Quote:
Originally Posted by Spartan151
Here's the setup. I took a two foot long, 3-inch PVC pipe, added a 3in. coupler, put a 3-to-1 1/2 reducer, then a 1 1/2 to 1 reducer, to fit the Rainbird Sprinkler Valve. The Sprinkler Valve electrical system I'll explain later.
keep in mind that the PVC IS NOT USED FOR AIR STORAGE AT ANY POINT ON THE GUN! the only time it comes in contact with air is when the gun fires, and even then it's triple-reinforced in the joint sections, and I made sure to take an extra careful amount of time while assembling it.
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The PVC barrel will see a shock load that is equal to the pressure in the tanks. This shock load will be applied in under 1ms. It is this shock load that will sunder PVC as the PVC cannot expand fast enough when the shock load is applied (cannon is fired).
Again, I highly recommend not using PVC for ANY pneumatic device ... especially ones that will sustain shock loads such as air cannons.