Which speed represents the stall condition for landing configuration (Vso)?

The stall speed in landing configuration, denoted as Vso, refers specifically to the minimum steady flight speed that an aircraft must maintain during landing. It is the speed at which the aircraft will lose lift and begin to stall if it is in the landing configuration—typically characterized by deployed flaps and landing gear extended.

In this configuration, the aircraft is at its highest drag and lowest lift capabilities, meaning that if the speed falls below Vso while making approaches to land, it can result in an aerodynamic stall. Understanding Vso is crucial for pilots as it helps ensure they maintain a safe margin above this speed during the approach and landing phases of flight, minimizing the risk of an accident due to loss of control.

The other options, while related to flight speeds, do not accurately describe Vso. Stall speeds provide a critical performance point and are essential for safe maneuvering during landing approach, making the identification of Vso vital for commercial pilots navigating their check rides.