According to the authors, the situations related to the rotorcraft externally slung cargo release have not been thoroughly investigated and described in scientific publications, and, hence, not reflected in the flight operation regulations. The present Article contains the results of simulator modeled experimental studies of a special situation related to the emergency cargo release from the Mi-171 rotorcraft external sling due to the engine failure, in particular: 1.engine failure during vertical cargo lift; 2.engine failure during rotorcraft level acceleration. Based on the objective data, namely records of phase coordinates of the "rotorcraft-cargo" system and pilot's activities, the modeling results are analyzed. The flight danger zones have been assessed in the coordinates "altitude-velocity" for the take-off for a rotorcraft with the maximum allowed takeoff mass and the externally slung cargo. The "safety" take-off profile for the rotorcraft with a cargo on the sling has been proposed.
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