As the industry grapples with the reality that gas turbines remain the only viable powerplant in widebody airliners for decades to come, Rolls-Royce has sketched out a long-term road map to evolve its next-generation UltraFan into a more electric, lower-emissions engine. Although battery-powered, turbine-based hybrid and turbo-electric concepts are already in preliminary development for small and regional transports, the path toward electric and hybrid-electric power for larger ...

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