Dynon Avionics EFIS-D100 Pilots Users Guide - Manual (Page 74)

Autopilot Operation
EFIS-D100 Pilot’s User Guide 7-15
 NEVER: The HDG and ALT bugs are never automatically modified by turning on the AP or changing AP modes.
Be aware that the bugs are highly likely to be set far away from the current heading and altitude at the time of AP
engagement; this will result in the AP immediately commanding a turn and a climb or descent at time of
engage. When using this mode, we recommend that you verify the EFIS’ bugs settings prior to EVERY
Autopilot engage.
MODE CLEARING CONFIGURATION
In the –CLEAR MODES– section, you can configure whether the autopilot clears the active modes (HDG, TRK, or
NAV; and ALT) on AP disengage. If you select NO, the AP leaves the mode(s) pre-armed when the AP is off. This
leaves the last-used roll mode (HDG, TRK, or NAV) and/or pitch mode (ALT) lights lit on the AP74. You may, of
course, switch to new modes prior to re-engaging the AP. If you select YES, the AP disarms all modes upon disengaging
the AP, turning off all mode lights on the AP74. You must then select the active modes prior to re-engaging the AP
(although if no modes are pre-armed, pressing the AP button causes the HDG mode to be engaged by default).
Clearing modes on disengage is most useful when used in conjunction with the ON MODE ARM pre-select
configuration above. This forces you to explicitly enable (and thus synchronize) the modes you wish the autopilot to
control when you press the AP button.
The default value for this setting is NO, leaving all modes pre-armed after turning off the AP.
Disengage/Control Wheel Steering (CWS) Pushbutton
The primary function of the Disengage/CWS pushbutton is to disengage the Autopilot. While the AP Disengage/CWS
button is held down, the servos are electrically disengaged and cannot control the aircraft. If configured in the EFIS >
SETUP > AP > BUTTON CONFIG menu, the button can also serve as a control wheel steering mechanism, as described
below.