Airbus Turn Coordination

[K.Whyjelly]

From the A330 FCTM...............................

LATERAL CHARACTERISTICS
NORMAL CONDITIONS
When the PF performs a lateral input on the sidestick, a roll rate is ordered and naturally
obtained.
Therefore, at a bank angle of less than 33 °, with no input on the sidestick, a zero roll rate is
ordered, and the current bank angle is maintained. Consequently, the aircraft is laterally stable,
and no aileron trim is required.
However, lateral law is also a mixture of roll and yaw demand with: ‐ Automatic turn coordination ‐ Automatic yaw damping ‐ Initial yaw damper response to a major aircraft assymetry.
In addition, if the bank angle is less than 33 °, pitch compensation is provided.
If the bank angle is greater than 33 °, spiral stability is reintroduced and pitch compensation is no
longer available. This is because, in normal situations, there is no operational reason to fly with
such high bank angles for a long period of time.

Also look in FCOM 1:27:20 pg2 A319,320,321

Pitch trim is automatic both in manual mode and when the autopilot is engaged. In normal
turns (up to 33 of bank) the pilot does not have to make any pitch corrections once the turn
is established.