OK, moving away from the certification issues, is there a way to determine experimentally the AoA to obtain Vymax?
One of the types I fly is equipped with an AoA vane (C525) and if I follow the climb profiles recommended by the manufacturer, the AoA is not constant. However, it is actually quite easy to climb at a constant AoA by using the trim wheel. It would be interesting if I could determine the AoA for finesse max, and then try a climb at that AoA.
Glum - ATC do use resulting groundspeed as their own control parameter, but they have to work around whatever groundspeed aircraft are doing. Anyway, it is not the issue here.