A place for general potato gun questions and discussions.
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MrCrowley
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Thu Nov 13, 2008 7:35 pm
_Fnord wrote:
Yes. I think it was MrCrowley who had a 45* elbow blow up for no apparent reason. There have been various other failures here and there, but most of them can be attributed to recoil stresses on barrel-to-chamber fittings. This is the only case I can think of where it wasn't the cause.
Yup it 'twas I. I know I glued and primed it correctly so I lay blame on rapid (de)compression (stress on the fittings) and possbily bad glue. It was getting close to it's use-by date but was still the same thickness (hadn't dried out from leaving it exposed).
It has made me a little more careful, I always wear safety glasses when firing and filling the cannon.
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Biopyro
- Corporal 2
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- Location: UK
Thu Nov 20, 2008 1:26 pm
Who would have guessed there was a test of durability from impact all along. Weird no-one had ever found this.
Test video
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety. -Benjamin Franklin
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Radiation
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Thu Nov 20, 2008 2:38 pm
MrCrowley the elbow blow out, was it on a pneumatic or combustion? From what I'm gathering from this thread it is the constant pressure of a pneumatic that seems to be the main source of blowouts. A standard properly built combustion gun does not seem to be a culprit in these blowouts, though I am not saying any design is 100% safe from failure.
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MrCrowley
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- Joined: Fri Jun 23, 2006 10:42 pm
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Thu Nov 20, 2008 2:56 pm
Radiation wrote:MrCrowley the elbow blow out, was it on a pneumatic or combustion? From what I'm gathering from this thread it is the constant pressure of a pneumatic that seems to be the main source of blowouts. A standard properly built combustion gun does not seem to be a culprit in these blowouts, though I am not saying any design is 100% safe from failure.
Pneumatic, around 110PSI.
I would think if you built your combustion properly, it should never blow up. The firing rate is probably slower then that of a pneumatic and the pressure below 100psi (on an advanced combustion).
