The THS doesn't move on its own, it is slaved to the elevator. The elevator moves in response to the PF's sidestick, whose 'demand' is interpreted by the flight control law. If there is no demand from the sidestick, the flight control law maintains essentially 1g. In short, the PF commanded the flight path into stall. OTTO disconnected at 02:10:05.
In the absence of PF input, NU, the a/c still trims for 1g. This means UP elevator.
With or without PF input, the a/c Stalls. Autopilot is not the issue? Neutral stick the a/c Stalls independently.....
You say, the elevator moves in response to the pilots input. It doesn't, it moves as a result of input by the computer. The computer commands NU, to provide 1G. The pilot provides a collateral input, NU. There is essentially a consonant, or "dual" input.
Because the THS is moving to follow elevators, who wants to parse who is who; they both are commanding the same thing, irrespective of the other's command.
All along, in this flight Law, this is what is happening, referenced to G.
No?
I think it is possible that the pilot was mimicking the flight path set by the computer, when he sensed less than 1G, he input NU. And he would be sensing less than 1G, whenever the a/c started to ND, both the pilot and computer have been adding up elevator. Now you could say he instigated the flight path that he ended up chasing up into the Stall, but he was terrified of descent, and "plus vitesse". Dropping airspeed was his goal, and climb was his result. Not cute, but he was in a corner......and his accomplice was the computer, for a different, and preprogrammed reason....
Last edited by Lyman; 9th Aug 2012 at 15:28.