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2. High-lift device - Wikipedia

   en.wikipedia.org/wiki/High-lift_device

   High-lift devices compensate for this design trade-off by adding lift at takeoff and landing, reducing the speed and distance required to safely land the aircraft, and allowing the use of a more efficient wing in flight. The high-lift devices on the Boeing 747-400, for example, increase the wing area by 21% and increase the lift generated by 90 ...

3. Flight control surfaces - Wikipedia

   en.wikipedia.org/wiki/Flight_control_surfaces

   Flaps raise the maximum lift coefficient of the aircraft and therefore reduce its stalling speed. [5] They are used during low speed, high angle of attack flight including take-off and descent for landing. Some aircraft are equipped with "flaperons", which are more commonly called "inboard ailerons" [citation needed]. These devices function ...

4. Spoiler (aeronautics) - Wikipedia

   en.wikipedia.org/wiki/Spoiler_(aeronautics)

   In aeronautics, a spoiler (sometimes called a lift spoiler or lift dumper) is a device which increases the drag and decreases the lift of an airfoil in a controlled way. Most often, spoilers are hinged plates on the top surface of a wing that can be extended upward into the airflow to spoil the streamline flow.

5. Flap (aeronautics) - Wikipedia

   en.wikipedia.org/wiki/Flap_(aeronautics)

   A flap is a high-lift device used to reduce the stalling speed of an aircraft wing at a given weight. Flaps are usually mounted on the wing trailing edges of a fixed-wing aircraft . Flaps are used to reduce the take-off distance and the landing distance.

6. Circulation control wing - Wikipedia

   en.wikipedia.org/wiki/Circulation_control_wing

   A circulation control wing (CCW) is a form of high-lift device for use on the main wing of an aircraft to increase the maximum lift coefficient and reduce the stalling speed. CCW technology has been in the research and development phase for over sixty years. Blown flaps were an early example of CCW. [1]

7. Air brake (aeronautics) - Wikipedia

   en.wikipedia.org/wiki/Air_brake_(aeronautics)

   Often, characteristics of both spoilers and air brakes are desirable and are combined – most modern airliner jets feature combined spoiler and air brake controls. On landing, the deployment of these spoilers ("lift dumpers") causes a significant reduction in wing lift, so the weight of the aircraft is transferred from the wings to the undercarriage.