9 Foot Long Pneumatic Cannon

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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msg72391
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I have a question about ball valves: does anyone know a way to attach a lever to it to make it easier to open? If so please reply.
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boilingleadbath
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beebs, PVC1 is mearly the specific type of PVC used (there is also a type 2, which is more impact resistant).
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Benny
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i have taken dwv to 1oo psi, its compleatly safe, i mean a soda bottle can take over 161 psi! and its like a 2oeth of a milimetre thick.
also get a nice spring to open the ball valve.
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msg72391
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How could i position the spring to make it effective?
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