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Aviation History
1956
1956 - 0444.PDF
444 PLIGHT THE First Disclosure of the Technical Characteristics of a Russian Helicopter THREE-TO-FIVE-SEAT helicopters are at present in wide-spread use all over the world as main utility types. In theU.S.S.R. helicopters of this class are exemplified by Mi-1 designed by Mikhala Milla. This helicopter has now been used since 1951 for a variety of duties, including postal service, communications, ambulance, rescue, liaison, air inspection of high-voltage cross-country trans- mission lines, etc., in various regions of the Soviet Union in many southern and northern republics. Constructional layout of the helicopter is of typical Yuriev configuration. The fuselage con- tains the cockpit, powerplant, fuel and accessories, with a tail boom attached to it. From the constructional point of view the fuselage and the tail-boom are of completely different design. The fuselage is a tubular frame tp which covering metal skin is attached, whereas the tail-boom is a conical structure of semi-monocoque design, with rings and longerons. Undercarriage legs, with oleo-pneu- matic shock absorbers to all three wheels, are fitted to the joints of the fuselage frame, the nose wheel being steerable. In the cockpit is a pilot seat and a bench for three passengers. Flying controls, including cyclic- and collective-pitch levers, THE Tu-104 and Mig-15 excepted, reliable structural details of Russianaircraft are hard to come by. We have therefore prepared drawings, and a direct translation, from a description of the Mi-1, a helicoptercomparable with the Sycamore or Dragonfly. The overall progress made by Russia in the helicopter field is extensive. In addition to thiscomparatively modest aircraft, large numbers of more capable machines are already in service. One of these, with the Western code-name"Hound," resembles the S-55; another, code-named "Horse," is gener- ally similar to the Bristol 173. A "Horse" recently lifted two metric tonsto 5,082 m (over 16,000ft) and 4 metric tons to over 2,000 m. throttle, brake and clutch levers are adjacent to the pilot's seat, in front of which is situated the instrument panel. On the latter are placed all the flying and navigational instruments, engine-speed indicators and all the change-over switches of the electrical and radio system. Radio equipment itself, including receiver and transmitter, is fitted in the extreme nose, except for the inverter and radio-altimeter, which are placed at the rear of the main fuselage. A wire aerial is stretched over the roof and radio- altimeter aerials are situated under the tail boom. The importance of the radio-altimeter cannot be over-estimated since it enables landings to be made in very bad visibility. Large glazed panels
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