What do you call the speed that provides the best lift to drag ratio?

The speed that provides the best lift-to-drag ratio is known as Vglide. This speed is crucial for pilots, particularly during glide scenarios, as it allows for the maximum distance to be covered for a given altitude loss. When flying at Vglide, the aircraft is able to optimize its aerodynamic efficiency, thereby making the best use of lift while minimizing drag. This is particularly important during emergency situations when the aircraft may have lost engine power and the pilot needs to glide to a suitable landing area.

Understanding Vglide is essential for managing energy during flight and ensuring safety in situations where altitude must be converted to distance efficiently. It helps pilots plan better during descents and helps in making informed choices when configuring the aircraft for landing or when faced with engine failure.