CFM56最初的型号CFM56-2上风扇叶片为44个，之后的型号的风扇叶片数量有所减少，最新的CFM56-7型的风扇叶片数位22。英文维基百科上帮你查的，原句为：The original CFM56-2 variant featured 44 tip-shrouded fan blades, although the number of fan blades was reduced in later variants as wide-chord blade technology developed, down to 22 blades in the latest variant, the CFM56-7.
3个
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