ADVANCED FLIGHT CONTROL SYSTEM
Longitudinal Cyclic Trim Actuators
Longitudinal cyclic trim (LCT) actuators in the forward
and aft upper controls extend or retract to change the
tilt of the rotor heads. LCT reduces fuselage nose
down attitude as airspeed and altitude increase. It also
reduces rotor blade flapping. The result is lower drag
and rotor shaft stress.
NO BREAK - WORK HARDER
The actuators are controlled automatically by signals
from the AFCS computer, or manually, by switches on
the AFCS panel. In the automatic mode, the forward
LCT is controlled by the No. 1 AFCS computer and the
aft by the No. 2 computer. LCT position is shown by
indicators on the center instrument panel.