Bear
Your Pitch 'n' Power mode is what the AP does all the time for its bread and butter. There are of course a few environmental inputs that it needs to effect this operation in a closed loop manner, e.g. barometric alt, OAT, and CAS amongst others.
How about looking again at a proposed method of replacing the CAS short term when UAS becomes an issue as described in
AF447 Thread No.4 page 31. The advantage of that proposed method is the AP software operates as per normal and the missing CAS is calculated using all the other parameters that are already known.
This is not meant to be a panacea for all the ills that the PF may be confronted with, e.g. the nose-down right-hand roll. Though in this case if the pseudo CAS was injected seamlessly the AP would have carried on correcting for that perceived external force.
Meanwhile, I'm still contemplating the dynamics of "bubbles" being blown by a grandchild in the bath.
