The Mi-8 prototype incorporating an Mi-4 main rotor and transmission and one 2700shp Soloviev AI-24V turbine mounted on top of fuselage. First flown on 24 June 1961 and subsequently fitted with 5-blade rotor and two 1400shp Isotov TV2-117 engines, being the standard for the Mi-8.
Engine: 1 x AI-24V turboshaft, 1425kW
Main rotor diameter: 21.0m
Max take-off weight: 11200kg
Empty weight: 5726kg