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Old 2nd Mar 2015, 16:46
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FCeng84
 
Join Date: Feb 2009
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Boeing Direct Mode includes Augmentation

Allow me to correct the following statement from Winnerhofer:

"It’s quite clear that pitch control in Secondary & Direct modes is proportional elevator deflection. I.e. the elevator position is based directly on the column position."

Boeing 777 Direct Mode includes pitch damping as part of the elevator command. Boeing 787 Direct Mode includes rate feedback for damping in all three axes (pitch, roll, and yaw).

Boeing Secondary Mode has the same control law functionality as Direct Mode.
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