Last Updated ：2025/12/07

stall speed

(aviation) The airspeed at which the lift generated by an aircraft flying with an angle of attack equal to the stall angle (the point of maximum lift for a given airspeed) is exactly equal to the aircraft's weight; the minimum airspeed at which it is possible to maintain level unaccelerated flight.

Japanese Meaning

失速速度：航空機が翼の揚力がちょうど機体重量と等しくなり、水平で加速なしの飛行を維持できる最低の速度 / 航空機が一定の攻撃角（失速角）において十分な揚力が得られなくなる直前の最低飛行速度

What is this buttons?

During the instrument approach, the pilot monitored the stall speed closely to ensure a safe landing.

Google Translation / DeepL Translation

計器進入中、パイロットは安全な着陸を確保するため、揚力が機体の重量と等しくなる空気速度、すなわち失速速度を注意深く監視した。

Details

Sense（1）

The aircraft configuration was such that there was little or no warning of the stall onset. The inboard slats were extended, and therefore, the flow separation from the stall would be limited to the outboard segment of the left wing and would not be felt by the left horizontal stabilizer. There would be little or no buffet. The DFDR also indicated that there was some turbulence, which could have masked any aerodynamic buffeting. Since the roll to the left began at V₂ + 6 and since the pilots were aware that V₂ was well above the aircraft's stall speed, they probably did not suspect that the roll to the left indicated a stall. In fact, the roll probably confused them, especially since the stickshaker had not activated.

Google Translation / DeepL Translation