Mi -26 helicopter has extremely obvious military use. The maximum internal load and external load of this helicopter is 20 tons, which is equivalent to the load capacity of Lockheed C- 130 Hercules. Mi -26 helicopter is mainly used in remote areas where there are no roads and other ground vehicles can't reach, transporting large equipment and personnel for oil drilling, oil field development and hydropower station construction sites. Mi -26 often needs to be far away from the base in order to fight independently in areas where there are no ground support and navigation support conditions. Therefore, helicopters are required to have all-weather flight capability.
The rotor system is a traditional articulated rotor, and the hub is made of titanium alloy, including flapping hinge and towing hinge, with damper, but without elastic bearing and axial hinge. This kind of rotor is composed of eight blades with equal chord length, which is the single rotor with the largest number of blades in the world. Each blade consists of a tubular steel blade beam and 26 FRP airfoils. The inside of this section is reinforced by wing ribs and stiffeners, filled with honeycomb filler in the middle, and the front edge is provided with a non-removable titanium alloy corrosion protection strip. The blade twist angle is moderate, the blade thickness becomes thinner along the span direction to the tip direction, and the trailing edge is equipped with an adjusting piece, which can be adjusted on the ground according to the flight conditions. The tail rotor consists of five FRP blades, located on the right side of the tail beam, and is a titanium alloy tail rotor hub. In order to adapt to the use in cold areas, both rotor and tail rotor blades are equipped with electric heating anti-icing devices. Rotor speed is 132 rpm. The transmission system includes a main transmission system cooled by a V-26 fan. The transmission power of the main reducer is 147 10 kW. The transmission power of single machine is 8500 kW. The rear drive shaft is located at the top of the cockpit.
The traditional fuselage all-metal riveted semi-rigid pod tail beam structure. Clam-shell rear hatch with folding loading and unloading springboard. The lower surface of the tail beam is flat. The engine compartment is made of titanium alloy for fire prevention. The vertical tail surface is offset to the left. The tail rotor is installed on the right side of the vertical tail plane. The horizontal tail plane is located at the joint of the vertical tail plane and the tail beam. The horizontal tail is fixed in flight, but it can be adjusted on the ground to adapt to the best cruising state. The landing gear can't retract the front three-point wheeled landing gear. Each landing gear has two tires, and the tire size of the main landing gear is 1 120mm× 450mm. The front wheel is controllable, the tire size is 900 mm× 300 mm, and there is a retractable tail sled at the end of the tail beam. When the tail sled is put away, you can freely enter the rear cargo door. The main landing gear can be hydraulically adjusted to land at different locations through the rear cargo door. When off the ground, the sensor on the landing gear can display the takeoff weight of the helicopter through the dashboard behind the flight engineer's seat. The power plant is two 7460 kW D- 136 turboshaft engines, which are installed side by side above the cockpit in front of the rotor shaft. In order to adapt to the operation in cold areas and unfinished workshops, two sets of anti-icing devices-electric heating and hot air anti-icing system are adopted in the engine intake. A particle separator is installed in front of the air inlet to prevent foreign bodies from invading the engine. There is a third air inlet above the two air inlets of the engine for cooling the oil radiator. The engine is equipped with a constant system for synchronizing power output and maintaining rotor speed. If the output power of one engine is attenuated, the other engine can automatically output the maximum power. Mi -26*** is equipped with 10 fuel tank. The fuel system of each engine is independent. Eight fuel tanks are under the cockpit floor and two collection tanks are above the engine. Under normal circumstances, oil is supplied by oil pump. In case of failure, oil can be transported by gravity. The maximum standard fuel quantity is 12000 liters. In addition, you can bring four auxiliary fuel tanks. Cockpit The cockpit can accommodate four crew members. The pilot is in the left seat, and the co-pilot and the pilot sit side by side. There is a folding seat between the two pilots, a flight engineer seat on the left and a pilot seat on the right. There is a 4-seat cabin behind the cockpit. The cargo hold can carry two armored infantry vehicles and 20,000 kilograms of international standard containers. There are about 20 folding seats along the two walls of the cargo hold. The military model can accommodate 80 fully armed soldiers. Used for battlefield rescue, it can accommodate 60 wounded people lying on stretchers and 4 to 5 medical staff. The windshield has heating equipment. There are four big bubble portholes in the cockpit. The front pair of portholes can be opened outward and backward. On the right side in front of the cargo hold and on both sides of the cargo hold behind the main landing gear, there is a hatch that can be opened downwards and can also be used as a boarding ladder. The cargo hold can be loaded and unloaded through a downward opening door (which can also be used as a loading and unloading springboard) and two upward opening clamshell doors (which can form the rear wall of the cargo hold when closed). Each hatch can be opened and closed by hydraulic system, and hand pump can also be used in case of emergency. Two electric winches are installed on the guide rail at the top of the cargo hold, and each winch can lift 2500 kilograms of goods along the cargo hold. There are winches capable of loading 500 kilograms of goods, and there are roller conveyors and cargo fastening points on the floor.
The machine is equipped with two sets of hydraulic systems with a pressure of 207× 105 Pa. The electrical system includes: 28V DC with auxiliary power supply device. The leading edge of the main tail blade is provided with an electric heating anti-icing device. There is a cockpit booster. It is equipped with all necessary equipment for standard all-weather flight day and night, including 7A8 13 weather radar, map display, horizontal position indicator and automatic hovering system. GPS is optional. Integrated flight navigation system and automatic flight control system. Closed-circuit television cameras can be used to monitor cargo handling and cargo status in flight. The military model is also equipped with infrared suppressor, infrared jamming transmitter and infrared bait dispenser. At present, there are mainly the following types of Mi -26: Mi -26 military transport type, similar to the basic type of Mi -26. Mi -26A is equipped with PNK-90 integrated flight control and navigation system, which can automatically fly close to and land at the designated place. Mi -26T is a basic civil transport type, including fire-fighting type. The internal oil tank can be used to hold 15000 liters of fire extinguishing agent or hang 17260 liters of water. Geological exploration type, can carry 10000 kg measuring equipment, and can fly for more than 3 hours at an altitude of 55 meters to 100 meters and a speed of 180 ~ 200 kilometers per hour; The Mi -26 model with two cockpits was exhibited at the Moscow Air Show in 1997. Mi -26TS is similar to Mi -26T. Since 1996, Mi -26TS has been used in western countries to obtain airworthiness certificates and open up foreign markets, and its number is Mi -26TC.
M -26MS m -26T medical rescue model, which can arrange 4 wounded and 2 doctors to rescue the seriously wounded; Surgical rescue can arrange 1 wounded and 3 doctors; Preoperative rescue, can arrange two wounded and two doctors; For general ambulances, five stretchers, three seats for the wounded and two seats for medical staff can be arranged.
Mi -26P civil transport aircraft. It can carry 63 passengers, 4 people in a row, and there are toilets, kitchens and cloakrooms behind the cockpit.
Mi -26TM crane type, with commander pod behind the main wheel under the fuselage.
Mi -26TZ tanker can hold14040L fuel oil and1040L lubricating oil.
An improved version of Mi -26M is being developed. The main blades are all made of glass fiber reinforced plastic and adopt a new pneumatic structure. The new D- 127 turboshaft engine is adopted, with a single power of 10700 kW. The electronic flight instrument system improves the flight navigation system. The service limit is raised, the hovering height is increased, and the suspension load reaches 22000kg. It is reported that two prototypes, numbered Mi -27, have been manufactured.
Russian troops are equipped with 35 aircraft, and Mi-26s are also exported to more than 20 countries, including India (10), Ukraine (20), Peru (3), Kazakhstan and other countries.
1982 In February, Mi -26 set five world records for helicopter payload/altitude. Unit price1000 ~12 million USD (m -26TS, 1996 currency).
In June 2006, A. Rebas, Deputy Minister of Industry of the Russian Federation and representative of the Russian delegation attending the "Eurosatori-2006" exhibition, announced at the exhibition that France intends to jointly produce and improve heavy transport helicopters with Russia. At present, Russia has held a series of consultations with the French Ministry of Defence and Eurokopter on the joint improvement and joint production of Mi -26 helicopters. It is planned to sign the Mi -26 helicopter demonstration flight contract in France in the near future. Rebas pointed out that Russia regards joint research and development as the most important direction of military technical cooperation with Europe in the field of army weapons. As another direction of military technical cooperation, it is to jointly develop drones with Europe to support the army. The Russian Saturn Scientific Production Consortium and other companies will participate in the joint work of this plan and have signed an agreement to develop a new generation of engines for aircraft and drones.