Which speed range corresponds to the white arc on the airspeed indicator?

The white arc on the airspeed indicator represents the flap operating range for the aircraft. This range indicates the speeds at which the flaps can safely be deployed. For the Cessna 152, this range typically falls between 35 to 85 knots indicated airspeed (KIAS).

The lower limit of 35 KIAS signifies the stall speed in a landing configuration with flaps extended, ensuring that pilots are aware of the minimum speed required to maintain control of the aircraft while flaps are in use. The upper limit of 85 KIAS indicates the maximum speed at which the flaps can safely be operated. If a pilot exceeds this speed while the flaps are deployed, it may lead to structural damage and potential loss of control.

Understanding the significance of the white arc is crucial for a pilot's ability to safely manage flap deployment during landing and takeoff phases of flight. The airspeed indicator helps pilots maintain effective control and ensures they remain within the operational limits for safe flying.