Bearfoil ...
What is the Rudder Limit in Alt Law II?
A330 - Yaw. If both SECs are inop, max rudder deflection remains at its last known value and max is only available when slats are extended. 31.6° max is available up to 150kt then reduces to 4° gradually. In the case of total hydraulic failure, the rudder travel is damped so the rudder returns to aerodynamic neutral. In case of total electrical power failure or loss of flight computers, the back up yaw damper unit (BYDU) becomes active for yaw damping functions. After total electrical failure or loss of rudder control due PRIM/SEC fail, the Backup Control Module controls YLO or BLU if YLO inop. THE BCM has its own Backup Power Supply driven by either BLU or YLO hyd. Rudder trim is through 2 electric motors positioning artificial feel units normally through SEC 1 and motor 1 with SEC 2 and motor 2 in synchro as back-up. When activated in alternate yaw, there is no turn co-ordination.
The above extract (A330 items only) from
http://www.andytracy.net/files/27FLTCTL.doc was the reason I mentioned the RTLU and its measured limit of 7.9° after recovery.
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