Dewoitine D.14 The Dewoitine 14 was a mid-1920s French civil transport, capable of carrying mixture of passengers and freight . The sole example was used in commercial trials.Dewoitine aircraft, gliders and ultralights apart, had generally been metal-framed but the all-wood D.14 was an exception. Designed as a civil transport, it could carry up to six passengers or a mixture of passengers and freight. It was a high wing monoplane with a two part, straight-edged, unswept wing of constant chord out to angled tips. Each half-wing was built around two spars and was fabric covered . On each side a pair of faired struts braced the spars to the lower fuselage longerons . Its overhung ailerons were aerodynamically balanced . The D.14 was powered by a Lorraine 12E Courlis W12 engine , water-cooled with a pair of Lamblin radiators. Part of the fuel was in wing tanks and part in the fuselage. The engine was enclosed under a closely fitted cowling which followed the three banks of cylinders. Behind the engine the fuselage had a rectangular cross-section defined by four longerons. The pilot's open cockpit , offset to port, was in the wing leading edge . The central, windowed part of the fuselage contained passengers and freight and was divided into three compartments . The forward one, under the wing, could either be given over to freight or contain two passenger seats. A central compartment provided four seats and the rearmost contained a toilet and had separate entry doors to the cabin and a baggage hold . The empennage was conventional with a swept, straight-edged tailplane mounted on top of the fuselage and a triangular fin . Both rudder and elevator were balanced, the latter with overhung tips like those of the ailerons. The D.14 had conventional, fixed landing gear . A pair of V-struts, splayed slightly outwards, were attached to the lower fuselage longerons and supported a rigid axle, with the mainwheels apart. The forward components of the V-struts were telescopic, with shock absorbers and coil springs inside their streamlined fairings.Operational history The D.14 first appeared in public , still unflown, at the Paris Aero Salon held in December 1924 . In January it was at Villacoublay , with trials scheduled to begin in the week starting 20 January . It had flown by 4 February 1925 . In December 1925 the D.14 was about to start commercial trials with CIDNA , fitted with a Farman 12We W-12 engine . The following May it was tested at Toussus-le-Noble , its performance reported as "much improved" because the geared-down Farman engine had allowed a larger diameter propeller to be fitted. In August 1926 it was at Villacoublay, still with this engine, now reported as delivering .Specifications
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