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Koolhoven FK.47
The Koolhoven F.K.47 was a 1930s one-off two seat biplane designed and built in the Netherlands for an individual customer as a sport and touring aircraft.
==Design and development==
The F.K.47 was specifically built for H.L. Jonker Roelants as a sports tourer and registered in his name in June 1933. It had much in common with the early version of the Koolhoven F.K.46 sport and training aircraft, which first flew four months later. Both were two seat, single bay biplanes, with equal span, unswept wings of constant chord and strong stagger, braced with N-form struts. The upper wing of the F.K.47 was held above the fuselage primarily by a pair of short, outward leaning N-form cabane struts to the upper fuselage longerons. There was a shallow rounded cut-out in the trailing edge of this wing to enhance the upward view from the forward cockpit.〔
The F.K.47 was powered by a 130 hp (97 kW) de Havilland Gipsy Major air-cooled inverted inline engine, driving a two blade propeller. The fuselage had a rounded decking with the forward cockpit placed under the upper wing trailing edge and the aft one just behind the lower wing edge. Both cockpits were open. Aft, the fin was quadrant-shaped with a vertical rudder. The undercarriage was conventional, with the mainwheels on cantilever tube, faired legs, assisted by a tailwheel.〔
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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