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Aviation History
1953
1953 - 0116.PDF
H4 FLIGHT, 23 January 1953 The World's Helicopters WEIGHTS 2,500 lb to 6,000 lb (ami.) Russian helicopters (designation unconfirmed). BREGUET TYPE III • With its co-axial rotors, this four- seat French helicopter—a product of the Societe Anonyme des Avions Louis Breguet, of 24, Rue Georges-Bizet, Paris (XVIe)— affords an interesting comparison with the American Gyrodyne G.C.A. 2C, particularly as both machines are powered with a Pratt and Whitney Wasp Junior engine of 450 h.p. The fuselage is a metal monocoque structure, the rear section of which is detachable to permit work on the engine. Two stretchers can be taken as an alternative load to the three passengers. Rotor diam., 31ft 6in; weight empty, 3,250 lb; weight loaded, 4,650 lb; max. speed, 133 m.p.h.; cruising speed, 107 m.p.h.; range, 290 miles. S.E.3120 ALOUETTE • Though classed as a multi-purpose helicopter, this three-seater, which is built by the Societe Nationale de Constructions Aeronautiques du Sud-Est, of 6, Avenue Mar- ceau, Paris (Vllle), was planned from the outset with agricultural applications particularly in mind. The makers, in fact, are fond of describing it as a flying agricultural machine rather than a flying machine utilized for agriculture. The power unit is a 200 h.p. Salmson 9NH radial, and the three blades of the rotor can be folded. Spraying or dusting tanks are attached to the sides of the fuselage or, should the machine be employed in other than the agricultural role, two passengers or two stretcher cases can be carried in addition to the pilot. Although first tested with a three- wheel undercarriage (the three wheels being identical and each using the same type of shock-absorber strut), the Alouette was demonstrated in Paris last year with a wide-track skid-type gear, as shown in the photograph at the foot of the page. Rotor diam., 38ft; weight empty, 1,630 lb; gross weight, 2,550 lb; max. speed, 81 m.p.h.; cruising speed, 68 m.p.h.; endurance (equipped for agricultural spraying), 1 hr 30 min; range (with auxiliary tank), 340 miles. S.O.1220 DJINN • This is the newest helicopter to be announced at the time of going to press. A product of the Societe Nationale de Constructions Aeronautiques du Sud-Ouest, of 105, Avenue Raymond-Poincare, Paris (i6e), it is a single-seater and the rotor is driven by a Turbomeca Palouste. There is no combustion in the blades. The empty weight is 550 lb and the exhaust nozzles in the blades are said to be noiseless. No further particulars are to hand as we go to press. S.O. 1120 Ariel III. S.E. 3120 Alouette. S.O.i 120 ARIEL III • This turbine-powered helicopter attracted a great deal of favourable comment when it first appeared at the Paris Salon of 1951. It is a three-seater and is driven by a Turbomeca Arrius turbine compressor of 275 s.h.p. This supplies air through the hub of the rotor to the small combustion chambers fitted at the blade tips. Orientation of the turbine exhaust by a number of small flux gates located at the rear of the fuselage, and operated directly by the rudder, gives full directional control. It is claimed that cost is much reduced in that there is no compli cated transmission system or tail rotor. The fuselage is of light- alloy construction and, as will be judged from the photograph, the machine is of particularly neat appearance. Rotor diam., 35ft 5in; weight empty, 1,500 lb; gross weight, 2,750 lb; cruising speed, 105 m.p.h.; service ceiling, 14,400ft; range, with 660 lb disposable load, 155 miles. The Ariel III is a development of the S.O.noo Ariel I and S.O.i 110 Ariel II. Both these machines had a Mathis piston engine driving a compressor which fed air to the combustion chambers mounted at the tips of the rotors. RUSSIAN HELICOPTER • Generally credited to Mikhail Mil, this aircraft, the external characteristics of which are visible in the photograph, first appeared in public at Tushino in 1951. No information on performance or other characteristics has been forthcoming.
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