In flight mechanics, BSFC stands for Brake Specific Fuel Consumption. It is a measure of an engine’s fuel efficiency and represents the amount of fuel consumed per unit of power output (typically per unit of brake horsepower) produced by the engine. BSFC is commonly used to evaluate and compare the fuel efficiency of internal combustion engines, such as piston engines and gas turbine engines.
BSFC=FFR in (kw/hr)/Brake horse power (BHP) in kw
BSFC = Brake Specific Fuel Consumption (fuel consumption per unit of brake horsepower) Fuel Flow Rate (FFR) = The rate at which fuel is being consumed by the engine (in units like kg/hr or lb/hr) Brake Horsepower (BHP) = The power output of the engine measured at the engine’s crankshaft (in kilowatts for SI units or horsepower for Imperial units)