What is the optimum sink rate when flying in a clean glide at 125 KIAS?

The optimum sink rate in a clean glide for the T-6A at 125 KIAS is established to maximize distance traveled while minimizing altitude loss. This sink rate is crucial for efficient gliding, particularly in situations where the pilot needs to manage altitude and ground distance effectively, such as preparing for a landing or avoiding obstacles.

At 125 KIAS, the calculated optimum sink rate of 1350 feet per minute balances the aerodynamic performance of the aircraft and its energy state. This value allows the T-6A to maintain the best glide performance, translating to optimal lift-to-drag ratio. While lower sink rates might seem beneficial in extending glide time, they may not cover the maximum distance achievable given the airspeed, resulting in inefficient glide performance. Thus, selecting the sink rate of 1350 feet per minute reflects an understanding of the aircraft's characteristics and operational limits in a clean configuration.