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Hansa-Brandenburg D.I : ウィキペディア英語版 | Hansa-Brandenburg D.I
The Hansa-Brandenburg D.I, also known as the KD (''Kampf Doppeldecker'') was a German fighter aircraft of World War I. Despite poor handling, it was built for Austria-Hungary, some aircraft serving to the end of the war. ==Development and design== Ernst Heinkel chief designer of the Hansa und Brandenburgische Flugzeug-Werke developed the KD in 1916 to meet the requirements of the Austro-Hungarian Air Force (''Kaiserliche und Königliche Luftfahrtruppen ''or'' K.u.K. Luftfahrtruppen''). It was a single seat, single engined biplane, of wooden construction, with plywood fuselage skinning and fabric wing skins. The wings featured an unusual "Star-Strutter" arrangement of interplane struts, where four Vee struts joined in the centre of the wing bay to result in a "star" arrangement. The interplane struts themselves were steel tubes.〔Green and Swanborough 1994, p.83.〕 The KD had a deep fuselage, which gave a poor forward view for the pilot and tended to blanket the small rudder, giving poor lateral stability and making recovery from spins extremely difficult.〔Gray and Thetford 1962, p.64.〕 Armament was a single Schwarzlose machine gun, which owing to difficulties in synchronising the Schwarzlose, was fitted in a fairing on the upper wing, firing over the propeller.〔Williams and Gustin 2003, p.62〕 Despite these handling problems, the aircraft was ordered by Austro-Hungary as the D.I. A total of 122 D.Is were built, with 50 built by Hansa-Brandenburg in Germany - powered by 110 kW (150 hp) Austro-Daimler engines - while a further 72 were built under license by Phönix in Vienna, powered by 138 kW (185 hp) Austro-Daimler engines. While it was intended that the D.I also be built by Ufag, none were delivered.〔Silen, Art. (IPMS Book Review: Albatros Productions, Ltd Windsock Datafile #118 Hansa Brandenburg D.1 ) ''IPMS USA''. Retrieved 2 March 2008〕 The KD also formed the basis for the Hansa-Brandenburg KDW floatplane fighter.
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