Originally Posted by OPEN DES
Correct me if I am wrong but the speeds calculated by a Boeing FMC are just weight/config dependant?
It will be rather difficult to implement this feature in an Airbus FMGS because the Vspeeds in a FBW Airbus are always optimized in order to achieve maximum flex (=assumed temp). In other words: Airbus Vspeeds are nearly always based on improved climb technique and among many factors are largely dependant on the runway.
Airbus could (if they wished to) allow the FMGS to display balanced field speeds (to be overwritten if so desired).
It would then be same as in Boeing, where you can, of course, also use improved climb technique to allow for higher MTOM or higher AST (or higher fixed derate, or both). Values will differ from balanced field in such a case.