Patent ID: 8123489
Filing Date: 2012-02-28
Classification: B33Y,F01D,Y10T

Abstract:
1. A hollow aerofoil comprising an aerofoil portion having a leading edge, a trailing edge, a concave pressure surface wall extending from the leading edge to the trailing edge and a convex suction surface wall extending from the leading edge to the trailing edge, the concave pressure surface wall and the convex suction surface wall being integral and defining a cavity and a plurality of webs extending across the cavity between the concave pressure surface wall and the convex suction surface wall, wherein at least one of the webs extends substantially perpendicularly to the concave pressure surface wall and the convex suction surface wall and at least one of the webs extends substantially diagonally to the concave pressure surface wall and the convex suction surface wall, wherein some of the webs extending substantially diagonally intersect other webs extending substantially diagonally, and some of the webs extending substantially diagonally intersects two, or three, other webs extending substantially diagonally to form box structures.