Pratt & Whitney engineers maintain that the United Technologies division bet the company on its geared turbofan (GTF) departure from conventional engine design because it promotes better optimization of shaft speeds and allows the fan to turn at lower rpm to reduce noise. While developing variants of the PW1000G GTF for the Mitsubishi MRJ, Bombardier CSeries, Airbus A320 NEO, Irkut MC-21, and Embraer 170 and 190 airliners, Pratt has announced that that it is extending the technology ...


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