What is the speed for Vso in knots indicated airspeed (KIAS)?

The stalling speed in landing configuration, known as Vso, is typically calculated under specific conditions that allow for the safe control of the aircraft when it is at its lowest flight speed. This speed is critical as it defines the threshold below which the aircraft may enter a stall if the angle of attack is increased excessively.

In many multi-engine airplanes, Vso usually falls within the range of 55 knots indicated airspeed (KIAS). This speed is derived from the aircraft's design specifications and is important for pilots to know for safe operation during landing approaches and in other low-speed scenarios. Knowing Vso helps pilots maintain control and avoid stalling the aircraft during crucial phases of flight, such as when making a landing approach.

In practice, pilots will refer to their specific aircraft's Pilot Operating Handbook (POH) or Aircraft Flight Manual (AFM) to confirm the Vso for the particular model being flown, but 55 KIAS is a common value for multi-engine planes used in training and commercial operations.