Dynon Avionics RV-6/7/9 Pitch User Manual
Page 4
DYNON AVIONICS
Servo Mounting Instructions – RV-6/7/9 Pitch Kit
3
101046-005 Rev F
changes will affect geometry. Dynon suggests installing the linkage at the outer-most hole of the
servo arm. Changing this location will affect servo torque output, servo arm travel, control surface
resolution, and the amount of force required to shear the safety screw, and should only be changed
if the installer has an understanding of these implications. See the diagram on the following page
which illustrates the linear travel and available force for each mount point on standard-arm servos.
Thread both large rod ends with jam nuts into the supplied 4.0" tube. Mounting of the linkage to the
servo arm will include the AN3H-12A bolt, AN970-3 large diameter flat washer (for capturing the
rod end bearing), 2 AN960-10 flat washers, the 0.250” aluminum spacer, and the AN365-1032A
lock nut. The other end of the linkage will require the same type of stack-up, using the shorter
AN3H-11A bolt (no spacer at this end) and capturing the washer sandwiched between the halves of
the bell crank. Note the orientation of this bolt is flipped for clearance when compared to the bolt
installed in the servo arm
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.
Your servo(s) and AP74/76 (if ordered) came with a CD containing the latest documentation for all
Dynon products (also available a
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. Vis
to view and contribute to the latest
version of these documents.
You can also visit
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.