What effect does increasing angle of attack (AOA) have on the stall warning system?

Increasing the angle of attack (AOA) has a significant impact on the stall warning system because the system is designed to alert pilots to the approach of a stall condition. As the angle of attack increases, the airflow over the wings begins to separate, leading to decreased lift and an imminent stall.

In many aircraft, stall warning systems utilize a sensing mechanism that detects changes in airflow or pressure on the wings. When the AOA gets close to the critical angle, where the airflow starts to separate, this condition creates a suction force. This force can trigger the stall warning horn or other alert mechanisms within the aircraft, signaling to the pilot that they are on the verge of stalling.

This response is crucial for maintaining awareness and enabling the pilot to take corrective action before a stall occurs. Understanding this mechanism helps pilots manage their aircraft safely, particularly in various flight conditions. The other options presented do not accurately reflect the relationship between AOA and the stall warning system, as they do not relate to how the stall warning is activated or the aerodynamic principles at play.