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The Blériot-SPAD S.56 was a family of prototype French airliners developed in the 1920s as various refinements of the S.33 design. All S.56 versions shared two new features: the first was a newly designed, all-metal wing, replacing the wooden wing of earlier related designs and the second was a redesigned passenger cabin, replacing the S.33's four single seats in a row with two rows of double seats. A second access door was also added. ==Variants== ;S.56/1:basic version with Salmson CM.9 radial engine and later a Gnome & Rhône 9Aa, (1 built) ;S.56/2:similar to the S.56/1, with a Gnome & Rhône 9Ab engine, (1 built). ;S.56/3:similar to S.56/2 with improved landing gear and Gnome & Rhône 9Aa engine. (8 built) ;S.56/4:major fuselage revision; cockpit relocated between engine and passenger cabin (in all previous S.33 derivatives, it had been aft of the cabin) and an extra double seat added to the cabin, increasing internal passenger capacity to six. 8 built, plus 2 modified from S.56/3s, powered by Gnome & Rhône 9Ady engines. ;S.56/5:revised passenger cabin with four seats located in one compartment, and two in a second compartment that could be quickly converted to a freight hold (3 modified from S.56/3s) ;S.56/6:similar to S.56/3 but customised for banner towing for the Air Publicité company, powered by a Gnome & Rhône 9Ab engine. This aircraft ended up as a transport plane in the Spanish Republican Air Force during the Spanish Civil War.〔(Aircraft that took part in the Spanish Civil War )〕 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「Blériot-SPAD S.56」の詳細全文を読む スポンサード リンク
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