What are leading-edge flaps primarily used for?

Leading-edge flaps are primarily designed to increase lift during critical phases of flight, particularly during takeoff and landing. By extending these flaps, the camber of the wing is increased, which enhances the airflow over the wing's upper surface. This alteration in wing shape allows for airflow to remain attached at higher angles of attack, thus preventing stall and enabling the aircraft to generate lift at slower speeds. This capability is crucial, as it allows pilots to operate safely at lower speeds without compromising the aircraft's lift characteristics.

Increasing lift is essential for various maneuvers, especially when an aircraft is climbing after takeoff or descending for an approach to land. The effectiveness of leading-edge flaps contributes significantly to the aircraft's performance, enabling smoother operations in low-speed conditions. This makes them a vital component in enhancing the lift characteristics of the wing, contributing to overall flight safety and efficiency.