The Jaguar D-Type is a sports racing car that was produced by Jaguar Cars Ltd. between 1954 and 1957. Although it shares many of its mechanical components with the C-Type, including the basic straight-6 XK engine design (initially 3.4 litres and uprated to 3.8 litres in the late fifties), the structure of the car was radically different.
The innovative monocoque construction brought aviation industry technology to competition car design, together with an aeronautical understanding of aerodynamic efficiency. The structural design, revolutionary at the time, applied aeronautical technology. The “tub”, or cockpit section, was of monocoque construction, mostly comprising sheets of aluminium alloy. Its elliptical shape and comparatively small cross-section provided torsional rigidity and reduced drag.
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