When does the stick shaker activate as a stall warning?

• A. 10-15 knots before stall
• B. 5-10 knots before stall
• C. 15-20 knots before stall
• D. 3-5 knots before stall

Answer: (B)

The stick shaker activates as a stall warning at 5-10 knots before reaching the stall condition. This activation is a crucial safety feature designed to alert pilots that the aircraft is approaching a stall, thereby prompting timely corrective actions to avoid an actual stall from occurring. The stick shaker mechanically vibrates the control yoke or stick, providing a tactile warning that enhances situational awareness in the cockpit.

The timing of this warning allows pilots to recognize the impending stall with sufficient response time. It is specifically calibrated to trigger within that 5-10 knot range above the stall speed, which is critical for preventing loss of control. Knowing when the stick shaker activates aids pilots in their decision-making processes during critical phases of flight, especially when operating in conditions that could lead to a stall.