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Large chamber spark

A place to ask general spud cannon related questions.
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Unread postAuthor: DYI » Tue Apr 15, 2008 7:26 pm

The math behind it:
Spark length is roughly inversely proportional to pressure, so:
8x = 8 times atmospheric pressure
If the spark is 1" at atmospheric pressure, it should be one eigth of that (1/8") at 8x. If the mix was 2x is would be 1/2", at 4x it would be 1/4", etc...
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