ADVANCED FLIGHT CONTROL SYSTEM
Differential Airspeed Hold Actuator
The differential airspeed hold (DASH) actuator holds
pitch and airspeed constant during steady flight. It also
provides a positive gradient for the cyclic control stick.
This makes helicopter airspeed proportional to stick
NO BREAK - WORK HARDER
The DASH actuator is composed of two separate
sections at the ends of a metal tube. The upper section
is controlled by the No. 1 AFCS computer. The lower
section is controlled by the No. 2 computer.
Collective Control Driver Actuator
The collective control driver actuator (CCDA)
automatically moves the thrust control lever to hold
altitude steady. It also acts as a magnetic brake for the
lever. The CCDA is controlled by the No. 1 computer.
It is located near the upper end of the DASH actuator
in the flight controls closet.