What is the required AOA activation point for the stick shaker at higher altitudes?

The required angle of attack (AOA) activation point for the stick shaker at higher altitudes is set at 0.45 AOA. This point is critical for ensuring stall awareness and preventing loss of control during flight, especially under conditions where the aircraft may experience reduced performance due to thinner air at higher elevations.

As altitude increases, the stall characteristics of an aircraft can change, necessitating adjustments in the AOA thresholds for safety devices like the stick shaker. The 0.45 AOA threshold at higher altitudes allows the stick shaker to activate with sufficient margin to avert stalls while accounting for the different aerodynamic pressures encountered up high. This adjustment helps pilots maintain situational awareness and respond appropriately as airspeed decreases close to stall conditions.