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The An-2 indeed has no stall speed quoted in the operating handbook. Pilots of the An-2 say one can fly the aircraft in full control at 30 mph (as a contrast, a modern Cessna four-seater light aircraft has a stall speed of around 50 mph). This slow stall speed makes it possible for the aircraft to fly backwards (if the aircraft is pointed into a headwind of, say, 35 mph (56 km/h), it will travel backwards at 5 mph (8.0 km/h) whilst under full control). (This is also possible with almost any other true Short Take Off and Landing (STOL) aircraft, but the Antonov has the distinction of being able to do the trick in the mildest headwind.)
