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<< Lancair Builders' Mail List >>
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John,
Checking my very old Pratt & Whitney Handbook (June 1978), on page 137, the
thrust-HP conversion is as follows: one pound of jet thrust is equal to one
HP at 375 mph and under static conditions a conversion of 2.5 lbs of thrust
per one shaft HP is used. I have ommitted the formula which takes into
consideration a propeller efficiency of 80% in the conversion.
Walter Dodson
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