Crew: 2 Capacity: 142 kg (313 lb) payload Length: 6.53 m (21 ft 5 in) fuselage Empty weight: 878 kg (1,936 lb) Gross weight: 1,020 kg (2,249 lb) Fuel capacity: 50 kg (110 lb) fuel Powerplant: 1 × Shvetsov M-11FR-1 5-cylinder air-cooled radial piston engine, 100 kW (140 hp) Main rotor diameter: 2× 10 m (32 ft 10 in) Main rotor area: 157.1 m2 (1,691 sq ft) co-axial rotors