Which term denotes the power delivered at the propeller shaft of an aircraft engine?

Which term denotes the power delivered at the propeller shaft of an aircraft engine?

• A. Brake Horsepower
• B. Calibrated Airspeed
• C. Canard
• D. Autoration

Answer: (A)

The term describes the engine’s usable power as it drives the propeller. Brake horsepower is the power produced by the engine and measured at the output shaft with a brake dynamometer, representing the energy available to turn the propeller. In practice, the power that actually reaches the propeller shaft can be a bit lower due to losses in the drivetrain and propeller efficiency, but brake horsepower is the standard way to express the engine’s power at the shaft. The other options don’t relate to engine power: calibrated airspeed is a speed, a canard is a wing configuration, and autoration isn’t a standard aviation term.

The term describes the engine’s usable power as it drives the propeller. Brake horsepower is the power produced by the engine and measured at the output shaft with a brake dynamometer, representing the energy available to turn the propeller. In practice, the power that actually reaches the propeller shaft can be a bit lower due to losses in the drivetrain and propeller efficiency, but brake horsepower is the standard way to express the engine’s power at the shaft. The other options don’t relate to engine power: calibrated airspeed is a speed, a canard is a wing configuration, and autoration isn’t a standard aviation term.