TruTrak ADI Pilot II - Manual (Page 12)

TruTrak Flight Systems ADI Pilot I & II Autopilot Installation Manual
December 2009 10 8300-012 Rev B
necessary. Starting with the maximum torque setting (12), gradually decrease the value using the knob, until it is observed that
the autopilot no longer has the necessary torque to respond to disturbances; then increase the setting somewhat from that level
using the lower right knob until no more slippage of the servo is observed.
Once the desired torque level is established, press and release the lower right knob to store the value. Press and release the
knob one more time to pass through the minimum airspeed setup, which should have already been completed in the ADI Pilot
II Initial Checkout portion of this manual.
The display will now show a flashing “8”, this is the static lag setting. This setting will not be adjusted at this time. If it is
observed that the aircraft hunts and adjustment of the vertical activity will not solve the problem, static lag may need to be
adjusted. If this is the case, the factory will advise on how to adjust this setting. Press and release the lower right knob to
advance to the final setup screen.
The final setup screen, with a flashing “9” is used to set the vertical micro activity and the vertical half step drive. The half
step drive mode is selected by rotating the lower right knob CCW until the display shows “- -“. This should only be used if one
notices in extremely smooth air, a slight “bobble” of the nose every few seconds. The vertical micro activity portion of this
setup mode will only be used if half step drive is not required. The vertical micro activity setting should not be adjusted unless
advised by the factory. This setting is used to remove lost motion from the control system. In most cases this setting will be
left at zero. Press and release the lower right knob to exit the setup mode.
The setup procedure can be repeated whenever it is desired to modify the dynamic flight characteristics of the autopilot.
Gyro Back-Up Mode
The lateral modes previously described for both ADI Pilot I and ADI Pilot II are based on GPS track being present. When GPS
is lost, the autopilot uses its internal gyros for bank control, and the display will no longer show the digital DG. This mode is
only a backup and would seldom be needed; however, it does provide a means of selecting a desired bank angle, and a means
of adjustment if the aircraft turns when zero bank is selected. When in the gyro backup mode the number displayed is the
selected bank angle. Rotating the encoder knob will move the selected bank angle one degree at a time up to 30 degrees.
If the aircraft continues to turn when a bank angle of zero degrees has been selected, push in on the lower right knob and the
display will switch over to the trim adjustment portion of the gyro back-up mode. This adjustment is selectable in increments
of 0.1 degrees per minute up to 9.9 degrees per minute in either direction. The displayed numbers will range from 1 to 99
where 1 is equal to 0.1 degrees per minute and 99 is equal to 9.9 degrees per minute. Every time the trim is adjusted it will add
the displayed number to the current trim adjustment.