What is leading edge flap?

A leading edge flap is a hinged panel that extends downwards and forwards from the leading edge of an aircraft wing. It is used to increase the lift coefficient of the wing at low speeds, thereby improving takeoff and landing performance. Leading edge flaps can take many forms, such as hinged or slotted flaps, and can be deployed to different angles depending on the aircraft's speed and operating conditions. They are typically powered by hydraulic or electric actuators, and are usually extended during takeoff and landing and retracted during cruise flight to minimize drag and fuel consumption. Leading edge flaps are an essential component of modern aircraft design, and are used on almost all commercial jetliners and many general aviation aircraft.