Dynon Avionics Servo User Manual

Autopilot Servo Installation Guide

Generic (Push-Pull)

This product is not approved for installation in type certificated aircraft

Document 101046-000, Revision F

January, 2013

Copyright © 2009-2013 by Dynon Avionics, Inc.

Permission to print this this manual is granted to third parties

DYNON AVIONICS

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Copyright

2008-2012 Dynon Avionics, Inc. All rights reserved. No part of this manual may be reproduced, copied, transmitted, disseminated or stored in
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Servo Mounting Instructions – Generic Push-Pull Kit 1
101046-000 Rev E

DYNON AVIONICS

Kit Contents

Dynon Part #

QTY

Part Description

100836-000

2

Large Male Rod End

100982-006

1

Aluminum Tube - 8" (untapped)

100975-002

2

AN315-4R Jam Nut

100976-011

1

AN365-1032A Nylon Insert Lock Nut

100977-000

2

AN970-3 Large Flat Washer

100978-003

2

AN960-10 Small Flat Washer

100979-002

4

MS35333-39 #10 Internal Star Washer

100981-000

4

AN3H-3A Bolt - 3/8"

100981-005

1

AN3H-10A Bolt - 1"

SERVO MOUNTING INSTRUCTIONS – GENERIC PUSH-PULL KIT

The generic servo push-pull mounting kit includes some of the basic hardware to mount a servo and
connect to the aircraft controls. This kit can be used in either pitch or roll applications that use a
servo with an output arm (not suitable for use with pulley/cable servos). Some additional fasteners
(not supplied by Dynon) will be required depending on the installation method chosen.

When installing the servo, you must first determine a mount location for proper interaction with the
existing control system. This spot must allow the servo arm and associated linkage to move freely
through the entire range of travel. 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.

Once a mounting location has been determined, the next step is to fabricate a mount for the servo
to attach to the aircraft. Generally this will be a bracket made of sheet metal or corner stock. We
recommend using 6061 T6 aluminum with a minimum thickness of 0.050” for the best balance of
strength to weight.

When fabricating a mounting bracket, refer to the included servo dimensions. Leave ample room for
the arm and attached linkage to move through a complete range of motion without interference. We
recommend that all 4 of the included AN3H-3A bolts be installed with the MS35333-39 star washers
and AN960-10 flat washers to secure the servo to a mounting bracket. All AN bolts supplied by
Dynon have drilled heads for use with safety wire. It is up to the installer to decide the attachment
method for mounting the bracket/servo to the aircraft.

Before the linkage can be installed, the included tube needs to be trimmed to length and tapped. 8"
of tubing is supplied, and a small amount of this tubing can be used as spacer(s) if needed. Spacers
can be used to reduce the offset angle between the servo end of the rod and the control system. The
inner diameter of this tube is 0.213"; this is the required diameter for both the #1/4-28 tap at both
ends of the push-pull rod, as well as for a #10 bolt through a trimmed spacer. Spacers used to
alleviate linkage angles should be limited to a maximum length of 1.0" to reduce excess flexing in the
control system.

Servo Mounting Instructions – Generic Push-Pull Kit 2
101046-000 Rev E