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Aviation History
1958
1958 - 0374.PDF
Helicopters off the World .. 4fcove and left, M/-6. Lower left, Winicki heli- copter (designation un- known). Bottom right and immediately below, Kamov Ka-15. to the S-51, though its designer claims thatit has twice the gross weight, engine power and lifting capacity of the S-55. He furtherclaims that when the Mi-4 went into pro- duction at the end of 1952 it had no equalabroad—was, in fact, several years ahead of anything then being turned out byforeign manufacturers. Several variants are in operation. The normal militarymodel can accommodate the Soviet equi- valent of the jeep, a small car, a 75 mmanti-tank gun, or two motor-cycle sidecar combinations. Fourteen armed soldiersare another possible load. The variant used by Aeroflot is knownas the Mi-4P and seats ten passengers while providing ample space for luggage.This version is characterized by square— instead of round—windows, and there isno underslung gondola for the navigator, as on the military machine. The agricultural version is the Mi-4Sand the gondola is used in this model as a distributing point for chemicals. Spraybooms can be attached to the fuselage. Closely related to this aircraft is a specialfire-fighting development. The standard powerplant of the Mi-4series is the ASH-82V developing 1,700 h.p. Provision is made for blind- and night-flying, and there is an anti-icing system, as on the smaller Mi types. The four-bladed main rotor has hydraulic servo con- trol. A notable feature of the metal fuse-lage is the clamshell doors at the rear. A number of records have been estab-lished by Mi-4s, and on April 26, 1956, one of these machines attained a heightof 19,840ft with a load of two metric tons. This was not, however, quite a standardaircraft. • Rotor diam., 58.9ft; gross weight, 15,870 lb;typical load, 2,650 lb; max. speed, 130 ra.p.h. approx. Mi-6 This is the world's largest heli-copter, and in several respects (notably the geometry of the rear fuselage and tailboom) it resembles its smaller predeces- sors. The five-blade rotor is reminiscentof that of the Sikorsky S-56 and, together with its propulsion machinery, clearlyforms a self-contained unit to which could be attached a variety of fuselages or struc-tures suitable for "flying crane" applica- tions. The turbines are of the 4,700 h.p.TB-2BM type, with drive output shafts at the rear end. The engines are apparently
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