Hi,
Machinbird:
Tarom Airbus A310-325 24 SEP 1994
Interflug Airbus A310-304 11 FEB 1991
Feedback systems in action. And for H
o you need 3H
o
Question: What about air density change effect during the descent? Seems to me makes easier the recovery. Dampens, provides more lift, ground effect

(it comes to my mind Ekranoplan. You mentioned Interflug