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Kawanishi K-8 Transport Seaplane
The Kawanishi K-8 Transport Seaplane was a Japanese single-engined floatplane of the 1920s. Seven were built in 1926 and 1927, and were used to operate airmail services.
==Design and development==
In early 1925, Eiji Sekiguchi, chief designer of the aircraft department of ''Kawanishi Kikai Setsakuho'' (Kawanishi Machinery Manufacturing Works), started work on a long-range floatplane for use by ''Nippon Koku K.K.'' the airline subsidiary of Kawanishi on airmail services. The resulting design, the Kawanishi K-8A, was a single-engined monoplane with a fabric covered wooden structure. It was powered by a Maybach Mb.IVa water-cooled inline-engine, as used in Kawanishi's successful K-7 biplane, but was larger and heavier than the K-7. The aircraft was fitted with a twin-float undercarriage, while the crew of two sat in open cockpits. The first prototype was completed in January 1926 with a shoulder-wing layout, but following aircraft had the wing raised to a parasol wing arrangement. The aircraft demonstrated relatively poor performance, but showed good stability, making it popular for long-distance flights. A total of 5 K-8As were completed in 1926, all going to ''Nippon Koku K.K.''.
The design attracted the attention of the ''Teiko Kaibo Gitai'', (the Imperial Maritime Defence Volunteer Association), a patriotic organization, who placed an order for two modified aircraft, the Kawanishi K-8B, with reduced span wings, a slimmer fuselage and the crew cockpits moved rearwards. These two aircraft were completed in 1927, demonstrating improved performance.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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