When the aircraft is in a landing configuration with gear down and flaps retracted, what is the best glide speed?

The best glide speed for an aircraft in landing configuration with the gear down and flaps retracted is indeed 105 KIAS. This speed allows the aircraft to achieve the best lift-to-drag ratio, maximizing the distance that can be covered while gliding.

In the event of an engine failure or other in-flight emergency while in this configuration, maintaining the best glide speed is crucial. At this speed, the aircraft remains in a stable aerodynamic state, allowing for effective management of altitude and forward distance. Achieving and maintaining this speed can also ensure that the pilot has sufficient control authority to make necessary adjustments to the glide path while searching for a suitable landing area.

Other speeds presented would not optimize the gliding performance and could lead to a loss of control or reduced effectiveness in managing the emergency situation. It’s essential for pilots to understand the implications of operating at the correct speeds under various configurations to ensure safety and effectiveness in flight operations.