…However, there is a limit to this, and when the angle of attack reaches a certain value, the airflow over the wing separates from the surface and forms vortices, which results in a significant decrease in lift and a sudden increase in drag, making flight difficult. This condition is called a stall. In order for an airplane to maintain a certain speed and continue level flight, the lift must be in balance with gravity, and the thrust of the propulsion system must be in balance with the drag acting on the entire airplane. … From [Wings]…Lift increases as the angle of attack increases, but if the angle of attack is too large, the airflow cannot keep up with the upper surface of the wing, and it separates and swirls, reducing lift instead. This is called a stall. When the wing stalls, the aircraft tends to suddenly descend or tilt to the side, so it usually flies at an angle of attack that does not stall (up to about 15 degrees, depending on the wing). … *Some of the terminology explanations that mention "stall" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…ただしそれには限界があって,迎え角がある大きさに達すると,翼上面の気流が表面からはがれて渦ができ,その結果揚力が著しく減り抗力が急激に増して飛行が困難になる。この状態を失速stallという。飛行機がある速さを保って水平飛行を続けるためには,揚力が重力とつりあい,推進装置の推力が飛行機全体に働く抗力とつりあっていなければならない。… 【翼】より…揚力は迎え角を増すほど大きくなるが,迎え角を大きくしすぎると気流が翼上面についていけなくなり,途中ではがれて渦を巻くので,揚力が逆に減ってしまう。これを失速stallと呼ぶ。翼が失速すると機は急に下降したり横に傾きやすくなるので,ふつうは失速しない範囲の迎え角(翼によって違うが15度くらいまで)で飛ぶ。… ※「stall」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 |
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