Mi-8 Hip

The Mil Mi-8 (NATO reporting name: Hip) is a Soviet-designed medium twin-turbine helicopter originally developed by the Mil Design Bureau and produced by the Kazan Production Plant. Introduced into the Soviet Air Force in 1967, the aircraft operates as a transport, airborne command post, armed gunship, and reconnaissance platform. With over 17,000 units built and used by more than 50 countries, the Mi-8 is the most-produced helicopter in history.

Development

Mikhail Mil proposed a twin-engine turbine replacement for the Mil Mi-4 in 1959. The single-engine V-8 prototype made its maiden flight in June 1961, followed on 2 August 1962 by the V-8A prototype equipped with two Isotov TV2 turboshaft engines, marking the first Soviet helicopter flown with purpose-built gas turbines. Government testing concluded in November 1964, leading to mass production at the Kazan plant in late 1965.

Design

The Mi-8 features a five-blade main rotor introduced in 1963 to reduce vibration and a main cabin designed to accommodate up to 24 passengers or 4,000 kg of cargo. Second-generation models transitioned from a right-side pusher tail rotor to a left-side tractor configuration to increase yaw authority across advancing rotor blades. Power on the Mi-8MT variant is supplied by twin Klimov TV3-117MT turboshaft engines producing 1,454 kW each.

Armament

Armed variants carry up to 4,000 kg of stores across four to six external hardpoints. Munitions include 57 mm S-5 unguided rockets in UV-16-57 or UV-32-57 pods, 250 kg bombs, and anti-tank guided missiles such as the AT-2 Swatter, 9M17 Phalanga, or Malyutka. Defensive machine guns include side-mounted 7.62 mm PK guns or a nose-mounted flexible 12.7 mm KV-4 machine gun.

Operational History

The Soviet Union deployed fleets of Mi-8s during the Soviet–Afghan War and used them to drop over 5,000 metric tons of materials onto the Chernobyl reactor in 1986. The type saw combat during the Iran–Iraq War, the War in Abkhazia, the Yugoslav Wars, and the Russo-Ukrainian War. Export customers and operators include Finland, Georgia, India, Iraq, Ukraine, and Yugoslavia.

Variants

• Mi-8T: First mass-production utility transport variant capable of carrying 24 troops, unguided rocket pods, and side-mounted machine guns.

• Mi-8TVK: Direct air support gunship variant fitted with six external hardpoints and a flexible 12.7 mm nose machine gun.

• Mi-8IV: Airborne command post variant equipped with the Ivolga communication system and tail-boom Doppler radar.

• Mi-8PP: Airborne electronic warfare platform fitted with the Polye jamming system to disrupt ground-based air defense radars.

• Mi-8P: Civilian passenger transport variant powered by twin Klimov TV2-117A engines with seating for up to 32 passengers.