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Very good description, Brent.  A couple of corrections for what are probably
typos:  One pound force will accelerate one slug of mass at the rate of 1
foot/second^2.  Therefore one slug will exert approximately 32.2 pounds of
force on the earth (any mass when exposed to only gravitational force will
accelerate downward at 32.2 ft/sec^2).  Also, gravitational force is
inversely proportional to the square of the distance, not proportional.

I am still wondering how to estimate the static thrust of a propeller...

Gary Casey
ES project



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