I think the problem in analysing (or purporting to analyse) the power setting "data", such as:
Simple, they can't
or
As for the question about conducting a steep turn in a helicopter at 21" MAP......it is very likely and indeed possible due to the application of 'other' forces such as aft cyclic.
is moot when the continuity and clarity of the "data" is particularly suspect and the interactions of rotor (aero)dynamics and the engine governor behaviour is assuredly complex.
Stay Alive,