Originally Posted by
BuzzBox
Those B747s would be guzzling at least twice as much fuel as the A350 or B787. An A350 or B787 "in a hurry" can go fast too: MMO = M0.89 (A350), M0.90 (B787) vs M0.90 (B747).
All true. 747 will have a higher GS at the lower FLs it can get the skates on at though.