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Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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CpTn_lAw
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I made it, a 2m long pneumatic spudgun...the chamber is 4cm diameter, and 1m long, it is connected to a modified diaphragm valve, with one is connected to a 1m long barrel of 18mm diameter...i tested it at 7 bars...(100 psi) and i understand why i didn't get the power of all your guns, with my last spud...i was using a soda bottel, filled up to 50 psi......now, 100 psi is good, i'll stay at this pressure!!
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mouse kid
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Although copper pipes are easy to solder together and redily availible, I find that PVC pipes are the way to go. If a PVC cannon were to malfunction and explode right next to you, you will probubly not be to seriosly injured, however if a copper cannon were to exploded, it will throw shrapnel and most probubly kill you. :shock:
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beebs111
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no, pvc would throw shrapnel too, and if you make it correctly neither one would have a significant chance of exploding
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catguy801
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:evil: :twisted: :evil: :twisted: :evil: :twisted: :!: :?: :idea: :arrow: :wink: :cry: :oops: :P :x :shock: :? 8) :lol: :( :) :D :D :o all i can say is im from new zealznd and yhe cops here outlaw this stuff but that dont stop us from shooting there cars
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kris
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i wish i could build one of those but have u seen the price of copper thees days :shock: :shock: :(
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joannaardway
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As this topic has been brought up, Copper does not shatter, it tears.

If a copper cannon were to fail, you might get temporary hearing damage. If a PVC cannon failed, you'd get "pin-cushioned".
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POS
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nice to know, since I only have access to copper, no pressure rated PVC
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joannaardway
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You can get pipe benders for copper that work on that basic principle.

The benders only work because copper stretches instead of breaking.
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frankrede
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Nice cannon.
Btw, since you broke the window you should have told him and offered to replace it.
Copper beats pvc because well Its safer less brittle.
Current project: Afghanistan deployment
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spanerman
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it depends on the fitting also, compression fitting cant take as much as a good solde joint. 300 is the maximum id feel safe too
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DasGestapo
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that is wicked sick nasty!!!
you should turn some armor piercing dart thingies, and chrono the shots
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locksmith
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nice design you made sure it wasnt gonna leak :)
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PAspuder
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I bet that cost a fortune to make....but its a real piece!
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