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The Potez 53 was a racing aircraft built in France by Potez to compete for the in 1933.〔Taylor 1989, p. 748.〕 ==Design and development== The Potez 53 was a low-wing cantilever monoplane of conventional design with an enclosed cockpit for the pilot.〔"Coupe Deutsch" 24 May 1934, p.510.〕 The main units of the tailskid undercarriage retracted outwards into the undersides of the wings (There is something wrong here—maybe "and" left out. BAB) .〔 It was powered by a supercharged nine-cylinder Potez 9B radial engine driving a two-bladed fixed pitch propeller. The engine was specially designed for the competition, which called for engines of less than displacement.〔NACA Technical Memorandum no.724: The 1933 contest for the Deutsch de la Meurthe trophy〕 Two machines were entered for the 1933 Coupe Deutsch de la Meurthe.〔De Narbonne 2003.〕 The first (racing no.10) was flown by Georges Détré, who won first place, covering the closed-circuit course with an average speed of .〔〔Taylor 1989, p. 749.〕 The other (racing no.12) was flown by Gustave Lemoine, who retired after completing the fourth lap.〔 Following this success, a new machine designated the Potez 533 (or 53-3) was built with various improvements for the 1934 race, including an uprated engine delivering driving a Ratier variable-pitch propeller, slimmer and more streamlined fuselage and redesigned wings of increased area.〔〔"The 1934 contest for the Deutsch de la Meurthe trophy", p.18.〕 One of the two aircraft entered the previous years was refurbished as the Potez 532 (or 53-2), to act as a backup in the competition. The engine was uprated, its fuselage was slightly lengthened for aerodynamic reasons, the wing was further enlarged and additional flaps were installed between the fuselage and ailerons.〔〔 The two aircraft were flown by the same pilots as the previous year, but neither completed the 1934 race.〔"Coupe Deutsch" 31 May 1934, p.531.〕 Gustave Lemoine, who was flying the Potez 533 (racing no.3), completed ten circuits with an average speed before being forced to withdraw due to a problem with the variable-pitch propeller.〔 Georges Détré, who was flying the older machine (racing no.1), completed only eight circuits before a broken oil pipe forced him to abandon the race.〔 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「Potez 53」の詳細全文を読む スポンサード リンク
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