Your airliner lands at forty thousand pounds per minute. How does it slow down enough? A wing's curved shape creates lift best when the plane moves fast. But landing safely demands a much slower approach than cruise speed. Slow down too much and the wing stops generating enough lift. Flaps are hinged panels tucked under the wing's trailing edge. When pilots lower flaps, they change the wing's entire profile. A more curved wing surface generates lift at slower speeds. Flaps also extend the wing downward and backward, making it bigger. A larger wing catches more air and supports the full aircraft weight. Flaps do have a downside: they create significant aerodynamic drag. That extra drag acts like a brake, slowing the plane. Pilots don't deploy all flaps at once. They use several stages. Without flaps, modern airliners simply couldn't land safely or efficiently. Flaps let one wing design work at both fast and slow speeds.
A wing's curved shape creates lift most effectively when an aircraft moves at high speed. However, landing safely requires a much slower approach than cruise speed, and slowing down too much causes the wing to stop generating sufficient lift. Flaps solve this problem by allowing one wing design to function at both fast and slow speeds.
Flaps are hinged panels located under the wing's trailing edge. When pilots lower the flaps, they change the wing's entire profile to a more curved surface, which generates lift at slower speeds. The flaps also extend the wing downward and backward, making it larger so it catches more air and can support the full aircraft weight.
Flaps do create significant aerodynamic drag, which acts like a brake and slows the plane. Pilots deploy flaps in several stages rather than all at once. Without flaps, modern airliners could not land safely or efficiently.
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