What is the stall speed in the clean configuration (Vso)?

The stall speed in the clean configuration, often denoted as Vso, represents the minimum airspeed at which an aircraft can maintain level flight without entering a stall, assuming no configuration changes such as flaps or landing gear being deployed. It is crucial for pilots to know the stall speed when performing various flight maneuvers and during approach and landing phases.

In this case, 64 knots is the correct stall speed in the clean configuration for the aircraft being referenced. This value is typically determined during comprehensive testing of the aircraft and indicates the speed below which the aircraft will begin to stall if the angle of attack exceeds an acceptable limit. Knowing Vso helps pilots establish safe operating speeds and contributes to effective decision-making during different phases of flight.

Understanding stall speeds is fundamental for flight safety, particularly in Part 135 operations, where proficiency in maneuvering and performance characteristics under different configurations is essential for maintaining safety standards.