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274 - ATPL Question Bank in English - The mechanical shaft power of a piston engine, expressed in watts, can be calculated from torque T in newton metres and rotational speed n in revolutions per minute as:

Question 274 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot Licence

P = T × (2πn / 60)
P = pressure × lever arm
P = force × distance, without a time term
P = work × linear velocity

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