Earlier quoted context omitted.
I'm one of the originators and principle repeaters of the theory, and the various facets that go into it are admittedly built up via synthesis of many different slices of life. The principle source that moved me in the direction that the MAX may not be certifiable without MCAS was from this interview from the Royal Aeronautics Society with D. P. Davies, a well known test pilot for the U.K. ARB, and the past woes that…
> the entire horizontal stabilizer needs to be moved to ensure the nose is brought back down in short order Doesn't MCAS take a long time to significantly move the stabilizer? Like tens of seconds? It's hard to square needing to decrease AoA so dramatically with the actual mechanics of MCAS.
Keep in mind, the entire horizontal tail plane moving has a heck of a lot more influence on attitude than the elevators.
If it were a stringed instrument, trim would be the tuning tabs at the top of the neck, the elevators would be the fine adjustment screws on the body of the instrument.