TruTrak Digiflight II Operating Manual - Manual (Page 7)

6
Altitude Hold Mode
When the autopilot is
engaged it will be in the basic
lateral track mode, and will
synchronize to the direction
being flown at the time. The
pitch servo will not be engaged
at this time. To engage the
altitude hold the aircraft must
be at the desired altitude and be
trimmed for level flight. After
trimming the aircraft, to enter
the altitude hold mode, simply
press and release the ALT
button. The display will show:
If an altitude change is
desired, it is necessary to turn
off the altitude hold. To do
this, press and release the ALT
button. The display will show:
Minimum and
Maximum Airspeed
The Digiflight II series
autopilots have a minimum and
maximum airspeed feature.
These are added only for safety.
If the autopilot is in altitude
hold and the pilot reduces
power to a point at which the
airspeed falls below the
minimum airspeed set in the
autopilot, the autopilot will
allow the aircraft to begin a
descent and flash
MIN AS
on
the display.
Likewise if the autopilot is in
altitude hold and the pilot adds
power to a point at which the
airspeed reaches the maximum
airspeed, the autopilot will
allow the aircraft to climb and
will flash
MAX AS
on the
display.
Gyro Set
When the initializing has
been done correctly, the gyros
should already be centered at
the time of take off. If
confirmation of this is desired,
with the aircraft stationary on
the runway and the autopilot
disengaged, pressing and
holding the encoder knob will
put the gyros in the fast
centering mode. The knob
should be depressed for
approximately 3 seconds during
which time the words
GYRO
SET
will be displayed.