Leading on from my last post, the interesting part (for me) is that if disc attitude is inclined this time, but the ground is level, we have identical variation in ground effect.
It suggests that tilting the disc forward to transition away from a still air hover results in identical effects on the disc. I beleive this is the root cause of Inflow Roll (to the right for anti -clock MR's)
That said, as soon as the Heli moves, all of the standard forces come into play and Inflow
Roll becomes greater.
I have left out flapback to simplify.