Was just admiring the lastest 77W for BA, when I began to question:
I wonder what are the performance differences between the first few 77Ws that came out and the latest 77Ws?
I have tried to do a search for this, but no luck; I know in almost all aircraft programmes, the first 'wave' of units that come out are usually a heavier, i.e. a lower MTOW. A perfect example is the A330, which is enjoying substantial sales thanks to upgrades (and delays of the 787?) ... and also the A388 - which is pushing for this close to 600T MTOW magic number.
Boeing striked the perfect balance in upgrading the 773 to 77W in my opinion, but are there significant modifications in, for example, the wing structure, the GE engines (PIPs ?) ?