Mathy's post was, for me, both very interesting and worryingly complex. Right on the limit of what I - a hi-tech kit engineer, but entirely without aeronautical training or teaching - could understand.
I can see from his and the other answers that the 767 has the
power reserve to punch it along faster, but it's intrinsic aerodynamics don't want to go that fast. Now, I have always understood that the B747, in most of its forms, was and, so far as I know, still is the fastest subsonic airliner in the business?
The paradox for me is; the 767 was designed
after the 747; the 747 is much bigger and has more or less all the same features, ostensibly, as a 767 and yet, it seems, its aerodynamics are happy to troll along at M0.9X and harrumpty-bump thousand feet while running on fumes. Why is this please?
Roger
PS: Mathy - lovely answer mate, but try not to live up to your name so much - I can't keep up!
