The Mil Mi-10 (NATO reporting name Harke), given the product number izdeliye 60, is a Soviet military transport helicopter of flying crane configuration, developed from the Mi-6, entering service in 1963.
[4] The advent of the Mi-6 gave the Soviet Union the very useful ability to move and place large, bulky or heavy loads with precision.
Limitations of the Mi-6 in the flying crane role included a weight to payload ratio and the inability of the crew to easily see the load and its intended final position.
The Mil OKB's response drew heavily on the Mi-6, utilising the dynamic components and 4,100 kW (5,500 hp) Soloviev D-25V turboshaft engines, on a slim fuselage sitting on four tall strut braced undercarriage legs, with a wide track allowing the helicopter to taxi over loads, or for mobile loads to be moved underneath.
An early production Mil Mi-10 was exhibited in western Europe for the first time at the June 1965 Paris Air Show at Le Bourget Airport.
The main mission of the early Mi-10 virtually evaporated with the improvements in contemporary ballistic missiles[clarification needed]; thus the majority of the long-legged variants were converted to Mi-10PP (or Mi-10P) airborne Electronic Counter-Measures helicopters, carrying a large ST-900 Step (Steppe) ECM pod under the fuselage mounted on a pallet.