User guide

LAT ARM Localizer

Aircraft will follow the heading bug on the HSI until the CDI needle deflection is less

than 80% AND the Current aircraft heading is within 30 degrees of the CDI course.

The AP/FD status on the EFIS will show ARM unit switching to NAV mode.

GPS

Aircraft will follow the heading bug on the HSI until the CDI needle deflection is less

than 80% AND the Current aircraft heading is within 90 degrees of the CDI course.

The AP/FD status on the EFIS will show ARM unit switching to NAV mode.

LAT OFF Any GPSS steering commands from the navigation radio will be passed through to the

Autopilot in the AF-ARINC module.

As long as the aircraft has enough of a turn and the LAT Gain is high enough, the aircraft should try and

use a standard rate turn for the bank angle.

AP/FD Vertical Modes

VER ALT Aircraft will follow the Yellow Altitude bug on the altimeter tape.

VER ARM Aircraft will follow the Altitude bug until the CDI & GS needle deflection is less than 80%,

once this occurs the Aircraft will follow the vertical NAV source. If the vertical GS needle

is lost in ARM or NAV mode the Autopilot and Flight director will switch back to

following the altitude bug after 5 seconds. This enables vertical guidance to the

altitude bug on a missed approach.

VER OFF Any GPSV steering commands from the navigation radio will be passed through to the

Autopilot in the AF-ARINC module.

VER FPL Aircraft will follow the internal flight plan vertical navigation crossing altitudes and will

descend per the flight plan if a glide-angle is setup and vertical navigation is enabled.

Changing Autopilot Mode

You can change autopilot modes by pressing EFIS -> AP/FD and then the LAT or VER button. The

joystick on the AF-4500 can also be used as a shortcut. LEFT and RIGHT cycle between Lateral modes

while UP and DOWN cycle through Vertical modes. Moving the joystick to the left for about 1.5 sec, for

example, will prompt the user "AUTOPILOT MODE L:HDG?". Press the joystick in to Confirm.

AF-4500 Joystick

UP (V-ALT)

LEFT (L-HDG) RIGHT (L-ARM)

DOWN (V-ARM)