My piston, hope it helps you!

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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PneuJose
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Hey guys, all i got to say is that i was searching my dads hardware store trying to find something that would fit on 1.5inch pipe for a 1.5n piston valve and i luckily found a Karman Rubber Vibro Insulator. Pics

ill post my gun after some shots ^^ to get damage pics.
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well the piston has a conical shape, i chose the conical one because its a little bit lighter than the cylindrical ones, the outer diameter is 1.5inch (exact!) and when it reaches 30psi starts to fill the chamber.
well the piston has a conical shape, i chose the conical one because its a little bit lighter than the cylindrical ones, the outer diameter is 1.5inch (exact!) and when it reaches 30psi starts to fill the chamber.
vibro insulator.gif (5.41 KiB) Viewed 2397 times
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hi
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this fits in the pipe, or it seals against the pipe. eather way, its a good find.
"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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PneuJose
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fits in the pipe, AND seal my barrel realy good cause its made of neoprene
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hi
Staff Sergeant 2
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how much do they cost? what is your barrel? is it commonly availible?
"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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PneuJose
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i dont know the cost....sorry i just took it was laying around. I dont think it would be commonly availble, i think u should order it from the internet. my barrel is 1'' pvc.
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rad14701
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I was thinking about trying a similar hardware store gadget for sealing... I had also considered using a tapered faucet washer for a 1/2 inch copper barrel...
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noname
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Looks like a plug for a chemistry flask, those would work too if you sealed the hole in the middle.
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pyromaniac
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it kinda looks like that with a sealed hole already.
:pottytrain3:
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