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The PZL-5 was a Polish sport air aircraft of 1930 constructed and produced by the PZL. ==Design and development== The aircraft was designed in 1929 by an amateur designer Władysław Kozłowski. It was a wooden biplane, similar to de Havilland Gipsy Moth. The PZL State Aviation Works in Warsaw took over the design, searching for an aircraft to participate in a contest for a trainer aircraft, announced by the LOPP paramilitary organization (Air- and Anti-Gas Defense League). Kozłowski worked out a documentation, with a help of PZL bureau and fitted the example with a more powerful 100 hp Gipsy I engine, instead of a planned 85 hp version. The first prototype of PZL-5 was built and flown in May 1930, followed by two pre-series aircraft in June 1930, built on the factory's initiative specially for the International Touring Competition 1930 (''Challenge'') (registration SP-ACW and SP-ACX).〔Glass 1977, pp. 222–224.〕 After trials, the design was modified, receiving the designation PZL-5a. Among other changes, the fuselage and wings were shortened a bit, and the nose was modified. The first prototype was rebuilt this way, using a 94 hp Cirrus III engine, receiving the markings: SP-AEE. In 1931, a series of 11 aircraft were built, for aeroclubs' orders. They received markings from SP-AFF to SP-AFP and SP-AGF. Most had Gipsy I engines.〔 A price was 9,600 złoty (£380) for an airframe, plus 14,000 złoty (£560) for a Gipsy I engine.〔Cynk 1971, pp. 143–144.〕 The PZL-5 was too difficult to fly to be a basic trainer, consequently, a modified variant PZL.5bis was designed and built in 1932. It had a 120 hp Gipsy II engine, longer wings and fuselage, larger cockpit openings, changed tail and landing gear. The only prototype was flown in July 1932. It took part in a contest for the basic trainer aircraft for the Polish Air Force, but it was beaten by the RWD-8.〔 A further development of the PZL-5bis was the WK-3, built privately by Władysław Kozłowski and flown in 1933. The PZL also proposed in 1930 to build a trainer seaplane under a proposed designation PZL.8 (not to be confused with the PZL P.8), but the Polish Navy was not interested and it was not built.〔 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「PZL.5」の詳細全文を読む スポンサード リンク
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