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What happens when trailing edge flaps are extended?
Flaps are a high lift device consisting of a hinged panel or panels mounted on the trailing edge of the wing. When extended, they increase the camber and, in most cases, the chord and surface area of the wing resulting in an increase of both lift and drag and a reduction of the stall speed.
Do flaps change the critical angle of attack?
Flaps reduce the critical angle of attack even as they increase the maximum coefficient of lift at a given angle of attack.
What is the function of the trailing edge flaps?
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.
How do trailing edge wing flaps increase lift?
Pivoting the leading edge of the slat and the trailing edge of the flap downward increases the effective camber of the airfoil, which increases the lift. In addition, the large aft-projected area of the flap increases the drag of the aircraft. This helps the airplane slow down for landing.
How does lowering trailing edge flaps affect critical?
It all depends on the shape of the airfoil and the kind of trailing edge flap. Generally, however, lowering the trailing edge flap to some extent allows the airplane to maintain a higher angle of attack before stalling, so the effect is to raise the critical angle of attack.
How does a flap affect the angle of attack?
Both right and both wrong, both over simplifications based on unknown airfoils, and so on. Real aerodynamics is complicated and 3 dimensional. Flaps usually increase the critical angle of attack a few degrees, but they also increase the effective angle of attack for a given pitch.
How does a flap affect the camber and AOA?
The camber increases because flaps change the shape of the wing, adding more curvature. This produces more lift. The AOA increases because the effective chord line, which runs from the leading edge of the wing to the trailing edge of the flap, pivots up. This increases the angle between the chord line and the relative wind (the AOA).
How does a flap affect the pitch of an aircraft?
Flaps usually increase the critical angle of attack a few degrees, but they also increase the effective angle of attack for a given pitch. So the net result is that the pitch of the aircraft will be similar at stall with or without trailing edge flaps, but the true AoA will increase. share|improve this answer.