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FBA Type A
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The FBA Type A and the similar Type B and C were a family of reconnaissance flying boats produced in France prior to and during World War I. All three were unequal-span pusher biplane flying boats with a single step hull made of ash longerons covered in laminated wood, divided by bulkheads into eight compartments. The empennage was carried on an upswept curved extension of the hull made from steel tubing. The pilot and observer sat side by side in the open cockpit.〔Taylor 1989, p. 381.〕
==Development==
The design originated with patents by Donnet-Lévêque and initially reflected the general configuration of that company's aircraft.
The Type A had a single-bay wing, while the larger Type B and C had two bay wings which otherwise only differed in the engine installed, with the type B using a Gnome Monosoupape and the type C using a Clerget 9B. The RNAS contracted for 20 type B's from Norman Thompson, who was responsible for building flying surfaces for hulls provided from France, which differed most noticeably by having a rectangular all-flying rudder in place of the D shaped rudder used on French examples. The Type A was the only version with a fin attached to the rudder although some aircraft had a field modification with a fin being added between the hull and the tailplane. The Type H was developed from the Type C but was larger, had a new hull that wasn't attached directly to the tailplane, had an oval rudder and used a Hispano-Suiza 8 stationary engine.
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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