* Leave the autopilot on in heading mode to help you control attitude but turn off altitude hold
. If the autopilot turns off in the turbulence, turn it back on to help you control the aircraft ...
"For about three years my autopilot will abruptly climb and descend up to 300 feet in altitude hold
and will climb and descend in a set vertical rate climb or descent.
With your current autopilot, how many times have you been given a fresh altimeter setting and had to rejigger the altitude hold
so it matches?
This requires the UAV simulation to have a velocity hold, altitude hold
, and a directional (heading hold) autopilot.
I safed up the armament switch and set auto-pilot to altitude hold
. We radioed the Supervisor of Flying and requested his assistance in reading applicable checklists, which allowed me to focus on flying.
Suddenly, our automatic flight control system (AFCS) kicked off, which disabled our altitude hold
. We began to rapidly descend toward the water.
To improve the handling qualities of its special operations helicopters, the Air Force Special Operations Command equipped all Pave Low MH-53Ms with an "altitude hold
hover stabilization system" capable of near-automatic landings.
Upon intercepting the red/amber interface on the stabilized glide slope indicator (SGSI) at .5 miles, the pilot depressed the collective trim altitude hold
Press A to toggle autopilot on or off; Alt-A for altitude hold
; Alt-H for heading hold, Alt-N for NAV 1 hold, Alt-S for speed hold; Alt-V for vertical speed hold; Alt-W to level wings and Alt-M for instrument approach hold.
He believed the reason was that the autopilot was in attitude mode, not in ALT (Altitude Hold
The autopilot is controlled through a virtual panel or a dedicated hard panel and offers altitude hold
, vertical speed and altitude preselect.