Thrust Specific Fuel Consumption (TSFC) measures an aircraft engine’s fuel efficiency, representing the amount of fuel consumed per unit of thrust. A lower TSFC indicates better fuel efficiency, enabling longer flights or extended operation on a set fuel quantity. The formula for TSFC in flight mechanics is given by:
Where:
- is the Thrust Specific Fuel Consumption,
- is the rate of fuel flow (mass flow rate of fuel), and
- is the thrust generated by the aircraft’s engine.