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3/4" qev cannon ggdt

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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3/4" qev cannon ggdt

Unread postAuthor: ALIHISGREAT » Sun Sep 23, 2007 3:39 pm

could someone please put this throught ggdt i would like to know what length of chamber to put on my 3/4" paintball bolt action.

the barrel will be 1m of 3/4" pvc
the chamber will be 1.5" pvc (i'm guessing around 50cm)
it will use a blowgun piloted 3/4" qev
and there will be no dead space.

thanks.
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Unread postAuthor: veginator » Sun Sep 23, 2007 4:18 pm

:idea: How about giving more information like the length of your chamber and barrel.
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Unread postAuthor: ALIHISGREAT » Sun Sep 23, 2007 4:34 pm

i said that the barrel would be 1m long and the chamber around 50cm but its the chamber length i want to know. and i just realised that i left out that i will use it at 100psi.
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Unread postAuthor: iPaintball » Sun Sep 23, 2007 5:13 pm

Any reason you can't run it yourself? Anyway, what is your projectile's mass?
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Unread postAuthor: DYI » Sun Sep 23, 2007 5:16 pm

What gas are you using? How can you possibly eliminate all dead space? The projectile would have to be resting against the piston of the QEV.
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Unread postAuthor: ALIHISGREAT » Mon Sep 24, 2007 1:31 am

ok there will be practicaly no dead, space and the projectile mass will be around 3.2g and i will be using air.

i can't put i through myself because i don't have ggdt
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Unread postAuthor: jackssmirkingrevenge » Mon Sep 24, 2007 2:05 am

If noise and pumping isn't a problem and you want maximum power, go ahead and make it as long as the barrel. If not 30 to 50cm will suffice.
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Unread postAuthor: ALIHISGREAT » Mon Sep 24, 2007 11:13 am

yes but i want to know what velocity the cannon will shoot at aswell and how much using a bigger chamber will change that, eg a 50cm chamber compared to a 70cm chamber.
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