| 摘要 |
The invention is intended to reduce the drag caused by a complex-section part in an airflow, for example the landing gear of an aircraft, making it possible to optimise the lift/drag ratio and to reduce the aerodynamic noise by reducing the local noise source combined with a global optimisation of the aeroplane related to the reduction in drag. To do so, the invention provides for the shaping of the complex part, masking its form with a special casing. According to one embodiment, the aero-acoustically optimised complex-section metal mechanical part is fitted with an aerodynamically shaped cover made of several longitudinal parts articulated with hinges to facilitate their installation. This cover is attached to at least two supports placed away from one another along the axis of the part, each support is bolted to the cover and mates with the section of the part. The external face of the cover is cylindrical and its internal face bears against the supports. The cover advantageously has a translucent part beside the walls of a remaining opaque part. Stops are provided on the part to limit the translational movement of the cover.
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