SUB TRIM
A-20
Sub Trims are intended for relatively minor adjustments to
servo linkages and not for major trim adjustments to the
aircraft. Using excessive Sub Trim percentages can cause
a loss of available servo travel where the servo reaches its
travel limit and stops moving before the control sticks are
fully deflected. For more information on Sub Trims and
linkage setups, please refer to the Sub Trim Usage and
Mechanical Advantage article contained in the Glossary.
Use Sub Trims to fine-tune the alignment of servo arms.
Install servo arms on the servos so that the arms are at
90˚ or perpendicular to the servo case/linkage. Rotate,
swap and reinstall the arms or try different arms if
necessary to get them as close to 90˚ as possible. It is not
unusual for the arms to be off just a little bit. Now use the
Sub Trim function to fine-tune the servo arms that are not
quite at 90˚ to the linkage/servo case.
1. Highlight and select Sub Trim in the FUNC.LIST to
obtain the Sub Trim Display.
2. Highlight and select the channels where the servo arms
are not quite at 90˚ to the servo cases. Once a channel
is selected, rotate the Selector until the servo arm is
at 90˚ to the servo case.
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