What is the main purpose of a stall warning system in an aircraft?

The main purpose of a stall warning system in an aircraft is to warn the pilot before the aircraft exceeds its critical angle of attack. This is crucial for flight safety, as a stall occurs when the wings no longer generate sufficient lift, which can lead to a loss of control. By providing timely warnings, the stall warning system gives pilots the opportunity to take corrective actions—such as reducing the angle of attack or increasing airspeed—before reaching a critical situation.

Stall warning systems use various sensors to monitor the aircraft's angle of attack. When the angle approaches a predetermined threshold, the system alerts the pilot, often through audible and visual signals. This proactive measure is vital for preventing situations that can result in dangerous stalls, especially during critical phases of flight such as takeoff and landing. The information provided by the stall warning system is a key component of a pilot's situational awareness, thereby enhancing overall flight safety.