Circumference = Pi X Diameter- - - -27" height X Pi (3.14) = 84.78 inches. Round off to 85 inches. 85 inches = 7.08 feet. 746 turns/mile.

It should be simple to plug un the figures from there with any of the online formulas.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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