Originally Posted by
stupidhead
Is the 77W's inability to get more range a fuel thing (gas tanks not big enough so runs out of gas) or a thrust thing (can't carry the gas into FL390 even if the whole thing were a tanker)? If the former, put a tank in part of the back hold and call it the 300LR. If the latter, I guess they'll need a bigger engine.
Weight is an issue for every aircraft.
The 777NG would be lighter with more efficient engines.
It must be tough to improve on the current 77W offering. Doing so now would be competing against yourself