Yaw Damper 747-400
A question raised on another forum ...
If a 747-400 single Yaw Damper (Upper or Lower) system fails, will the serviceable YD system produce twice the rudder deflection it normally would for a given set of circumstances (assuming the effectiveness of upper and lower surfaces was equal)? i.e. up to the normal authority limit
Or would the serviceable Yaw Damper system simply output a given (tabulated) deflection for the current sensor (IRU/ADC) inputs? (but perhaps prolong the rudder deflection until it had achieved what it was trying to do).
Hope this makes sense.
Thanks.
Rgds.
NSEU