Dynon Avionics Sonex/Waiex Roll Kit - Manual (Page 5)

DYNON AVIONICS
Servo Mounting Instructions – Sonex/Waiex Roll Kit 4
101866-000 Rev A
All AN bolts supplied by Dynon have drilled heads for use with safety wire. With the servo in
place, torque all fasteners to installation specifications and add safety wire where needed.
To prevent the possibility of the servo arm going over-center, the servo arm must not travel more
than a total of +/-60º from neutral throughout the control system's range of travel. Most
installations use the outer most hole on the servo arm, due to variations in mounting plate and
servo bracket installation locations, each install varies. The linkage should be installed such that
adequate force is applied to the pilot side control stick horn with the pushrod perpendicular to
both the servo and the link rod. Changing the location of the pushrod mounting on the servo arm
will affect servo torque output, servo arm travel, control surface resolution, and the amount of
force required to shear the safety screw, the installer should have an understanding of these
implications. See Fig 2 which illustrates the linear travel and available force for each mount
point on extra-long-arm servos.
The distance between the servo arm and the control system attachment point must allow for the
angle between the servo arm and the push rod to be at approximately 90º when the controls are at
neutral. Use the adjustability in the rod ends to achieve this, and then tighten the jam nuts to lock
the rod ends in place. Installers should always keep in mind the range of motion of the servo.
Total servo arm travel is limited, but verify the arm/linkage do not interfere with anything during
the full motion of the control stick. The built in control stops of the aircraft will limit the servo
arm travel when installed correctly. We recommend the use of the optional Range of Motion
Limiting Bracket, supplied with the servo to eliminate the chance of the servo arm going over-
center. This bracket should not be used as a normal stop; the aircraft's built-in stops should
always be the primary range limit.
The SV42EL Servo arm must not come into contact with the aircraft seat pan at
any time during its rotation or when seat is occupied.
For the latest documentation on all Dynon products go to dynonavionics.com . Please read
through that documentation to understand the wiring and configuration process for your
Autopilot system. We also maintain a collaborative set of this documentation, which is often
updated with new information by both Dynon and fellow builders. Visit
wiki.dynonavionics.com
to view and contribute to the latest version of these documents.
You can also visit
forum.dynonavionics.com to discuss and share installation notes, pictures, and
suggestions with other builders.
Neglecting to properly install and/or use Dynon autopilot hardware may result in
failures which could cause loss of aircraft control resulting in aircraft damage,
personal injury or death.