Wings do not stop flying because of low speed. They stop because of angle. Push the angle of attack past the critical point and airflow separates from the upper surface. Lift collapses. That is a stall.
Stalls can happen at any speed and any attitude. A steep turn at high speed can stall the outer wing. A sudden pull on the yoke can stall the aircraft in level flight. The common factor is always the angle, not the airspeed.
Warning and recovery
- Stick shaker or buzzer before the stall
- Reduced angle of attack by lowering the nose
- Adding power to regain energy
- Leveling wings before pulling out
Training emphasizes recognition and recovery because stalls on approach or in the traffic pattern kill pilots every year. Modern airliners have envelope protection that prevents the condition entirely in normal law.
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