MFS, you dont agree with me......
Well lets see what Mr Airbus has to say....
1: For a given weight it is possible to select a temperature lower than the maximum determined one and keep the speeds defined at the maximum temperature.........
or
2: Takeoff must be performed with TOGA (in this example MTOW = 259000 kgs 137/157/166) takeoff speeds for the actual TOW 252000 kgs are increased to MTOW speeds.....
or
3: As the performance limited MTOW of 279000 is greater than the structural MTOW of 275000. 275000 has to be retained as the MTOW. Enter the chart with the MTOW to find the v-speeds.
So as I said, both methods are correct!
Mr Photons, what aircraft type are you talking about? It sounds incredibly strange....
Mutt