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Aviation History
1927
1927 - 0844.PDF
NOVEMBER 3, 1927 A GERMAN NEWSPAPER CARRIER The Heinkel H.D. 40 THE chief of the Heinkel Aircraft Works, Ltd., of Warneniunde, Dr. Ernst Heinkel, is one of the pioneers of German aviation, having been actively engaged upon aircraft design and or construction since the early days of aviation. In recent years, Dr. Heinkel has been rather less in the public eye, but has nevertheless been working along quietly and steadily. He has produced several aircraft types of late, and the machine which forms the subject of the following descriptive notes is the latest of which particulars have become available. The new Heinkel biplane, known as the type H.D.40, was specially The Mat-sided fuselage is of welded steel tube construction, with four tubular longerons, to which are welded the vertical and horizontal struts, the bracing being by wire in the rear portion, and by diagonal welded-m tubes in front, where local considerations demand the more rigid arrangement. Covering is by fabric, except in the nose and neighbourhood of the pilot's cockpit, where aluminium is used. The fabric is so attached by lacing that it can be readily removed for purposes of inspecting the fuselage structure. The engine support is in the form of a steel tube unit, attached to the fuselage proper The Heinkel H.D.40 Commercial Aeroplane : Front View -designed to carry newspapers, and a fairly high cruising speed was desired (about 100 m.p.h), but a very simple alteration enables the machine to be converted into a passenger carrier. Apart from its technical features, the Heinkel is mainly of interest on account of the fact that it is fitted with one of the new B.M.W, engines, of 500-600 h.p., and is thus one of the most powerful single-engined German civil machines of recent years. The Heinkel H.D. 40 is a development of, and somewhat Harger, as well as more powerful than, the Heinkel H.D.39, by four bolts only. The fuselage itself terminates in front in a fireproof bulkhead, and it is to the four corners of this that the engine unit is bolted. The pilot's cockpit is under the top plane, and contains two seats placed side by side. Access to the cockpit is through a door in the side of the fuselage, and the usual instrument board is provided. In addition, the cockpit is equipped with dual controls, as well as with the duplicate mechanism for discharging the newspapers, this being so arranged that it can be operated either by the pilot or by the engineer. The |BfflMB|HPF ~ ^B [•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••^ .. ^•-.,-,. ^^^^^H The Heinkel H.D.40 Commercial Aeroplane : Three-quarter rear view. 46E-6C0 h.p. The engine is a B.M.W. VI of which was also a newspaper carrier designed for the famous publishing firm of Ullstein, of Berlin. Whereas the H.D.39 was equipped with the B.M.W. IV, the H.D.40 is, as already- stated, fitted with the B.M.W. VI engine. Aerodynamically the new machine is a fairly normal biplane, with but a single pair of struts on each side. Constructionally, it is of the mixed type, in that the fuselage is of welded steel tube construction, while the wings are of all-wood construction with three-ply covering. Light metal is used for lightly-stressed or non- stressed parts only. cargo space for the newspapers is situated underneath the cockpit, and measures 1-2 /. 1-4 • 1-0 m. (3 ft. 9 in. > 4 ft. 7 in. x 3 ft. 4 in.). If it is desired to use the H.D.40 as a passenger machine, the newspaper space can be used for luggage, the release mechanism being, of course, then removed. Behind the cockpit and newspaper space is the cabin proper, which may be used for carrying more news- papers, or, by fitting seats, it can be turned into passenger accommodation (6 to 8 seats). This space measures 1-8 / 1-2 X 3 0 m. (5 ft. 10 in. x 3 ft. 9 in. x 9 ft. 9 in.). In 760
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