Unmanned
Both RR and P&W pitched engines for the 777-300ER/-200LR: RR actually tested a Trent at 110,000lb years ago. It was strongly rumoured at the time that the single source award had nothing to do with the technical aspects of the various proposals rather the promise of financial assistance to Boeing by GE to develop the airframe if they selected the GE90 on an exclusive basis. The amount was rumoured to be approx $500m but I'm sure 747FOCAL could enlighten us. Given the sales records of these models to date one has to question whether Boeing was wise to take GE's shilling.
