Pratt & Whitney has revealed
Pratt & Whitney has revealed details of the PW-EXX engine it is proposing for the Boeing 7E7. The 55,000-72,000-lb.-thrust successor to the PW4000 series will have a better than 10:1 bypass ratio and overall pressure ratio of 50:1. It also will feature a single-stage 108-in. fan, four-stage low...
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