Pratt & Whitney And Rolls-Royce Downplay CFM Open-Fan Threat

Pratt & Whitney test engine with shorter inlet
Shorter inlets, like this Pratt & Whitney test unit, are under study to further improve ducted-turbofan efficiency.
Credit: Pratt & Whitney
Absent for 20 years, open-rotor engines are back on the power agenda for next-generation single-aisle aircraft. What does that mean for the future of conventional turbofans, geared or otherwise, and how might that technology influence the trajectory of tomorrow’s large-engine designs? These and...

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