What speed and power setting is recommended for a no flap (NF) configuration on downwind?

The recommended speed and power setting for a no flap (NF) configuration on downwind is crucial for maintaining optimal aircraft performance and control during the approach. In no flap configuration, the aircraft lacks the lift-enhancing benefits that flaps provide, which necessitates a higher airspeed to avoid stalling and to ensure a safe margin above stall speed.

Choosing a speed of 120 knots indicated airspeed (KIAS) strikes a balance between being fast enough to ensure adequate control authority while low enough to facilitate a stable final approach. A power setting of approximately 31% allows the engine to maintain this speed without excess power that could lead to an unusual pitch attitude or excessive descent rate. This configuration provides a good compromise between descent rate and airspeed control, which is essential for managing the aircraft during the downwind leg of the flight.

Higher speeds and power settings present potential challenges in terms of control and landing configuration adjustments, as they may introduce more drag and lead to inefficient energy management during the approach. Thus, 120 KIAS at about 31% power is an effective and standardized recommendation for pilots operating the T-6B in a no flap scenario.