CabinMaster;
Thanks for your patience and the very useful link to the Airbus Performance 'Tutorial'.
I must retreat. It is
not correct to say that the speed for max rate of climb is simply a certain cL independent of weight. On the other hand, I'm not quite sure that you 'got everything right'. The Airbus document doesn't quite say that:
2.2.3. Climb at Maximum Rate
Climbing at the maximum rate of climb speed enables a given altitude to be
reached in the shortest time. (...) (refer to “Climb at minimum cost”).
2.2.4. Climb at Minimum Cost
(...) for a given cost index, an optimum climb speed (IASECON) and an optimum climb mach number (MachECON) are calculated by the FMGS as a function of the aircraft’s weight. (...)
regards,
HN39