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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 ...
Wing flaps and slats are currently used during landing on almost all aircraft and on takeoff by larger jets. While flaps and slats are effective in increasing lift, they do so at a high cost of drag. [3] The benefit of the circulation control wing is that no extra drag is created and the lift coefficient is greatly increased.
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. Flaps also cause an increase in drag so they are retracted when not needed.
They are used during takeoff and landing and while performing low-speed maneuvers which may take the aircraft close to a stall. Slats are retracted in normal flight to minimize drag . Slats are high-lift devices typically used on aircraft intended to operate within a wide range of speeds.
Model of the English Electric P.10 high altitude Mach 3 reconnaissance aircraft proposal with a wing that would be used for both lift and propulsion: two turbojets would have been positioned in the wing roots for take-off (and landing) and to attain a speed where a bank of ramjets, fed by the slot intakes in the leading edge of the wings, would ...
Powered-lift. A heavier-than-air aircraft capable of vertical take-off, vertical landing, and low-speed flight, which depends principally on engine-driven lift devices or engine thrust for the lift during these flight regimes and on non-rotating aerofoil(s) for lift during horizontal flight. —
Fixed-wing aircraft designed for high-speed operation (such as commercial jet aircraft) have difficulty generating enough lift at the low speeds encountered during takeoff. These are therefore fitted with high-lift devices , often including slats and usually flaps , which increase the camber and often area of the wing, making it more effective ...
The charts show the added lift benefit produced by ground effect. [3] For fan and jet-powered vertical take-off and landing (VTOL) aircraft, ground effect when hovering can cause suckdown and fountain lift on the airframe and loss in hovering thrust if the engine sucks in its own exhaust gas, which is known as hot gas ingestion (HGI). [4] [5]