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The Caudron C.39 was a French three engined biplane with a cabin for six passengers when the aircraft was equipped as a landplane or four passengers when on floats. It was flown with some success in competitions in 1920 and 1921. ==Design and Development== Between 1919 and 1922 Caudron built a series of multi-engined civil passenger transport biplanes of similar design but increasing size and engine power, the C.33, C.37, C.39, C.43 and C.61.〔 The C.39 and C.43 shared the same airframe but had three and five engines respectively.〔 The C.39 was a three bay biplane with fabric covered, rectangular plan wings mounted without stagger. The lower wing had dihedral outboard of the engines; it had a smaller span than the upper one which carried the ailerons, aerodynamically balanced by overhanging extensions beyond the tips. The wings were joined by vertical pairs of interplane struts, the forward members attached near the leading edges, and the centre section was supported by similar, shorter cabane struts from the upper fuselage. The inner bay was defined by two close pairs of leaning interplane struts, with a Clerget 9B nine cylinder rotary engines about half way between the wings. Each wing mounted engine was in a long, cylindrical cowling, open at the rear.〔〔 The third engine, another cowled Clerget 9 was in the nose; behind it the fuselage had a square section. The pilot and engineer had an open cockpit with its windscreen immediately under the wing leading edge.〔 The passenger cabin, long, wide and high, was lit by six small windows on each side and was accessed through a starboard-side door. Behind the wings the fuselage tapered gently to a broad, triangular fin which carried a vertical edged unbalanced rudder that reached down to the keel. The fabric covered tailplane had a straight leading edge with angled tips, and was mounted on top of the fuselage so its elevators had a notch for rudder movement.〔〔 In landplane configuration the C.39 had a fixed tailskid undercarriage. There were pairs of main wheels mounted on single axles attached at their centre to a longitudinal bar held under the engine at each end on short, forward raked V-struts. To prevent nose-overs, there was a fifth wheel mounted under the nose. The wheels could be replaced by flat bottomed floats, each fixed to the fuselage by two pairs of inverted W-struts, one to each side of the float, assisted by an inverted V-strut from the inside edge to the wing root. Though in floatplane configuration the C.43 sat level over the water, the tailskid was joined by a small, cylindrical float to protect the tail at take-off. In either configuration the undercarriage track was .〔〔 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「Caudron C.39」の詳細全文を読む スポンサード リンク
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