powered lift system

…Small, slow-speed aircraft such as light aircraft have small wing loadings and short runways, so by strengthening their high-lift devices, they can become short-field takeoff and landing aircraft. However, medium to large aircraft have to increase their wing loadings or the aircraft will become too large, increasing their weight and reducing performance and economy. Therefore, they are equipped with fairly powerful high-lift devices, and to make them short-field takeoff and landing aircraft, it is necessary to use a powered lift system, which is a high-lift device that uses more powerful thrust. The main powered drift systems that have been used so far are (1) propeller wake deflection, which hits the propeller wake against the flap and bends it downward, (2) EBF (short for externally blown flap), which hits the jet exhaust from the underside of the wing against the flap and bends it, (3) USB (short for upper surface blowing), a type of EBF that uses the phenomenon that when the jet exhaust is blown over the upper surface of the wing, it bends along the flap, and (4) IBF (short for internally blown flap), which guides the jet exhaust into the wing and blows it out diagonally downward from the trailing edge.…

*Some of the terminology that refers to "powered lift system" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…軽飛行機など小型低速機はもともと翼面荷重が小さく滑走距離が短いので，高揚力装置の強化で短距離離着陸機になりうる。しかし，中～大型機は翼面荷重を大きくしないと機の寸法が大きくなりすぎ，自重が増えて性能や経済性が悪くなるので，もともとかなり強力な高揚力装置を備えてあり，短距離離着陸機とするには，より強力な推力利用の高揚力装置であるパワードリフト･システムpowered lift systemを使う必要がある。これまで実用されたおもなパワードリフト･システムは，(1)プロペラの後流をフラップに当てて下方へ曲げるプロペラ後流変向，(2)ジェット排気を翼下面からフラップに当てて曲げるEBF(externally blown flapの略)，(3)EBFの一種で，ジェット排気を翼上面に流すとフラップに沿って曲がる現象を利用したUSB(upper surface blowingの略)，(4)ジェット排気を翼内に導き後縁から斜め下向きに吹き出すIBF(internally blown flapの略。…

※「powered lift system」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報