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The Peyret Tandem, a.k.a. Peyret Alérion Tandem, was a French single seat glider of tandem wing configuration. It won first prize at the first British Glider Competition of 1922. ==Design and development== Louis Peyret, who had unsuccessfully attempted to fly the Blériot III floatplane and had designed the Blériot VI, a tandem wing aircraft, was a friend of Louis Blériot.〔 His post-World War I glider was a true tandem wing aircraft with two identical pairs of straight edged, constant chord high mounted wings, swept at 5°. Both also had 5° of dihedral but the front wing was mounted at a larger angle of incidence than the rear for longitudinal stability, as is the tailplane in a conventional aircraft. The wings were built up around tubular Duraluminum spars and braced with N shaped lift struts, also Duraluminum but with wooden fairings, which ran from the lower fuselage longerons to mid-span.〔 The fuselage was built around spruce longerons and struts with some plywood frames and covered with stress bearing 3-ply mahogany about 2.4 mm (0.094 in) thick. Unusually, there were five main longerons. In the central region of the fuselage four of them defined a deep rectangle but the upper two came towards each other together rearwards producing an isosceles trapizoidal section. A fifth longeron ran centrally above them, positioned so that the overall fuselage section was an isosceles triangle at the rear. Further forward, as the upper longerons separated, the fuselage had five flat faces. The side faces came together at the nose to form a vertical knife-edge and the bottom face curved upwards. The open cockpit was formed by a break in the upper skinning, though the fifth, upper, longeron continued over the pilot's head. Near the cockpit the upper skins were dished inwards to improve the pilot's view.〔 At the rear, above the second wing, was a small triangular fin which carried a rudder that extended to the bottom of the fuselage. The Peyret had a wider track and more refined undercarriage than many of the Itford gliders, with wheels on a single axle mounted below the fuselage on a combination of rubber shock absorbers and radius arms from the forward fuselage.〔 The control system was unusual. Both front and rear wings carried full-span control surfaces operated by a control column. Sideways movement of the column made the surfaces on both front and rear wings act together as conventional ailerons. Forward movement of the column lowered the control surfaces on the rear wing, as with conventional elevators, but also raised those on the front wing. Thus the tail was raised and the nose depressed. The rudder was operated by a conventional rudder bar.〔 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「Peyret Tandem」の詳細全文を読む スポンサード リンク
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