DONE 3B Airplane Systems - Wings, Flaps, Leading Edge Devices and Spoilers Flashcards
- AIRPLANE ONLY*
2. Describe a typical wing flap system.
The wing flap system consists of “single-slot” type wing flaps. They are extended and retracted by a wing flap switch lever to flap settings of 10, 20, and 30 degrees. A 15-amp push-to-reset circuit breaker protects the wing flap system circuit.
- AIRPLANE ONLY*
1. What are flaps, and what is their function? (FAA-H-8083-25)
The wing flaps are movable panels on the inboard trailing edges of the wings. They are hinged so they may be extended downward into the flow of air beneath the wings to increase both lift and drag. Their purpose is to permit a slower airspeed and a steeper angle of descent during a landing approach. In some cases, they may also be used to shorten the takeoff distance.
- AIRPLANE ONLY*
3. State some examples of leading edge lift devices. (FAA-H-8083-31)
Slots—A slot in the leading edge of a wing directs high-energy air from under the wing to the airflow above the wing, accelerating upper airflow. By accelerating the airflow above the wing, airflow separation will be delayed to higher angles of attack. This allows the wing to continue to develop lift at substantially higher angles of attack.
Slats—A miniature airfoil mounted on the leading edge of a wing. They may be movable or fixed. At low angles of attack, movable slats are held flush against the leading edge by positive air pressure. At high angles of attack, the slats are moved forward either by the pilot or automatically by the low pressures present at the leading edge. Slats provide the same results as slots.
- AIRPLANE ONLY*
4. What are spoilers? (FAA-H-8083-31)
Spoilers are devices located on the upper surface of a wing which are designed to reduce lift by “spoiling” the airflow above the wing. They are typically used as speed brakes to slow an airplane down, both in flight as well as on the ground immediately after touchdown.
