When does the stick shaker activate in an aircraft?

The stick shaker is a vital safety feature in an aircraft designed to alert pilots that they are approaching a stall condition. It activates at a speed that is typically 5 to 10 knots above stall speed. This precautionary measure gives pilots an early warning that the aircraft is nearing a stall, allowing them to take corrective action before reaching the stall threshold.

By activating at this specific range above stall speed, the stick shaker provides pilots with critical time to respond effectively, enhancing flight safety and preventing a stall from occurring. The activation of the stick shaker at this point is particularly important as it serves to help pilots maintain awareness of their airflow and lift conditions, especially during critical flight phases such as takeoff and landing.

In contrast, activating below stall speed would not provide adequate warning, as the aircraft would already be in a stall condition. Speed associated with VY, which is the best rate of climb speed, does not accurately signify an impending stall condition, and maximum bank angles do not directly correlate with stall warning indications. Thus, activation at 5 to 10 knots above stall speed is the most effective and practical approach.