SkyView HDX Pilot’s User Guide – Revision B 8-1
8. Autopilot Operation
This section guides you through the functionality, symbology, and operation of the integrated
Dynon autopilot in SkyView HDX. It assumes that the Autopilot servos have been properly
installed, calibrated, tested, and tuned according to the procedures in the SkyView Classic / SE /
HDX System Installation Guide and the SkyView Autopilot In-Flight Tuning Guide. For
instructions on how to change Autopilot controls see the SkyView Classic / SE / HDX System
Installation Guide.
Autopilot Safety Features
Servo Failsafe
The Dynon Autopilot is designed with multiple failsafe features to ensure that the autopilot can
always be disabled, even in the event of electronic or mechanical failure.
First, the required disconnect switch commands the servos to disengage directly, ensuring that
you can always override SkyView HDX’s commands.
Next, the Autopilot servos are designed so that you can always overpower them and move the
control stick/yoke manually with minimal force, even when the servo is operating at its highest
torque output capability.
When the servos are not receiving power, they revert to their normal power-off state. Thus,
simply opening the Autopilot circuit breaker or fuse on in the aircraft will completely inhibit the
Autopilot servos from controlling the airplane.
However, SkyView does continuously look for the presence of powered-up servos, even when
the autopilot is disengaged, and will show an error condition if they are not communicating
with the rest of the system. Thus, Dynon recommends that the servos be powered on
whenever SkyView is powered on in routine operation. When the servos are receiving power
but the autopilot is not engaged, the servos draw negligible power.
Finally, in the unlikely event of an internal mechanical failure of the servo, moderate but firm
force on the control/stick yoke will physically decouple the servo internals from its link to the
aircraft control surface. This action breaks a specially-engineered shear screw which is designed
to yield in this scenario to preserve positive pilot control of the aircraft.
Level Mode
The autopilot’s Level Mode (or Straight and Level Mode) will immediately attempt to reach zero
vertical speed and a roll angle of zero. It will not attempt to fly the aircraft to any previous
altitude or track and it will not respect any bug inputs. When activated, Level Mode will cause
the autopilot to engage if it was not already engaged.
Level mode can be activated in two ways:
• The LEVEL Autopilot menu button as described in the following sections.
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