In flight mechanics, the lift coefficient (CL) in level flight refers to the dimensionless parameter that quantifies the efficiency of an aircraft’s wings in generating lift to support the aircraft’s weight during steady level flight. It is a fundamental aerodynamic parameter used to describe and analyze the lift-producing capabilities of an aircraft.
- CL is the lift coefficient (dimensionless).
- W is the weight of the aircraft (in newtons or pounds-force).
- ρ is the air density (in kg/m³ or slugs/ft³) at the current altitude.
- V is the true airspeed of the aircraft (in m/s or ft/s).
- S is the wing area of the aircraft (in square meters or square feet).