Dynon Avionics SkyView, Tuning Manual

Page: 2 / 11

Autopilot In ‐ Flight Tuning Procedures
1 ‐ 2 SkyView Autopilot In ‐ Flight Tuning Guide ‐ Revision A
Roll Axis In ‐ Flight Tuning Procedure
This procedure tunes the roll autopilot servo and thus, the flight characteristics of the aircraft in
heading holds and turns. This procedure should be performed with the autopilot roll axis in
track (TRK+ALT) mode, where the purpose of the autopilot is to keep the aircraft’s GPS ground
track aligned with the track bug (as well as hold altitude). Before executing this procedure:
1. The autopilot controls should be changed to SIMPLE mode (SETUP MENU > AUTOPILOT
SETUP > AUTOPILOT CONTROLS)
In ‐ Flight Procedure
The following list is an overview of the procedure. Each step is described in more detail after
the list, in flow ‐ chart and textual formats.
1. Establish trimmed level flight on a fixed heading
2. Engage Autopilot (AP) in TRK+ALT mode
3. Allow a few minutes of stable flight under AP control
4. Change the TRK target 90 degrees from the current target
5. Check for ROLL SLIP indications
a. If observed, disconnect AP, increase ROLL TORQUE by 10% and start over
b. If ROLL TORQUE is already set to 100%, contact Dynon
6. Check if aircraft is slow to respond
a. If observed, disconnect AP, increase ROLL SENSITIVITY by 2 and start over
b. If ROLL SENSITIVITY is already maxed out, contact Dynon
7. Check if aircraft is “twitchy” in ROLL axis
a. If observed, decrease ROLL SENSITIVITY by 1
b. Change the TRK target 90 degrees from the current target
c. Check if aircraft overshoots TRK target
i. If observed, disconnect AP, increase ROLL GAIN by 0.2 and start over
8. Check if aircraft overshoots TRK target
a. If observed and you have been changing ROLL GAIN, disconnect AP, increase
ROLL GAIN by 0.2 and start over
b. If observed and you have not been changing ROLL GAIN
i. If ROLL SENSITIVITY is maxed out, disconnect AP, increase ROLL GAIN by
0.2 and start over
ii. Otherwise, disconnect AP, increase ROLL SENSITIVITY by 2 and start over
9. Verify acceptable AP Roll performance
a. If unacceptable, refer to Roll Troubleshooting Section
b. If acceptable, procedure is complete