| 摘要 |
A rotor blade main body (37) includes multiple first composite sheet groups (51) and multiple second composite sheet groups (53) which are provided in a blade thickness direction (TD). Each first composite sheet group (51) includes multiple composite sheets (49) which are stacked one on another from a blade thickness center (TC) side toward a dorsal surface (39). Each second composite sheet group (53) includes multiple composite sheets (49) which are stacked one on another from the blade thickness center (TC) side toward a ventral surface (41). A composite direction (CD) of orientation directions of fibers in the multiple composite sheets (49) in each of the sheet groups (51, 53) inclines by 20 degrees to 45 degrees from a span direction (SD). |
