190-01115-01 G3X/G3X Touch Installation Manual - GSA 28 Installation
Rev. AC Page 17-6
Figure 17-2 Crank Arm Assembly
17.5.2.2 Stop Bracket Kit
Every GSA 28 is supplied with a 011-02951-00 stop bracket kit. The intention of this stop bracket is to
create redundant stops for the servo control arm that prevents the servo’s arm from going over-center
relative to the push rod connected to the servo’s arm. It is highly recommended this part gets installed with
every push-pull application. The stops created by installing this bracket are redundant in the sense that the
aircraft’s built-in stops should always be used as the primary means of limiting travel of the servo’s control
arm. This stop bracket limits the motion of the standard control arm to 100° total travel. This bracket
should be positioned such that the stop bracket flanges are as close as practical to being equal distance
from the servo’s control arm while at the center of travel. Also, to prevent an over-center condition, the
servo’s push rod should be as close as practical to perpendicular with the servo’s control arm while
positioned at the center of travel. The position of this bracket can be adjusted in increments of 15°. If
necessary, further adjustments can be made by changing the length of the push rod connected to the servo.
See Figure 17-8.2
, and Figure 17-8.3 for more details.
After installation of the servo is complete, verify that the stop bracket does NOT impede the full movement
of the associated control.
An over-center position of the servo control arm relative to the attached push rod can cause
the flight controls to jam. This could result in serious injury or death. Please be sure this is
well understood prior to flying with the GSA 28 servo.
CRANK ARM
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