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INTRODUCTION
The elastomeric based rotor system on the AS350 creates in flight dynamic forces
that cause feedback loads in the cockpit flight controls. To counter act these forces
the AS350 is equipped with a single hydraulic system that assists with the pitch
changes and dampens out dynamic feed back on the main and tail rotor blades.
GENERAL
The hydraulic system is comprised of a reservoir, variable delivery pump,
a hydraulic distribution block, 3 servo control manifolds, 3 main rotor servos, a single
tail rotor servo and on certain models a yaw load compensator.
The reservoir is mounted on the main gearbox and gravity feeds to the hydraulic
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pump. The pump is belt driven
off of the engine to main gearbox drive shaft and provides pressurized fluid for
the system.
The hydraulic distribution block houses a hydraulic filter, a pressure
regulating valve, a hydraulic pressure switch, a
hydraulic test solenoid and on certain models a hydraulic filter clogging indicator.
The hydraulic filter removes contaminates from the hydraulic fluid and the
clogging indicator gives a visual warning of a impending blockage. The
pressure regulating valve keeps the systems pressure at a constant and the
hydraulic pressure switch activates the red HYD light on the warning caution panel and
the horn. The hydraulic test solenoid valve,
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AVIATION LIBRARY
