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Aviation History
1920
1920 - 1287.PDF
DECEMBER 23, 1920 SOME DORNIER "MILESTONES The Do. Rs. IV, 1917-18THE first result of the experience gained with the Do. C. I was the construction of the next flying boat in the series,the Do. Rs. IV, which had this feature in common with the (Concluded from page 1273) the lines of the Rs. 111. even to the fuselage above the wing As already mentioned, however, the fuselage was braced by the metal covering, which was not the case in the Rs. III. The wing is braced above and below by cables, but it will be The Do. Rs. IV : Front view, showing top king posts. land machine that its fuselage was braced by the metal cover- ing only. (This machine was described and illustrated in FLIGHT of September 18, 1919.) As the illustrations will show, the Rs. IV is a monoplane flying boat with four engines placed between the boat hull and the monoplane wing. The four engines were 270 h.p. Maybachs, and drove tractor The Do. Rs. IV This boat is similar to Rs. Ill, but has king postsabove the wings. and pusher screws respectively. A feature claimed for this engine arrangement is that it is possible to attend to the engines during flight, while the fact that they are close together results in very small yawing moments when one engine cuts out. In general arrangement the Rs. IV, follows noticed that the Rs. IV has king posts on top, while the Rs. Ill had plain top bracing. The span in both cases was the same. It might be mentioned that at the same time as the building of the Rs. IV, work was progressing at Lindau on the develop- ment of metal floats for seaplanes, and such good results -were obtained that in the latest Dornier machines metal floats are employed exclusively, with, it is claimed, excellent results. One of the first machines to be fitted with these metal floats was The Do. Cs. I, 1918 Of this machine little information isavailable, except that which may be gleaned from an inspection of the accompanyingphotograph. She was, it will be seen, de- signed somewhat on the lines of the Hansa-Brandenburg monoplane seaplanes if which were such a familiar sight in the Korth Seaonce upon a time. That is to say she was a monoplane with the wings placed ^in theposition occupied by the lower wing of a biplane. The engine was a 195 h.p. Benz.and the machine was a two-seater, with a turntable for the rear gun and with twosynchronised machine-guns for the • pilot. This machine had the metal covered unbracedfuselage and all-metal floats, but from the fact that she does not appear to have been turnedout in quantities one presumes ithat she showed no advantage over existing types, atany rate not sufficient to supplant the Hansa- Brandenburg. The Do. D.I, 1918 Although being a land machine, and thus having no direct relation to the development of Dornier fiying boats, a machine produced early in 1918 is of more than ordinary interest, as being probably the first all-metal machine in the world in m .*" m m m m The Do. Cs. I : This machine was a twin float seaplane somewhat similar to the Hansa- Bran- r ._ denburg. >• I289 D
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