TruTrak EFIS AP (8300-057C) - Manual (Page 19)

TruTrak Flight Systems 17 EFIS Autopilot Installation Manual
flex in any way that could cause control system lockup at the extremes of servo travel. Insure that any
is eliminated or minimized, in order to maximize the performance of the
slow “hunting” behavior in flight.
he next step in the check-out procedure is to verify that the serial input from the GPS receiver is being
wn that the GPS unit has a position fix, the problem must be
ENGAGE AUTOPILOT WITH FLIGHT CONTROL CENTERED,
ACTIVITY in the EFIS to 15. Manually center the rudder and then engage the yaw damper
ll but not below normal approach
to
“lost motion” in the linkages
autopilot. Lost motion (dead zone) will result in wandering or
T
properly received and interpreted. With the aircraft outside of any building, power up the GPS receiver
and the autopilot. While the GPS is acquiring, the display will show NO GPS FIX. After the GPS
receiver acquires its position, the autopilot will display the valid position data is available. If the display
shows NO GPS, even after it is kno
diagnosed and corrected.
Summary:
ROTATE LEFT KNOB CLOCKWISE A FULL ROTATION. THE
FLIGHT CONTROL MUST MOVE TOWARD RIGHT. ROTATE
LEFT KNOB COUNTER CLOCKWISE, FLIGHT CONTROL MUST
MOVE BACK TOWARD LEFT.
ROTATE RIGHT KNOB TO 1000’ UP. FLIGHT CONTROL MUST
MOVE BACK. ROTATE RIGHT KNOB TO 1000’ DOWN. FLIGHT
CONTROL MUST MOVE FORWARD.
Yaw Damper Ground Checkout
For an EFIS with a Yaw Damper, the next step in the checkout procedure is to verify operation of the yaw
damper.
Set the YD
by clicking the AP button on the EFIS. Note: Any time the autopilot is off in normal flight the yaw
damper may be toggled on and off using the YD key, so long as the aircraft is not flying slower than the
preset minimum airspeed.
The aircraft should be on a level surface (with its “ball” centered) for this adjustment. With the toggle
switch on the YD controller “OFF” for centering (leveling). Adjust the leveling potentiometer (which
protrudes from the face of the yaw damper module) to stop the movement of the servo (rudder). Once the
proper adjustment is done, switch the toggle switch toward “gyro on”. Push the tail away from you and
confirm that the rudder moves in the direction that you pushed the tail (empennage). Press the AP button
to disengage the yaw damper, re-enter the YD setup with the above procedure, advance to the and set YD
ACTIVITY value to zero. This insures that the yaw damper adjustments do not complicate the first test
flight of the autopilot, confirm that the minimum airspeed is set to the desired value for actual flight. This
should be an indicated airspeed (in knots) which is safely above the sta
or climb out speeds. Make sure that the toggle switch on the Yaw Damper controller is toggled toward
“gyro on” for flight.
With autopilot and yaw is engaged push on tail and rudder must move in
direction you have pushed.
April 2009 8300-057 Rev D