infrequent flyer: this is a wirehead question in two parts, but I'll ask anyway.
1. What parameters inform (other than sidestick command, or in mechanical back up mode the trim wheels) how the THS moves up or down?
Are the inputs into Pri or Sec that lead to THS commands (which include autotrim commands)
-airspeed?
-AoA?
-a blend/sum of both?
(Are other intertial systems inputs summed in to create the final signal? the (dated) block diagram doesn't get into the wire and signal inputs and loops).
2. As I understand the (dated) block diagram, mechanical mode (trim wheels) does not command the elevators, it commands only the THS.
(If I have misunderstood this, please advise).
Interesting comment on the old training aid I am referring to:
Regardless of pilot inputs, the computers will prevent :
- excessive maneuvres
- exceedance of the safe flight envelope