What is the airspeed at which the T-6's stick shaker activates?

The activation of the T-6's stick shaker occurs when the aircraft approaches a critical angle of attack that indicates an impending stall. Specifically, this activation happens at an airspeed of 5-10 knots above stall speed. The stick shaker provides a tactile warning to the pilot, alerting them to the increased risk of stalling, which is crucial for maintaining control of the aircraft during critical phases of flight. This safety feature ensures that pilots are adequately informed to take corrective action, such as reducing the angle of attack or increasing airspeed to avoid a stall situation.

In contrast, the other options do not relate to the characteristics of the stick shaker or stall warning systems. For example, the choice regarding activation above Vmo refers to a maximum operating speed, which is not relevant to stall warning mechanisms. The options related to normal speeds or being below 5 knots do not correspond to the conditions necessary for stick shaker activation, which focuses specifically on stall behavior rather than general operational parameters. Thus, the specified airspeed range above stall speed is integral to understanding the operation of the stick shaker in the T-6 aircraft.