PPRuNe Forums - View Single Post - Why to autopilots have no rudder authority?
Old 8th Mar 2011, 01:22
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Dan Winterland
 
Join Date: Jun 2001
Location: Fragrant Harbour
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You're talking individual types here and of the four large aircraft types I've flown, only one of those didn't have an autopilot rudder channel (747 - both classic and -400).

The 747 does have a yaw damper which also adds a rudder input to prevent adverse yaw in some circumstances. The 747 has two sets of ailerons, inboard and outboard. Only the inboard ones are used at higher speeds as a result of wing twisting and possible aileron reversal. On the classic, the outboards become active when the flaps are selected, on the 744 at 238 knots.
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