Originally Posted by
Hartington
But that doesn't answer the question. I focused on the 737 but Boeing re-engined the 747 at least three times, stretched it twice etc.
The question isn't about what Boeing ARE doing but about WHY they are doing what they are doing. Why are they working on MOMA rather than developing the 757 or 767?
The 757 and 767 are OLD airframes. New airframes will likely be composed of MUCH more composites and less aluminum, with more modern engines and avionics. A rehash of an old airplane just wouldn't sell in a competitive market, so they may as well start from scratch (or from the 787 concept).