SkyView System Installation Guide - Dynon Avionics

Autopilot Servo Installation, Configuration, and CalibrationThe servo arm must not rotate even near to the point called OVER CENTER, thepoint at which the primary aircraft control would “lock up”. Over center happenswhen the angle between the servo arm and the attached push rod becomes sogreat that the control system cannot drive against the servo arm. To protectagainst this possibility, a Range of Motion Limiting Bracket is supplied with eachDynon Avionics servo. These brackets are drilled so that they can be mounted atdifferent angles as required (18° intervals). The brackets are supplied for theprotection of the pilot, and we recommend that the Range of Motion LimitingBracket be installed to ensure that an OVER CENTER condition cannot occur.During normal servo operation, the Range of Motion Limiting Bracket should neverbe used. It is only intended for use as a safety mechanism in the SkyView Autopilotsystem. When installing the Range of Motion Limiting Bracket, only use thesupplied screws. Using longer screws to install the bracket, you will penetrate anddamage the electronics.Once a suitable mounting point for each servo has been determined, the next step is tofabricate a mount for the servo to attach to the aircraft. Generally this will be a bracket made ofsheet metal or corner stock. Dynon recommends using 6061 T6 aluminum with a minimumthickness of 0.050” for the best balance of strength to weight. When fabricating a mountingbracket, refer to the servo dimensions below. Be sure to leave ample room for the arm andattached linkage to move through a complete range of motion without interference.In normal operation, autopilot servos can reach temperatures that can be veryuncomfortable to, and perhaps cause burns to unprotected skin. Thus, servosshould be mounted in an area, or in such a manner to prevent accidental skincontact. If mounting the servo in an exposed area is necessary, a shroud should beinstalled (that doesn’t restrict ventilation) that protects against accidental skincontact with the servos.10-4 SkyView System Installation Guide - Revision O