An interesting observation from the nasa films.

They focus on the complete stall and flight chrateristics thereafter but I am wondering about what happens prior to stall when you have reduced lift.

If the tail is in partial stall due to leading edge ice and the AP is active, I wonder how far up the elevator would be? If boots blow and you exit the near stall will you feel it when when the AP corrects? How fast and how much?

What happens if all this occurs with gear and flaps down, perhaps with ice impaired wings?

With the de-ice on auto cycle (particuarly slow) and quickly building ice there is a finite chance that this could happen all at once.

Perhaps it is a good Idea to manually activate the deice prior to any major configuration change when there is any chance of ice, even if you are on autocycle?

Any thoughts?