3-6
Climb-out/Enroute
to armed. For example, if, during the natural course of flying the
commanded indicated airspeed while in IAS mode, the aircraft
crosses the altitude bug value, the autopilot will transition out of
IAS mode and into Altitude Hold mode. In order to prevent this,
and instead fly an unterminated IAS climb or descent, press the
“IAS” button on the autopilot a second time which will result in the
armed (cyan) ALT button extinguishing and leaving only a green
IAS button.
In aircraft equipped with pitch trim only (no separate pitch servo),
this mode is still functional but may feel less precise than those
aircraft that also have a pitch servo. In these cases, the aircraft
IAS may vary by as much as 5 knots around the target IAS as the
trim system works to hold the target IAS.
The minimum settable IAS bug is V
so
and the maximum settable
IAS bug is 185 KIAS.
The only location to set the IAS bug is via the dedicated IAS knob
on the autopilot control panel. The knob has a push-to-sync
capability that will sync the target IAS to the current aircraft IAS.
The autopilot modes annunciator indication is a green “
IAS
”.
There is no armed (cyan) IAS mode.
VERTICAL SPEED (VS) HOLD MODE
Vertical Speed Hold mode is entered by pressing the “VS” button
on the autopilot control panel. The system will light the control
panel button in green, turn the VS bug solid and adjust the aircraft
climb/descent rate as required to match the bug setting.
Because ALT defaults to armed, if an unterminated VS climb or
descent is desired, a second press of the “VS” button on the
autopilot control head may be required. This will prevent an
altitude capture. For example, if during the natural course of flying
the commanded vertical speed while in VS mode, the aircraft
crosses the altitude bug value, the autopilot will transition out of
VS mode and into Altitude Hold mode. In order to prevent this,
and instead fly an unterminated VS climb or descent, press the
“VS” button on the autopilot a second time which will result in the
armed (cyan) ALT button extinguishing and leaving only a green
VS button.