The Mil Mi-14 is a Soviet anti-submarine helicopter which is derived from the earlier Mi-8.
Design and development
Formal development of an anti-submarine warfare (ASW) version of the Mil Mi-8 transport helicopter was authorised by the Soviet Communist Party Central Commitee and Council of Ministers in April 1965, with the objective of replacing the Mil Mi-4 in the short-range, shore based anti-submarine role. The new helicopter was required to have an endurance of 2 hours on station at a radius of 222 kilometres (120 nmi; 138 mi) from base.
The new design (with the internal designation V-14) differed from the Mi-8 in having a boat-like hull similar to the Sea King, allowing it to operate off the water, and a retractable undercarriage, with the mainwheels retracting into large sponsons on the rear of the fuselage. The helicopter was to be powered by two Klimov TV3-117MT turboshaft engines. A watertight weapons bay is fitted to the centreline of the fuselage allowing internal carriage of a single torpedo or eight depth charges, while a radome housing a search radar is fitted beneath the nose.
The first prototype V-14, converted from a Mi-8 and powered by the older and less powerful Klimov TV2-117 engines, flew on 1 August 1967. Development was slowed by problems with the helicopter's avionics and due to reliability problems with the TV3-117 engines, with production at Kazan not starting until 1973, and the helicopter (now designated Mi-14) entering service on 11 May 1976.
Length: 18.38 m (60 ft 3 in)
Rotor diameter: 21.29 m (69 ft 10 in)
Height: 6.93 m (22 ft 9 in)
Disc area: 356 m² (3,832 ft²)
Empty weight: 11,750 kg (25,900 lb)
Max. takeoff weight: 14,000 kg (30,865 lb)
Powerplant: 2 × Klimov TV3-117MT turboshafts, 1,454 kW (1,950 shp) each
Maximum speed: 230 km/h (124 kt)
Ferry range: 1,135 km (705 mi)
Service ceiling: 3,500 m (11,500 ft)
Endurance with max fuel: 5 h 56 min
torpedoes, bombs and depth charges