What is the primary function of leading edge slats?

Leading edge slats primarily serve to increase wing lift and decrease stall speed, particularly during low-speed flight conditions, such as takeoff and landing. By extending the wing's camber and effectively increasing the wing area at the leading edge, slats delay airflow separation over the wing surface. This enhancement allows the wing to maintain smooth airflow at higher angles of attack, which is critical during slow flight scenarios.

As a result, leading edge slats contribute to improved aerodynamic performance and safety by enabling the aircraft to operate at lower speeds without stalling. This capability is especially useful for large commercial aircraft and helps pilots operate the aircraft more safely during critical phases of flight.