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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.
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 ...
Slotted flaps comprise several separate small airfoils which separate apart, hinge and even slide past each other when deployed. Such complex flap arrangements are found on many modern aircraft. [2] Large modern airliners make use of triple-slotted flaps to produce the massive lift required during takeoff.
The NTSB examined why the plane was unable to climb once it departed the runway. After conducting airplane performance studies, the NTSB determined that the events of Flight 1141 could only be explained by the aircraft attempting to take off without its flaps and slats extended to the proper take-off configuration.
The National Transportation Safety Board would later determine that the Flight 1141 crew did not properly configure the wing flaps and slats before trying to take off, which prevented the plane ...
Takeoff safety speed. The speed at which the aircraft may safely climb with one engine inoperative. [7] [8] [9] V 2 min: Minimum takeoff safety speed. [7] [8] [9] V 3: Flap retraction speed. [8] [9] V 4: Steady initial climb speed. The all engines operating take-off climb speed used to the point where acceleration to flap retraction speed is ...
The flap was added to prevent wing stall with an extreme attitude take-off with the tail dragging on the runway, a scenario that had caused two de Havilland Comet accidents. A preliminary flight test had been made on the Boeing 367-80 (the Dash 80) using a fixed flap and a skid on the after-body. [8]
Slats are high-lift devices typically used on aircraft intended to operate within a wide range of speeds. Trailing-edge flap systems running along the trailing edge of the wing are common on all aircraft. The position of the leading-edge slats on an airliner (Airbus A310-300). In this picture, the slats are drooped.