Mil Mi-26

The Mi-26 was developed to provide the Soviet Union with a transport helicopter substantially larger than the Mil Mi-6 and Mil Mi-10. The Mil design bureau began work in the 1970s, and the prototype first flew in 1977.¹ Its defining engineering feature is a large eight-blade main rotor driven by two Lotarev D-136 turboshaft engines. The rotor system and transmission were designed to lift a payload approaching 20 tonnes while retaining useful performance at high altitude and in hot conditions.²

The helicopter has a broad, box-shaped fuselage, a rear loading ramp, and a powered cargo-handling system. Its landing gear is fixed, with multiple wheels arranged to support operations from rough or unimproved surfaces. The NATO reporting name is Halo.

The Mi-26 combines internal cargo carriage with heavy external-sling lifting, giving it unusual flexibility for a rotorcraft. Its cargo hold can accommodate vehicles, engineering equipment, pallets, or groups of personnel, while the external-load system permits transport of loads that are too large to enter through the rear ramp.³ Published specifications commonly give a maximum takeoff mass of about 56 tonnes and a payload of up to 20 tonnes, although useful load varies with fuel, temperature, altitude, and mission equipment.

Military operators have used the type for troop and supply transport, recovery of damaged aircraft, and movement of artillery or construction machinery. Civil operators employ related variants for logging, power-line work, oil-field logistics, firefighting, and disaster response. The Mi-26T became the principal civil transport model, while later versions received updated avionics and mission systems.

The Mi-26 entered Soviet service in 1983 and became a major heavy-lift asset for the Soviet armed forces and later the Russian Aerospace Forces.¹ Its operational reach extended beyond routine transport: helicopters of the type supported relief and recovery missions after earthquakes, floods, industrial accidents, and other disasters. The aircraft also became associated with the 1986 Chernobyl disaster, where specially equipped helicopters helped limit the spread of radioactive contamination and later assisted with recovery operations.⁴

Mi-26s have served in Afghanistan, the North Caucasus, and international civilian markets. Production continued after the dissolution of the Soviet Union, with manufacturing centered at the Rostvertol plant in Rostov-on-Don. Modernized Mi-26T2 aircraft introduced digital cockpit equipment and reduced crew workload while retaining the basic airframe and propulsion arrangement.

The Mi-26's size creates operational constraints as well as advantages. Its enormous rotor disc requires substantial clearance, and the aircraft's performance is strongly affected by density altitude and payload distribution. External loads demand careful control of oscillation, visibility, and downwash, so the helicopter is often assigned specialist ground teams and crews.

A notable recovery mission occurred in 2002, when an Mi-26 lifted a damaged United States Marine Corps CH-53E Super Stallion from mountainous terrain in Afghanistan; the recovery demonstrated the type's ability to move another very large helicopter when conventional recovery aircraft were unavailable.³ The Mi-26 has also been used to transport heavy fire engines, railway equipment, and even aircraft components. Its combination of a high payload ceiling and vertical access makes it valuable precisely in locations lacking roads or runways.

Heavy-lift helicopter

A helicopter designed to carry unusually large internal or external loads, generally at the cost of greater size, fuel consumption, and operating complexity.

Turboshaft engine

A gas-turbine engine that delivers power through a shaft to drive a rotor or other machinery rather than producing most of its thrust as a jet.

External sling load

Cargo carried beneath a helicopter on cables, straps, or a cargo hook rather than inside the fuselage.

NATO reporting name

A standardized code name assigned by NATO to identify military equipment from countries formerly outside its reporting system.