NATO Codename "Hip"
|Tactical-technical characteristics of the Mi-8T Transport Helicopter|
|Entered service in||1965|
|Dimensions and weight|
|Weight (empty)||6 965 kg|
|Take off weight||11 100 kg|
|Maximum take off weight||12 000 kg|
|Rotor diameter||21 290 mm|
|Overall length (without rotors)||18 220 mm|
|Wing span||4 750 mm|
|Overall height||4 500 mm|
|Useful cargo load||2 355 t|
|Maximum useful cargo load||4 000 t|
|Maximum slung load||3 000 kg|
|Cargo compartment dimensions||5 340 x 2 340 x 1 800 mm|
|Passengers||24 equipped troops or 12 patients|
|Machine gun||7.62-mm PK|
|Engines||2 x TV2-117|
|Engine power||2 x 1 500 hp.|
|Cruise speed||225 km/h|
|Maximum speed||250 km/h|
|Flight range (with normal load)||465 km|
|Flight range (with additional fuel tanks)||950 km|
|Hovering ceiling||800 m|
|Service ceiling||4 500 m|
The Mi-8 Transport Helicopter
is the most massively produced helicopter in the world. In Soviet Union
developed more than 50 various modifications of this helicopter and built
approximately 12 000 helicopters including 3 600 built for export. These helicopters are
still built at Mil Moscow Helicopter Plant, Kazan Helicopter
Plant and Ulan-Ude Aviation Plant. The Mi-8 Transport Helicopters
took part in a great number of military conflicts all around the world
including Afghanistan and both Chechnya wars. At the moment Mi-8 with it's
various modifications are operational in over 50 countries of the world
including some NATO countries.
Development of the Mi-8 Helicopter began at the beginning of 60-ties. Helicopter's name as Mi is shortened it's general designer's surname. This helicopter was intended to replace the outdated and lighter Mi-4 helicopter. First prototype of the Mi-8 with a 4-blade rotor was tested in 1962. Tests showed that prototype has a number of disadvantages and after it's improvement in 1963 began tests of the second machine with a 5-blade rotor. Tests showed that this new transport helicopter had 2.5-fold better weightlifting and 1.4-fold higher speed comparing with the Mi-4. This version was adopted and it's serial production began in 1965.
The Mi-8T is a base version of the transport helicopter available in civil and military versions. It's cockpit accommodates three crew members - commander, navigator, and flight mechanic. The cockpit can be armored (military version). The helicopter has external hardpoints for external armament such as unoperated aviation missiles, bombs and a slung load. A slung load is up to 3 000 kg.
Helicopter's landing-transport equipment can be used to load light towed combat material and armament with winches and for people rescuing from the ground or from the sea by an electrically operated 200 kg capacity hoist. The cabin has cargo tiedown points on the floor. Ramps are provided for loading light vehicles.
Fuel is carried in two flexible internal and external fuel tanks (1 870 l capacity both). Range of flight with normal load is 465 km. However the fuel capacity can be increased up to 3 700 l for 950 km flying range. The Mi-8 "Hip" uses aviation kerosene.
Helicopter has a transmission scheme very similar to the Mi-4. Fuselage is clinched from aluminum plates. Main and turn rotors have 5 and 3 blades consequently. The main rotor features hollow longeron blades made from pressed high quality aluminum alloy. Longerons are fitted with icing prevention system's heating elements operated in automatic or manual modes. All main rotor blades are fitted with pneumatic failure alarm system.
The Mi-8 "Hip" Transport Helicopter is powered by two Klimov TVZ-117 type turboshaft engines. Engine air intake deflectors prevent ingestion of dust. It is also fitted with electricity generator, hydraulic pumps, cooling fan. The Mi-8 Helicopter engines are ignited by reaction starter motor which can be used as additional electricity source. In case of one of the main engine failures during flight the other main engine power is increased. One engine power is enough to keep horizontal flight without loosing altitude. This feature determines high helicopter flight safety and reliability.
Helicopter has a three bearing fixed chassis fitted with a rubber wheels. Both rear bearings have absorbation devices. The Mi-8 "Hip" is fitted with fire prevention, icing prevention, air conditioning systems.
Protection systems contains exhaust gas spreading, infrared trap launching, and infrared beam impulse generation systems to counteract against enemy guided missiles based on infrared guidance. Helicopter is fitted with an explosion resistant foam filled fuel tanks.
Navigation, piloting, and radio equipment completed with Mi-8 allows to make flights at any day-night time and meteorological conditions. Piloting control system is doubled and based on hydraulic mechanisms. Helicopter is fitted with a four-channel autopilot stabilizing the helicopter in 4 flight coordinates - axis and height, course, alteration, and speed. Navigational devices contain doubled aviahorizont, giromagnetic course compass, radio altitude finder, Doppler effect based speed and side deflection meter.
Threw the helicopter improvement and redesigning for special tasks works there were developed later mentioned and a number of other modifications:
- Mi-8P - Passenger
Helicopter used in the civil air lines and for commercial purposes. This helicopter
has 28 passenger seats;
Also there are such versions as the Fire Fighter Helicopter, Ambulance Helicopter and other.
Excellent survivability. Engine reliability and ability to keep flight with one engine out of service. Powerful armament installed on some modifications.