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The Junkers J 2 was the first all-metal aircraft intended as a dedicated military aircraft design, the first all-metal aircraft meant to be a fighter aircraft, and was the direct descendant of the pioneering J 1 all-metal aircraft technology demonstrator design of 1915. ==Background== Only some two weeks after the last known recorded flight, on 18 January 1916, of the J 1 "technology demonstrator" design of 1915, the Junkers firm had impressed ''Hauptmann'' Felix Wagenführ, head of ''IdFlieg'' ''Prüfanstalt und Werft der Fliegertruppe'' ("Test Establishment and Workshop of the Aviation Troops") department, enough for him to contract the Junkers firm to build six all-metal monoplanes, intended as fighter prototypes. Each was to be powered by the Mercedes D.II inline engine (as the J 1 had been), and armed with one 7.92 mm (.312 in) lMG 08 ''Spandau'' synchronized machine gun. The aircraft were allocated ''IdFlieg'' serial numbers E.250/16 to E.255/16. The specification was for an aircraft that had: * a top speed of 145 km/h (90 mph) * a flight duration of 90 minutes * a climb rate to 3,000 m (9,840 ft) altitude within 20 minutes. The contract also specified that "the greatest maneuverability and nimbleness in flight must be achieved by the aircraft", expressing a possible concern of the German governmental agency concerning the use of the heavy electrical steel sheet that made up the earlier J 1's structure. Junkers began wind tunnel and design work promptly upon receipt of the contract, and by the end of the spring of 1916 the first example was completed. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Junkers J 2」の詳細全文を読む スポンサード リンク
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