Autopilot Servo Installation, Configuration, and Calibration
10-26 SkyView System Installation Guide - Revision K
Verify preferred airspeed minimum and maximum values and default climb and descent
vertical speeds
Perform the following steps:
1. Enter the Pitch Axis Menu (SETUP MENU > AUTOPILOT SETUP MENU > PITCH AXIS).
2. Verify the DEFAULT CLIMB VERTICAL SPEED, DEFAULT DESCENT VERTICAL SPEED,
MAXIMUM AIRSPEED, and MINIMUM AIRSPEED are set to values that are within your
comfort limits.
3. These values are configurable before, during, and after flight. Use the instructions found
in previous sections (i.e., the Default Climb Vertical Speed, Default Descent Vertical
Speed, Maximum Airspeed, and Minimum Airspeed sections) to adjust these values.
Ensure the aircraft is in trim
This test procedure tunes the autopilot’s pitch axis control. It is critical to isolate this axis and
thus, you should start the procedure when the aircraft is in neutral trim and maintain a
constant heading during the following steps.
Engage the autopilot in altitude mode
1. Enter the AP Menu (MAIN MENU > AP MENU).
2. Press button 4 to engage the autopilot in altitude mode. The button label should change
from to and the Top Bar autopilot status indicator should change to
.
3. Ensure that the autopilot roll axis is disengaged. If needed, press button 2 until its label
looks like .
Allow a few minutes of stable flight under autopilot control
Note that the autopilot is flying in altitude hold mode, so you will need to control the aircraft in
roll. Ensure that you are not affecting the autopilot’s control of the pitch axis, so you can
determine the autopilot’s altitude hold and change performance.
Adjust pitch servo torque and/or sensitivity values as needed
Observe the autopilot status on the Top Bar while the autopilot flies. If the pitch axis indicator
frequently looks like , that is an indication that the pitch servo is slipping and the
torque needs to be increased. Occasional slips due to turbulence are acceptable.
If necessary, adjust the torque percentage on the Pitch Axis Torque Adjust Page (SETUP MENU >
AUTOPILOT SETUP > PITCH AXIS > TORQUE).
If you have adjusted the roll servo torque to 100% and are still seeing frequent
slips, you may need to try a higher strength servo (e.g., if you have an SV32
installed, try swapping for an SV42).
After verifying that the torque percentage is set appropriately, watch closely for autopilot
wandering around the target altitude. The autopilot should keep the triangle of the altitude bug
(shown in Cyan in Figure 64) closely aligned with the triangle of the numerical altitude indicator.
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