Patent ID: 6234423
Filing Date: 2001-05-22
Classification: B64C

Abstract:
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:a spar interposed between said upper and lower skins at either one of edge portions thereof in said chord length direction and extended in a span-wise direction;a web formed in said spar and being approximately perpendicular to said both skins for making a space therebetween;a flange formed on both edge portions of said web for supporting said upper or lower skin so as to adequately and continuously mate with said upper or lower contour; anda protrusion integrally formed on said upper or lower skin for adhesively bonding said spar and said rib so as to effectively and economically maintain a sufficient strength against a peeling stress applied thereof.