I quickly reset our AFCS and enabled altitude hold
during our momentary respite.
The airplane will turn right to follow the approach sequence, but hold altitude until you release altitude hold
The altitude hold
function of the AFCS will overshoot selected altitudes due to limitations on its control authority, especially with a low power setting and high rates of descent.
is a great tool, but an instrument scan is imperative when there is no reference to the horizon.
Maj Neaderhiser turned the aircraft away from the target area, turned off the altitude hold
, set max range airspeed, and reduced the throttle setting in an attempt to lower engine temperatures.
The DFC90 has all the standard vertical and lateral modes of operation of a turbine-class autopilot system, including Flight Director (FD), Altitude Hold
(ALT), Airspeed Hold (IAS), Vertical Speed Hold (VS), Heading (HDG), and Navigation (NAV, APPR, LOC/GS, GPSS).
Missing is a trim servo, but the system is smart enough to send signal commands to an existing pitch trim motor to balance the elevator forces when the altitude hold
and climb/descent modes are engaged.
You may not have such equipment but still have the capability to fly the hold in heading and altitude hold
An additional autopilot upgrade, featuring Heading/NAV hold, Altitude Hold
and a Go-Around mode, was announced at Farnborough in July.
The autopilot was on altitude hold
, and all were comfortably confident that we were at a carefully computed safe altitude.
There's also a built-in digital autopilot with altitude hold
and ILS capture, a full air data computer with fuel burn and fuel totalizing functions, a flight planning system and digital monitoring of up to 32 engine gauges.
Mode annunciators include AP, for autopilot active, FD, for flight director active, ROL, for roll mode and ALT, for altitude hold