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Aviation History
1926
1926 - 0638.PDF
SEPTEMBER 9, 1926 THE ALBATROS L.73 A German Biplane with Two 240 h.p. B.M.W. IV Engines WITH the raising of the restrictions hitherto placed by the Allies on German aircraft construction and operation, there is considerable activity of late in the German aircraft world, and several new types of commercial German machines, apart from those which took part in the recent seaplane competition at Warnemunde, have been produced, while others are rapidly carrier for the Berliner Zeiiung. That machine was designed in the main by Dr. Ing. Gustav Lachmann, who has now severed his connection with the Albatros Works and taken up a position in Japan. Herr Schubert, who has been chief designer of the Albatros firm for a number of years, and who visited, with Herr Robert Thelen, one of the earliest German The Albatros L. 73 : Three- quarter front view of the fuselage, showing centre-sections, wing-engine mountings, &c, The bracing of the top centre- section is un- usual, having no struts to the front spar. coming along. A German designer with his hands tied is one thing. A German designer at liberty to do as he likes is quite another, and there is every probability that during the next few years the German Aircraft industry will make a very determined effort to secure a leading place in com- mercial aviation. Germany is favourably situated geographi- cally for developing civil aviation, and it is no secret that, while they were prevented by the restrictions from doing very much actual construction, German designers and aero- nautical scientists were working hard in the drawing offices and laboratories against the time when Germany should once pilots, the Lympne light 'plane meeting in 1924, has recently turned his attention to twin-engined commercial aeroplanes, and the first of these to be produced is the Albatros L.73 which forms the subject of the following notes and illustrations. Requirements In designing the Albatros L.73 the following requirements were aimed at : the machine should have a useful load of 1,586 kg. (3,500 lb.) for a total engine power of 480 h.p., and should be able to carry this load with the greatest possible safety and reliability. Consequently the twin-engined THE ALBATROS L.73 : Three-quarter rear view. It will be noted that there is no fixed vertical fin, but that the rudder has a large horn balance. more be able to take its place among the nations of Europe. The results of the work thus quietly but no less seriously carried out should be felt during the next few years, and it therefore becomes a matter of no little interest to follow as closely as may be the steps by which Germany is building up her fleet of commercial aeroplanes. Some months ago we described and illustrated the single- engined biplane with slotted wings which was produced by the Albatroswerke of Berlin-Johannisthal as a newspaper arrangement was chosen, with the further proviso that the machine should be able to fly level and to manoeuvre with only one engine running. At the same time it was desirable that the take-off should not exceed 260 metres (850 ft.), and the machine should pull up in not more than 200 metres (660 ft.). The tank capacity should be sufficient for a radius of action of 560 km. (350 miles), and the cruising speed should be 140 km./h. (87 m.p.h.). (This is rather low according to British ideas of modern cruising speeds.—ED.) 562
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