Quote:
Yes we do know. This aircraft was NOT susceptible to a deep stall.
We (he) know(s), I don't.
Here's a document prepared jointly by Boeing and AB in the late
nineties (!) on general upset recovery. (It's a sticky on this site.) The argument above is addressed, though not definitively.
Aerodynamic Principles of Large-Airplane Upsets
Beg all of your pardons if this has already been linked in this thread.
Certainly begs the question: when was upset recovery training started? And then.....when was it stopped/reduced?