What does BHP stand for in relation to engine performance?

BHP stands for Brake Horse Power, which is a measure of an engine's power output before any losses, such as friction or other factors, are accounted for. This term is commonly used in the automotive and aviation industries to quantify the actual performance capacity of an engine under normal operating conditions.

Measuring Brake Horse Power allows for a more standardized comparison of engine performance because it provides a clear indication of the power that can be harnessed for work. The "brake" refers to the use of a dynamometer to measure the power output of the engine as it operates, effectively representing the engine’s capability without including losses from accessories, exhaust systems, or other components that could affect the net power available for driving or propulsion.

Understanding BHP is vital for pilots and aircraft operators, as it relates directly to the engine's performance characteristics, affecting factors like takeoff distance, climb rate, and overall aircraft efficiency.