FLIGHT DIRECTOR Mode (FD)
The Flight Director mode
is
activated by
depressing the “FD” button on the Mode
I
Controller.
The FCI Command V-bar will appear
and provide the pilot with steering commands
to
maintain wings level and the pitch attitude
that existed at the time of Flight Director
engagement.
If pitch or roll attitude are changed, re-
cycling the FD button will synchronize the
Command V-bar
to
the new situation.
If
a change only in the commanded pitch
attitude is desired, the Control Wheel Steering
(CWS) button installed on the pilot’s control
wheel allows the pilot
to
synchronize the Com-
mand V-bar (in the FD mode with Autopilot
disengaged) without removing his hand from
the control wheel.
The Flight Director can also be activated
by direct selection of any specific mode,
which will activate the Command V-bar. Such
selection will annunciate both FD and the
appropriate mode.
The Vertical Trim switch on the Mode
Controller may also be used
to
adjust the
selected pitch attitude up or down at approx.
1
degreelsecond.
Special note: The FD mode must be
activated before the Autopilot can be
engaged.
AUTOPILOT Engagement
The AUTOPILOT is engaged by moving
the solenoid-held AP toggle switch on the
Mode Controller
to
the ON position. Note that
the AP and the YAW DAMP (YD) switches are
wired
so
that the YAW DAMP mode is
automatically engaged with the AP switch.
The Autopilot, together with the Yaw
Damper, provides three-axis stabilization,
automatic turn coordination and automatic
elevator trim as well as automatic response
to
all selected Flight Director commands.
I
CAUTION:
When the autopilot is engaged,
manual application of aforce
to
the pitch axis
of the control wheel for a period of
3
seconds
or
more will result in the autotrim system
operating in the direction to create a force
opposing the pilot. This opposing mistrim
force will continue
to
increase as long as the
pilot applies a force
to
the control wheel and
will ultimately overpower the autopilot.
If
the
I
If
I
autopilot is disenoaoed under these
conditions, the p
lot
maybe required to exert
control forces in excess of
50
pounds to
maintain the desired aircraft attitude The
Dilot wi,I have
to
maintain
tnis control force
while he manually retrims the aircraft
CAUTION:
Prior to Autopilot engagement,
the pilot should make sure the V-bar com-
mands are satisfied This
will
prevent any
rapid changes in the aircraft’s flight path
when the Autopilot
IS
engaged
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