What airspeed is indicated by the white arc on an airspeed indicator?

The white arc on an airspeed indicator represents the stall speed range in the landing configuration, which includes the lower limit (stalling speed) and the upper limit (the speed at which the aircraft is fully clean and can no longer be considered in landing configuration). The white arc typically indicates the speed range at which the aircraft can be safely flown while in landing configuration, including the flap settings necessary for approach and landing. This range is vital for pilots to understand, as flying within these speeds reduces the risk of stalling during critical phases of flight, particularly during an approach or landing.

Recognizing the stall speed range is crucial for ensuring a safe landing approach; if the airspeed falls below this range, the aircraft risks entering a stall. This information allows pilots to effectively manage their flight profile during these critical operating conditions.