Aircraft systems and instrumentsQuestion 538 of 934

What is the lower limit of the white arc (VSO)?

  1. The stalling speed in the landing configuration
  2. The stalling speed in the clean configuration
  3. The maneuvering speed at maximum weight
  4. The maximum landing gear operating speed
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Correct answer: The stalling speed in the landing configuration

In small aircraft, this is the power-off stall speed at the maximum landing weight with the gear and flaps down.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 8: Flight Instruments — Airspeed Indicator Markings, page 211

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Questions last reviewed: 18 October 2026