There are many things that composites take away from aerospace—weight, corrosion, part count, manufacturing complexity—and many that they give, such as stiff, strong structures that open the door to innovative, easier-to-maintain designs. Boeing has been the big leader in composite airframes, but in propulsion, GE Aviation has been out front. With its own innovations, Snecma, its partner in the CFM International engine alliance, has joined GE in that leadership role. On engines as ...


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