![]() ![]() The He 51 was intended to replace the earlier Arado Ar 65, but served side-by-side with the slightly later Ar 68. It was powered by a glycol-cooled BMW VI engine, with an armament of two 7.92 mm (.312 in) machine guns mounted above the engine. The He 51 was a conventional single-bay biplane, with all-metal construction and fabric covering. Deliveries started in July of the next year. ![]() The type was ordered into production for the still secret Luftwaffe as the He 51, the first pre-production aircraft flying in May 1933. The first prototype, the He 49a, flew in November 1932, and was followed by two further prototypes, the He 49b, with a longer fuselage, and the He 49c, with a revised engine. While this was officially an advanced trainer, in fact it was a fighter. In 1931, Heinkel recruited the talented aircraft designers, Walter and Siegfried Günter, and their first major design for Heinkel was the Heinkel He 49. ![]()
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