Composite blade and method of manufacturing composite blade

A method of manufacturing a composite blade that includes an airfoil extending in a longitudinal direction, and a blade root including a straight section that is a section from a blade end part being a connection location with the airfoil to an inclination start part being a location between the blade end part and a base end, and a bearing section that is a section from the inclination start part to the base end, the method comprising:

• forming a laminate, by laying up composite layers in which reinforced fibers are impregnated with resin, across the airfoil and the blade root;
• forming a metal body that is provided on the blade root, and
• providing an adhesive layer between the metal body and the laminate to bond the metal body and the laminate,
• wherein the forming of the laminate includes forming the laminate such that the laminate extends along the longitudinal direction in the airfoil, extends along the longitudinal direction in the straight section, and extends so as to be inclined in a direction away from a center axis along the longitudinal direction of the airfoil toward the base end of the blade root in the bearing section,
• the forming of the metal body includes forming the metal body such that the metal body is provided on one surface and another surface of the laminate in the blade root, extends along the longitudinal direction in the straight section, and extends so as to be inclined in a direction away from the center axis toward the base end in the bearing section, and such that an angle of a surface of the metal body on an opposite side to the laminate in the bearing section with respect to the longitudinal direction is greater than an angle of a surface on the laminate side in the bearing section with respect to the longitudinal direction, and
• the forming of the metal body is performed such that, on a surface on an adhesive layer side at the straight section, the metal body includes a notch part that is provided across a notch start part and the blade end part, the notch start part being between the inclination start part and the blade end part, the notch part having a depth increasing from the notch start part toward the blade end part.