Spudtech Forum

Gun is almost done...
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Author:  Spudtech [ Wed Jul 02, 2003 7:00 am ]
Post subject:  Gun is almost done...

Originaly posted by SwampFox,
This is how I have my gun set up...
Two 4"x2' tanks (better long then short!) one on either side.
The right sided tank has the shrader vavle tee and the gauge tee...
then it does a 90 degree into a tee which leads to the barrel and another 90 degree which leads to the relief valve (125 PSI) and a on/off vavle...then into the left tank..

The barrel total is 73 inches (6' 3")X 1.5"...the valve on the barrel is a 1" sprinkler and is going to be pnuematicly edited...

anyway, I know it's not exactly the most efficient design (the angled pieces) and I know the tanks are quite large (600 cu in.), but i achieved my 4:1 ratio...but anybody notice any big problems i might have? (everything is pressure rated and I have teflon tape for the metal threads)

Author:  Spudtech [ Wed Jul 02, 2003 8:00 am ]
Post subject:  600 cu. in.

Originaly posted by mta,
I'd advise you to use a ball valve to allow the effective removal of one of the 4" tanks from the system.

Plugging in optimistic figures for your valve, you'll get 338 fps with a 75 gram projectile with both tanks at 100 psi, and 331 fps using only one tank. You could save 300 cu. in. of air and the penalty would only be 7 fps.

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