What power setting should be set during the transition for a landing-flap setting?

During the transition to landing-flap setting, setting the power to approximately 20% torque is critical for achieving the desired glide path and maintaining proper control of the aircraft. At this power setting, the aircraft can maintain a stable descent rate while transitioning to landing configuration.

Using 20% torque helps to ensure the aircraft is not overpowered, which could lead to excessive altitude loss or a steeper descent than desired. This power setting also assists in managing the approach speed and allows the pilot to maintain a balanced flight as the landing flaps are deployed. The transition helps in aligning the aircraft properly for touchdown while ensuring both comfort and safety.

Other power settings, while they may allow for some level of control, do not provide the optimal balance needed during this specific phase of flight, leading to potential difficulties in maintaining a controlled descent and approach speed. Adjusting power to 20% ensures that the aircraft is prepared for the final approach and landing without risking loss of control or inadequate descent management.