What occurs to lift when the angle of attack increases beyond a critical threshold?

When the angle of attack exceeds a critical threshold, the airflow over the wings begins to separate from the wing's surface. This phenomenon leads to a stall, which is characterized by a significant reduction in lift. The critical angle of attack is the maximum angle at which the wing can generate lift effectively before airflow separation occurs. Beyond this point, a dramatic decrease in lift occurs, making the aircraft more difficult to control and often leading to uncommanded descent or loss of altitude.

Understanding this concept is crucial for pilots because maintaining an appropriate angle of attack is essential for safe flight operations. Recognizing the onset of stall conditions enables pilots to react appropriately by reducing the angle of attack and restoring smooth airflow over the wings. This awareness of aerodynamic principles underpins effective flight training and safe piloting practices.