What does 'BHP' stand for in aviation engine ratings?

Brake Horsepower, or BHP, refers to the measurement of an engine's horsepower before losses like friction occur in the engine and other components. This metric provides an indication of the engine’s power output at the crankshaft, giving a realistic figure that manufacturers and pilots can use to understand the engine's performance capabilities.

In aviation, BHP is essential because it helps determine the aircraft's ability to perform maneuvers, maintain altitude, and manage various flight conditions. Knowing the BHP of the aircraft's engine aids in assessing the aircraft's performance, particularly during takeoff, climb, and other critical phases of flight. Understanding this term is vital for pilots when discussing engine performance and the aircraft’s capabilities.