Originally Posted by
pokey9554
There has to be a formula for piston aircraft,
What, you don't have a BMEP guage in your airplane?
BHP = (BMEP*the length of piston stroke*area of cylinder cross section*RPM*number of cylinders)/792,000
Since the stroke, piston head area and number of cylinders remains the same for a given engine, they can be boiled down to a constant (K) for that engine and you get something like
BHP=BMEP*RPM/282 in a R2800.
All you folks got these fancy aviation degrees and they don't teach this?
. Actually, Charles Lindbergh was hired as a consultant for the Army Air Corp in 42 and taught pilots to extend the range of their fighters by pulling the rpm back.