SUB TRIM
S-20
Use Sub Trims to fine-tune the alignment of servo arms.
1. Highlight and select Sub Trim in the FUNC.LIST to
obtain the Sub Trim Display.
2. Highlight and select the channels where the sub
trims must be adjusted. Once a channel is selected,
rotate the Selector until the servo arm is in the
desired position.
Note: Typical flap geometry requires that the sub
trim be significantly offset to provide adequate down
flap throw. This issue exists because flaps typically
have a large travel down (80 to 90 degrees) but very
little travel up (less than 15 degrees). To achieve
proper flap travel, it is necessary that the right flap
sub trim be set at 225 down and the left flap sub
trim be set at 225 up as a starting point. Then, when
attaching the flap servo arms, be sure the spoiler
stick is in the up position and camber lever is in the
middle position. Install the flap servo horns such
that they are angled approximately 30˚ toward the
trailing edge, then adjust the flap linkage such that
the flaps are level.
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