ROBINSON
MODEL R44
SECTION 7
SYSTEMS DESCRIPTION
REVISED: 21 FEB 2014 7-21
AUDIO SYSTEM
A four-place intercom/audio system is standard and is
controlled by a small control panel above the avionics
stack. The ICS volume knob controls intercom volume but
does not affect radio volume. The VOX squelch knob is
used to set the threshold volume at which the intercom is
activated. When the VOX knob is turned fully clockwise,
keying is required to activate the intercom.
A toggle switch allows selection of PILOT ISO mode in
which the pilot is connected only to the radio while the
copilot and rear passengers remain connected to each other
via the intercom. A music input jack is located on the aft
seat console. This input is muted when the intercom is
active, when transmitting, and during reception of radio
signals.
Headset jacks are located in the ceiling near each seat. The
cyclic grips are equipped with either transmit and intercom
buttons or trigger-style intercom/transmit switches. For
the trigger-style switch, the first detent activates the
intercom and the second detent transmits. Additional
intercom buttons are located inboard of the rear seats and
on the left forward floor.
Audio control panels from several manufacturers are offered
as options in place of the standard intercom system. Pilots
should consult the manufacturer’s operating instructions if
an audio panel is installed.
OPTIONAL AVIONICS
A wide range of optional avionics are available for
the R44. It is not practical to provide a description of
all equipment in this manual. All aircraft are delivered
with the manufacturers’ operating manuals for each
piece of installed equipment. Pilots are referred to the
manufacturers’ manuals for detailed operating instructions.
Good practice dictates becoming familiar with installed
equipment before operating an aircraft.
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