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AssigneeJapan Aircraft Development Corporation
InventorsMakoto Hirahara, Yasuo Isano, Ryuhei Shimizu, Kazuaki Amaoka
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A box-structure airfoil is constructed of a composite material upper skin, a composite material lower skin 12 and a spar. Ribs and an elongate projection are formed integrally on the inner surface of each of the two skins. The upper and lower skins and the spar are simultaneously bonded by an adhesive to form a single structure. Since the ribs and the elongate projection are one-piece formed with each skin, it is possible to reduce the number of principal constituent components. Furthermore, since assembly operation is made by using the adhesive, there is no need for fasteners or the like for assembling. Moreover, the spar is bonded not only to Moreover, because not only a web but also flanges on both sides of the spar are bonded to the respective skins, it is possible to obtain a large strength. According to the invention, it is possible to reduce the number of principal constituent components and that of assembling components of an airfoil, thereby achieving its cost reduction.
A composite material airfoil structure comprising:
A method of forming a composite material airfoil structure, said method being characterized by comprising:
A method of forming a composite material airfoil structure, said method being characterized by comprising:
An airfoil structure made from a composite material, having, an upper skin made from said composite material for forming an upper contour of said airfoil structure and for extending in a chord length direction, a lower skin made from said composite material for forming a lower contour of said airfoil structure and for extending in said chord length direction, and a rib interposed between said upper and lower skins and arranged in said chord length direction for supporting thereof, comprising:
Dependencies are inferred from the claim text.