TruTrak Digiflight II Operating Manual - Manual (Page 8)

7
Continue depressing the knob
for 15 seconds to set the gyro
center.
Power Loss
If there is a momentary
loss of electrical power, the
autopilot will disengage. The
autopilot gyros may need to be
manually re-initialized using
the
GYRO SET
operation.
Manually fly the aircraft in a
straight line as steadily as
possible, while holding in the
knob for at least ten seconds
after the words
GYRO SET
appear in the display. After
approximately ten seconds have
elapsed, release the knob. The
autopilot may now be re-
engaged, and any residual gyro
offset will be slaved away
automatically.
Digiflight IIVS
Lateral Modes
Upon being engaged, the
autopilot will be in the basic
lateral mode, and it will
synchronize to both the
direction and vertical speed
being flown at the time. The
number following SEL
(Selected direction) is
underlined, meaning that
rotation of the encoder will
select heading. Rotation of the
knob when it is not depressed
will cause 5
° steps of SEL and
when it is depressed the steps
will be 1
°.
If a GPS flight plan has
been entered into the GPS,
pushing the MODE button will
engage the GPS
NAV
mode and
a flashing plus sign will show.
In the GPS
NAV
mode the
autopilot will follow a flight
plan programmed into the GPS.
However, the autopilot must
over-fly each waypoint prior to
turning and intercepting the
next course line.
If the
GPSS
option has
been added, pushing the MODE
button will engage the GPS
Steering. In the
GPSS
mode
the autopilot follows lateral
steering or bank commands
generated by a navigation
system (EFIS or GPS). Once in
the
GPSS
mode, pushing the
ALT button will enter the
GPSV
mode as well. This
feature will only be available
when coupled to certain EFIS