Which speed is commonly represented in the white arc on the airspeed indicator?

The white arc on the airspeed indicator represents the flap operating range of the aircraft. This arc indicates the speeds at which it is safe to extend and operate the flaps, giving pilots a visual reference for managing airspeed during takeoff and landing phases when flaps are typically deployed.

Operating within the white arc ensures that flaps can be safely used without risking aerodynamic stall due to improperly managing airspeed. The lower limit of the white arc typically signifies the stall speed in a configuration with flaps extended, while the upper limit indicates the maximum speed at which flaps can be safely deployed.

Understanding the significance of the white arc is crucial for pilots, as it plays a vital role in enhancing safety during critical phases of flight, particularly during approach and landing.