I’m posting this in the “airlines” section in the hope you folks who fly the big stuff might have ideas…
I’m writing a fictional piece in which a T-tailed airliner (CRJ-200) is testing new flight software and gets caught in a DEEP STALL. As most of you probably know, this is where disturbed air coming off the wings at a high AoA blankets the tail (on a T-tail a/c), rendering the elevator useless. It has caused some notable crashes and is considered by most pilots to be "inescapable."
I have a 1965 NASA Langley simulator study that talks about “low pitch damping and negative pitch damping” being “favorable to recovery,” and an aeronautical engineer mentioned the possibility of rolling inverted to escape it, though that takes you into a yaw area where you could end up in a flat spin… then you’re even worse off.
Are there any “sensible” ideas out there for breaking a deep stall in an airliner (other than of course detecting it while you still have enough elevator to pitch down)?