TruTrak Sorcerer RV10 AP100 - Manual (Page 11)

Sorcerer, RV 10, AP 100 Autopilot Installation Manual 9 TruTrak Flight Systems
May 2009 8300-010 Rev B
The next step in the check-out procedure is to verify that the serial input from the GPS receiver is being properly received and
interpreted. With the aircraft outside of any building, power up the GPS panel-mount receiver and the autopilot. While the
GPS is acquiring, the display will show NO FIX with a flashing “.” After the GPS receiver acquires its position, the autopilot
will begin to flash the “*” character once per message from the GPS unit showing that valid position data is available. The
display will now show GPS OK. If the display shows NO GPS, even after it is known that the GPS unit has a position fix, the
problem must be diagnosed. Possible reasons for such a problem are,
ƒ Pin 25 on the connector is not wired to a source of RS-232 serial data, check wiring.
ƒ The GPS receiver’s baud rate disagrees with that selected within the autopilot, match up Baud rates.
ƒ The GPS receiver’s serial output port has not been properly configured to provide the information, see GPS manual for
configuration setup.
Summary:
ENGAGE AUTOPILOT WITH FLIGHT CONTROL CENTERED,
ROTATE KNOB CLOCKWISE. FLIGHT CONTROL MUST MOVE
TOWARD RIGHT. ROTATE KNOB COUNTER CLOCKWISE,
FLIGHT CONTROL MUST MOVE BACK TOWARD LEFT.
TAP “UP” ROCKER SWITCH TO 1000’ UP. FLIGHT CONTROL
MUST MOVE BACK. TAP “DN” ROCKER SWITCH TO 1000’
DOWN. FLIGHT CONTROL MUST MOVE FORWARD.
Yaw Damper Ground Checkout
On the ground for Yaw setup reduce MIN Airspeed in the controller to “0”. The next step in the checkout procedure is to
verify operation of the yaw damper. Before this test, remove the yaw damper module from its mounting location (a vertical
bulkhead) so that it can be manually tilted. Verify the direction strap is correctly wired on pins 16 and 17 of J501, the 25-pin
yaw damper connector. If the unit is to be mounted on the rear side of a bulkhead, the strap between pins 16 and 17 of J501
must be absent; if the unit is to be mounted on the front side, the jumper must be present.
Having verified the strap, set the YD ACTIVITY in the controller to 15, manually center the rudder and then engage the yaw
damper by pressing the TRK key on the autopilot programmer. With the toggle switch on the controller away from “ON” for
centering, hold the yaw damper module in the same position it will occupy when mounted on the bulkhead in an approximately
level position that stops the servo rotation. Tilt the module to simulate the aircraft banking to the right. The yaw damper
should respond by commanding the rudder to move towards the right, and conversely a bank to the left should move the rudder
towards the left. If the servo moves in the wrong direction during this test, double-check the correct jumper setting on pins 16
and 17 and if found to be correct, interchange the wires on the yaw damper servo connector (pins 4 and 5 of J401) or at the
connector on the yaw damper module (pins 12 and 13 of J501). Re-check the direction after exchanging the wires.
Having verified the correct direction of response to the tilt sensor, secure the yaw damper module to the bulkhead. Re-engage
the yaw damper and adjust the leveling potentiometer (which protrudes from the face of the yaw damper module) to stop the
movement of the servo (rudder). The aircraft should be on a level surface (with its “ball” centered) for this adjustment. Once
the proper adjustment is done, switch the toggle switch toward “gyro on”, press the TRK key to disengage the yaw damper, re-
enter the lateral setup using the TRK button, repeatedly push and release the UP control of the VS rocker to 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. Holding down the ALT button to enter the setup mode, and repeatedly pressing the UP control on the VS rocker to
advance to the MIN AIRSPD field, set the minimum airspeed to the desired value for actual flight. This should be an indicated
airspeed (in knots) which is safely above the stall but below normal approach or climb out speeds. Make sure that the toggle
switch on the Yaw Damper controller is toggled toward “gyro on” for flight.
Tilt the module to simulate the aircraft banking to the right. The yaw damper
should respond by commanding the rudder to move towards the right, and
conversely a bank to the left should move the rudder towards the left.