As General Electric’s newest commercial engine—GE9X—is readied for service, the company’s venerable CF6, its very first high-bypass-ratio turbofan, is experiencing an unlikely comeback. Surging air cargo growth, a renaissance in classic widebody freighters and the possibility of a new reengining program are behind this revival.  Based on the core of the TF39, the world’s first high-bypass engine developed by GE in the 1960s for Lockheed’s C-5, the ...


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