Please evaluate my canon.

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
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GreenLumos
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Mon Jan 30, 2012 2:45 pm

Barrel 2" = 90 cm
Chamber 4" = 50 cm
guy claims up to 25 bars pressure <-- i think he's an idiot
4mm thickness PVC equivalent of sch30 4" / sch40 2", no idea which type of PVC though
pipe has no writings to rate pressure..

typical spray and pray with end cap
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warhead052
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Mon Jan 30, 2012 2:46 pm

What's with all the tape? Please tell me that its not holding the cannon together. If it is, scrap it and rebuild. Other than the tape it looks pretty good.
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evanmcorleytv
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Mon Jan 30, 2012 5:57 pm

It looks fine!! But it will not hold 25 BAR.
Last edited by evanmcorleytv on Tue Jan 31, 2012 5:19 pm, edited 1 time in total.
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Daltonultra
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Mon Jan 30, 2012 11:55 pm

What in the names of the gods is that brown goop being used as glue?
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evanmcorleytv
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Tue Jan 31, 2012 5:20 pm

Daltonultra wrote:What in the names of the gods is that brown goop being used as glue?
Orange PVC cement.
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GreenLumos
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Wed Feb 01, 2012 7:28 am

Orange PVC Cement indeed....the tape is for incase it explodes, to reduce sharpnel.

it fired the cement gas...twice, but couldn't propagate a spark afterwards. back to the drawing board.
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