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Mil Mi-6: Difference between revisions
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== The real thing == | == The real thing == | ||
=== Engines === | === Engines === | ||
The engineers of the Mil design bureau used two Soloviev D-25B turbines to power the giant main rotor. Each of those engines produces 4100kW takeoff and 3505kW nominal output. Their air intakes are equipped with electric de-icing. | The engineers of the Mil design bureau used two Soloviev D-25B gas turbines to power the giant main rotor. Each of those engines produces 4100kW takeoff and 3505kW nominal output. Their air intakes are equipped with electric de-icing. | ||
=== Rotors === | === Rotors === | ||
To lift the 27 tons of helicopter plus up to 15 tons of cargo you don't just need strong engines but also an appropriate main and tail rotor. Appropriate in this case means that the 5-bladed main rotor has a diameter of 35m and turns at about 120 rpm. The resulting circumferecial speed is about 220 m/s. That does of course produce a lot of torque which needs to be counteracted. Therefore the Russian engineers mounted a massive four-bladed tail rotor of 6.3m diameter at the very far end of the helicopter in about 7m height. | To lift the 27 tons of helicopter plus up to 15 tons of cargo you don't just need strong engines but also an appropriate main and tail rotor. Appropriate in this case means that the 5-bladed main rotor has a diameter of 35m and turns at about 120 rpm. The resulting circumferecial speed is about 220 m/s. That does of course produce a lot of torque which needs to be counteracted. Therefore the Russian engineers mounted a massive four-bladed tail rotor of 6.3m diameter at the very far end of the helicopter in about 7m height. | ||
Both rotors have electric de-icing equipment. | Both rotors have electric de-icing equipment. | ||
=== Auxiliary Wings === | |||
The Mi-6 helicopter has two auxiliary wings mounted high over the center of the fuselage. They are tilted upward to the front and provide up to 20% more lift at cruise speed. However they get in the way when hovering, so variants of the Mi-6 helicopter that need to hover a lot, like the fire fighter, often have no auxiliary wings. | |||
=== Electricity === | |||
The principal electric circuit runs with 27 volts DC and is fed by two 12kW generators and a battery that ensures 30 minutes of autonomy in an emergency situation. There is also a three phase 360 volts (400Hz) AC circuit on bord for operating the radios and the de-icing equipment. This cirquit is fed by two alterators of 90 kVA each. The helicopter also features an auxiliary power group with an AI-8 gas turbine powering a generator of 24 kW. The auxiliary power group ensures that the engines are supplied with enough power for startup. | |||
== Related lists == | == Related lists == | ||