ADVANCED FLIGHT CONTROL SYSTEM
A control panel on the canted console allows manual
selection of four features of the AFCS:
A system select switch allows the pilot to select
either or both systems or to shut down both.
A light on the master caution panel comes on
when a system is shut down, either manually or
Two altitude switches allow selection of
barometric or radar altitude sensing as input to
the system. Barometric is normally used for all
forward flight. Radar is normally used when
A heading switch allows engagement of
automatic turning to a preselected heading.
Heading selection is done at the pilot or copilot
horizontal situation indicator (HSI).
A switch allows selection of automatic or manual
cyclic trim control. When manual is selected,
extension or retraction is controlled through
separate forward and aft switches on the panel.
Two computers in the electronics compartment convert
sensed information about helicopter flight condition into
electronic signals. Input to the computers comes from
attitude gyros, the pitot static system and sideslip ports,
and transducers on the stick and pedal controls. Built
in test equipment (BITE) in each computer allows the
complete system to be checked out on the ground.