In the context of aircraft design, “Pin” typically refers to the input power or the power required by an aircraft’s propulsion system to generate thrust and overcome drag. It represents the power needed to operate the engine or propulsion system efficiently.The formula for input power (Pin) depends on the type of engine or propulsion system being used, as well as the specific operating conditions.
For example:For a piston engine:
- PÂ in is the input power in watts (W).
- F is the thrust produced by the engine in newtons (N).
- V is the velocity of the aircraft in meters per second (m/s).
- η (eta) is the efficiency of the engine, typically expressed as a decimal or percentage.