What is the best glide speed with the aircraft in a clean configuration?

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The best glide speed in a clean configuration is important for maximizing the distance the aircraft can cover while gliding. When an aircraft is in a clean configuration, it refers to having all flaps and landing gear retracted, reducing drag and allowing for greater efficiency in flight.

The choice of 125 KIAS as the best glide speed suggests that this speed balances lift and drag effectively, maintaining optimal aerodynamic performance during a glide. At this speed, the aircraft can achieve the best lift-to-drag ratio, allowing it to glide the farthest distance per altitude lost.

Higher glide speeds would require more energy and would not allow the aircraft to maximize its glide ratio. Conversely, lower speeds may lead to stalling conditions or insufficient lift, which could hinder the aircraft's ability to maintain altitude or control. Therefore, the selection of 125 KIAS represents an ideal compromise for achieving efficient gliding performance in a clean configuration.