"Reinvent the 737" is a horrible way of putting this. They used the 737 and 777 has baselines/references of their design goals. Perhaps they based some of the f

"Reinvent the 737" is a horrible way of putting this. They used the 737 and 777 has baselines/references of their design goals. Perhaps they based some of the fuselage/wing work on the existing planes, but they are so different, you could say they reinvented any two engine passenger liner built since the 737. These designs also rely on some very advance (for commercial jets) engines. PW was involved in the engine redesign of this project, so I imagine the numbers they pulled out for increases in efficiency, while optimistic, are not pulled out of their ass, and definitely achievable. One of the things they're trying to to shift towards lean burning (so more oxygen than required for "complete" combustion), to reduce pollutants. They also want to use thrust vectoring in their hybrid wing concept, which I guess would do wonders for runway length requirements. Regardless of how feasible actually getting these into production (imagine Boeing actually redesigning one of their planes based on what some outside source came up with... at the very least, it would be completely reinvented in house at Boeing... well, that's my guess anyways), it's nice to see how much detail they put into this. They even went to try to reduce vortices at takeoff/landing so you could cycle planes faster through a runway.