manage.
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Unread postAuthor: jon_89 » Sun Oct 05, 2008 1:12 am

so low or high?
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Unread postAuthor: starman » Sun Oct 05, 2008 1:16 am

The same general cannon c:b guidelines would be in effect with or without a burst disk. A burst disk is going to simply act as a very fast valve.

There's nothing magic about a burst disk that would impart power to a projectile that wasn't already present in the chamber in the first place. It just presents that power to the projectile in a very fast way.
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Unread postAuthor: Lentamentalisk » Sun Oct 05, 2008 1:50 am

Use GGDT to figure it out for your cannon and ammo combo. There is not magic C:B ratio like everyone is always trying to find, just in general something somewhere i the general vicinity of approximately 1:1 is in the right ball park.
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Re: burst disk c:b

Unread postAuthor: jackssmirkingrevenge » Sun Oct 05, 2008 3:25 am

jon_89 wrote:What would be a good c:b for a pnuematic burst disk?


As with any pneumatic, more volume = more power but to a point, use GGDT to help you out. If you want a launcher that doesn't take much effort to pump up and is relatively quiet, a low chamber:barrel ratio (we're talking 1:4) will suit you fine.
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Unread postAuthor: psycix » Mon Oct 06, 2008 10:27 am

If you...

want the gun to be silent: low
have an air compressor: high
have to hand-pump it:low
want a maximum power: high
want good portability: small gun, thus low

It depends if you want to take the gun out for recreational purposes or if you want it to take it to the max for penetration experiments and velocity records.
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