in the cabin and six bags suspended from the fuselage. The sole prototype crashed in France fighting a fire, soon after display at the 27th Paris Air Show. Mi-6PZh2 A second firefighting helicopter prototype and several conversions with a steerable water cannon in the nose. Mi-6R (R – Retranslyator – ) Specialised radio communications relay variant developed in 1974, prototype conversions only. Mi-6RVK (RVK – raketno-vertolyotny kompleks – heliborne missile system) Tested in 1965 loaded with 9K53, 9K73, 9M21 Luna-MV or 8K114 mobile missile systems. Mi-6S Medical evacuation helicopter, which can carry 41 litters. Mi-6T(NATO – Hook-A) Military transport helicopter, which can seat up to 70 people on tip-up seats along the cabin sides, with additional seat along the center-line. Mi-6TP Convertible freight/passenger helicopter. Mi-6TZ (TZ – toplivo-zapravshchik – fuel tanker) Fuel transport helicopter to refuel vehicles and helicopters on the ground. Mi-6TZ-SV (TZ-SV – toplivo-zapravshchik – sookhoputnyye voyska – fuel tanker-ground forces) Fuel transport helicopter to refuel vehicles on the ground. Mi-6VR (VR - Vodoley – Aquarius) A water spraying research helicopter to test helicopter anti-icing systems. Mi-6VKP (NATO – Hook-B) (VKP – vozdooshnnyy poonkt – airborne command post) Command post transport helicopter to deploy comms and war room on the ground, not usable in flight. Mi-6VUS (NATO – Hook-D) airborne command post with SLAR. Mi-6VzPU (NATO – Hook-D) Service designation of the Mi-6AYa airborne command post with SLAR, entered service as the Mi-22. Mi-6? Developed in 1962 with collapsible BU-75BRM drilling rig for oil exploration in Siberia. Exact designation unknown. Mi-6? Missile fuel transport to supplement the Mi-6PRTBV Mi-6? An experimental conversion in 1976 for testing the rotor system of the Mi-26. Mi-6? An engine testbed, fitted with Soloviev D-25VF engines, as developed for the Mil V-12. Mi-22 VVS designation of the Mi-6AYa/VzPU airborne command post helicopters. Operators Military operators Algerian Air Force Belarus Air Force People's Liberation Army Egyptian Air Force Ethiopian Air Force Indonesian Air Force Iraqi Air Force Kazakh Air Force Laotian Air Force Pakistan Army Peruvian Air Force Peruvian Army Polish People's Republic Polish Air Force Russian Air Force Ukrainian Air Force Aeroflot Soviet Air Force Vietnamese Air Force Specifications (Mi-6) See also Notes References Bibliography External links Cockpit pictures Mi-06 Mil aircraft 1950s Soviet cargo aircraft 1950s Soviet military transport aircraft 1950s Soviet helicopters Twin-turbine helicopters Aircraft first flown in 1957 Military transport helicopters