With LNAV engaged, what is the limit of roll command drive?
6° per second
What is coupled to VNAV?
Autothrottle, to provide either thrust or speed control
What can disengage LNAV?
Selecting HDG HOLD or HDG SEL modes
What needs to be selected before the VS mode can be engaged?
Vertical speed
What is the rudder channel generally considered to be in a three axis autopilot system?
Stability channel
Why might there be an interaction between the roll channel and the rudder channel in autopilot and what is this known as?
To assist in coordinated turns and for faster stability response
Rudder to aileron crossfeed
When might well damped Dutch roll modes experience degradation?
Airspeed decreases and altitude increases
What might increase the roll restoring force, and therefore increase the Dutch roll tendencies?
- Wings placed well above the centre of mass
- Sweepback
- Dihedral wings
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Chapter 1 - Autopilot principles5
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Chapter 2 - Command Signal Processing8
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Chapter 3 - Modes of Operation1
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Chapter 4 - Yaw Damper System6
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Chapter 5 - Automatic Trim Control9
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Chapter 6 - CWS2
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Chapter 7 - Autopilot NAV Aids Interface9
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Chapter 8 - Autothrottle System20
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Chapter 9 - Automatic Landing System15
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Chapter 10 - Helicopter AFCS13
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Chapter 11 - Helicopter Stability Augmentation4
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Chapter 12 - Control Surface Actuators5
