Quote:
Originally Posted by Machinbird
The problem is that the force and travel required to activate the rudder to its limits were minimal, and thus it was easy to excite a yaw oscillation by relatively small repetitive rudder inputs.
Originally Posted by Clandestino
Makes me wonder if it was so easy, why did the unlucky F/O bother with exerting 140 lbs push?
If you will remember, it only took about 30 lbs of force to reach the limit at that speed-that isn't much at all.
He was attempting to get the rudder moved as quickly as possible and was trying to help it along
.
Or perhaps he was just spooked by the extreme yaw.
Assuming they only have rudder position indications on the FDR and not force indications, the 140 lb estimate would come from rudder rate acceleration tests.