Patent ID: 8172542

Claim:
A wind turbine blade comprising a laminated structure which comprises an outer shell having a shape of the blade, an upwind-side reinforcing section which reinforces a upwind-side part of the blade in the outer shell and a downwind-side reinforcing section which reinforces a downwind-side part of the blade in the outer shell, wherein the outer shell comprises a first multidirectional material, a first unidirectional reinforcing material and a second multidirectional material which are layered, wherein the upwind-side reinforcing section comprises a second unidirectional reinforcing material provided between the first unidirectional reinforcing material and the second multidirectional material, wherein the downwind-side reinforcing section comprises a third unidirectional reinforcing material provided between the first unidirectional reinforcing material and the second multidirectional material, wherein the outer shell comprises a first core member, respectively provided between the upwind-side reinforcing section and the downwind-side reinforcing section on a leading edge side, and between the upwind-side reinforcing section and the downwind-side reinforcing section on a trailing edge side, and wherein the blade comprises the laminated structure from a root of the blade to vicinity of a maximum chord location at which a chord is maximum and the blade comprises other laminated structure from the maximum chord location to a tip of the blade.