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  • foobarFred commented on Meico's instructable Self Contained Pneumatic T-Shirt Cannon1 year ago
    Self Contained Pneumatic T-Shirt Cannon

    PVC was never intended to be used for compressed air, mainly because of the dangers involved in something like this. I built a similar PVC cannon for launching water balloons, not knowing this. We had a lot of fun, shooting one balloon well over 400 ft!It failed after only an hour at around 60-80 PSI while the compressor was refilling the chamber. It was rated for a much higher pressure (180 PSI, I think) and we had previously achieved around 105 PSI. I used a "T" shaped air chamber and when it failed one branch of the "T" broke off (not cleanly at the seam, but with a jagged edge around the seam) and shot through the air like a missile. Had I been in front of it, it would have seriously injured me. And, I was lucky, as it's far more typical for something like this t...

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    PVC was never intended to be used for compressed air, mainly because of the dangers involved in something like this. I built a similar PVC cannon for launching water balloons, not knowing this. We had a lot of fun, shooting one balloon well over 400 ft!It failed after only an hour at around 60-80 PSI while the compressor was refilling the chamber. It was rated for a much higher pressure (180 PSI, I think) and we had previously achieved around 105 PSI. I used a "T" shaped air chamber and when it failed one branch of the "T" broke off (not cleanly at the seam, but with a jagged edge around the seam) and shot through the air like a missile. Had I been in front of it, it would have seriously injured me. And, I was lucky, as it's far more typical for something like this to shatter when it fails sending shrapnel in every direction.While it's a fun project, I highly recommend using a metal pipe that's intended to contain pressurized air, rather than PVC.

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