| 摘要 |
A composite blade ( 26 ) comprises a root portion ( 36 ) and an aerofoil portion ( 38 ). The aerofoil portion ( 38 ) has a tip ( 42 ), a chord (C), a leading edge ( 44 ), a trailing edge ( 46 ), a suction surface ( 48 ) extending from the leading edge ( 44 ) to the trailing edge ( 46 ) and a pressure surface extending from the leading edge ( 44 ) to the trailing edge ( 46 ). The composite blade ( 26 ) comprises reinforcing fibres ( 52 ) in a matrix material ( 54 ). The aerofoil portion ( 38 ) adjacent the root portion ( 36 ) has regions ( 56, 58 ) at least at the leading edge ( 44 ) and trailing edge ( 46 ) comprising an asymmetric lay up of reinforcing fibres ( 52 ) and the aerofoil portion ( 38 ) adjacent the tip ( 42 ) having at least a region ( 62 ) at the mid-chord comprising an asymmetric lay up of reinforcing fibres ( 52 ).
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