In the broadest sense, it refers to the movable parts of the fixed wings of an aircraft, but it is usually used as a high-lift device, and in the narrowest sense, it refers to the parts installed on the trailing edge of the main wing (trailing edge flaps). Trailing edge flaps are movable trailing edge parts of the main wing that bend downward at low speeds during takeoff and landing, or bend downward while extending backward, thereby increasing the lift coefficient at a constant angle of attack. Leading edge flaps (slats) are movable leading edge parts of the main wing that bend downward at low speeds, or bend downward while extending forward, thereby increasing the stall angle of attack, thereby increasing the lift coefficient. Trailing edge flaps are installed on almost all airplanes today, and leading edge flaps are installed on many high-performance aircraft. flap |
広義には航空機の固定翼の可動部分をいうが,普通は高揚力装置として使用されるものをさし,最も狭義には主翼の後縁に装備されるもの (後縁フラップ) を意味する。後縁フラップは,主翼の後縁部を可動式とし,離着陸の際の低速時に下方に曲げ,あるいは後方に引き伸ばしながら下方に曲げることによって,一定の迎え角における揚力係数を増す働きをする。前縁フラップ (スラット slat) は,主翼の前縁部を可動式とし,低速時に下方に曲げ,あるいは前方にせり出しながら下方に曲げ,失速迎え角を増すことによって揚力係数を増す働きをする。後縁フラップは,今日の飛行機のほとんどすべてに,また前縁フラップは高性能機の多くに装備されている。
フラップ
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