Thrust Specific Fuel Consumption (TSFC) is a key indicator of the efficiency of an aircraft engine. It tells you how much fuel an engine burns to produce a specific amount of thrust over time. A lower TSFC means higher efficiency.
TSFC = Fuel Flow Rate / Thrust
TSFC is critical when comparing the performance of different engines or optimizing engine designs. It helps engineers determine the most fuel-efficient configurations for aircraft, particularly during cruise flight.