Pratt & Whitney and Rolls-Royce weren't part of the 747-8 program, despite a long history with the 'Queen of the Skies'.
The final jumbo jet is exclusively powered by GEnx-2B engines, and was not built for Rolls-Royce or Pratt & Whitney turbofans ...
The biggest concern for Boeing was that, while chevrons were certainly effective at lowering engine noise, they also had the ...
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