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Praga E-40
The Praga E-40 was a single engine, two seat, biplane basic trainer, built in Czechoslovakia in the mid-1930s.
==Design and development==
The E-40, one of several Praga trainer designs, was a single-bay biplane with open, tandem cockpits. The swept wings had twin wooden spars and a mixture of plywood and fabric covering. Ailerons were fitted to the lower wing and the upper wing had a cut-out on its trailing edge to enhance visibility from the forward cockpit. The N-form interplane struts were steel and the bay braced with streamlined wires. A pair of vertical N-form struts joined the wing centre section to the upper fuselage. The fixed tail surfaces were wood framed and plywood covered; the tailplane was strut braced from below. Elevators and rudder were fabric covered over steel frames. The rudder had a trim tab.〔
The fuselage of the E-40 was a steel structure, rigidly braced at the front and wire braced aft. The nose and the upper decking were covered with detachable steel panels; fabric covering was used elsewhere. Fuel and engine oil tanks were in the fuselage. The E-40 was powered by a four cylinder 63/71 kW (85/95 hp) Walter Minor air-cooled, inverted piston engine driving a two-blade propeller. It had a split type main undercarriage with wheels on V-form legs mounted just forward of the wing leading edge. Rubber-in-compression spring units were mounted in extended hubs; the pistons of these units were held in place on a shallow, inverted V strut, itself attached to the lower fuselage via a steel tube pyramid. The tailwheel castored and had rubber springing within the rear fuselage.〔
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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