TruTrak Yaw Damper - Manual (Page 3)

TruTrak Flight Systems Yaw Damper Installation Manual
December 2009 1 8300-063 Rev C
Mechanical Installation Considerations
MODULE INSTALLATION
Mounting Considerations
The Yaw Damper module is designed to mount on a vertical bulkhead or horizontal surface in the
aircraft, with the bottom flange level with the aircraft, as shown on the first page. Level to the
aircraft, installation is very important as the knob on the YD module will only remove a slight
discrepancy in leveling. Install the wire connector pointing forward or aft, see installation initial
check out for details. Use aircraft installation standards for mounting and support of the YD
system.
Wiring Considerations
Use AWG #24 or larger wire for all connections unless otherwise specified. The standard solder
pin contacts supplied in the connector kit are compatible with up to AWG #18 wire. In cases
where some installations have more than one component sharing a common circuit breaker, sizing
and wire gauge is based on, length of wiring and current draw on units. In these cases, a larger
gauge wire such as AWG #20 may be needed for power connections. Do not attach any wires to
the outside of the YD or route high current wires within six (6) inch of the module. Ensure that
routing of the wiring is not exposed to sources of heat, RF or EMI interference. Check that there
is ample space for the cabling and mating connectors. Avoid sharp bends in cabling and routing
near aircraft control cables.
RFI/EMI considerations
The YD module is shielded and does not generate any appreciable level of electromagnetic
interference. Moreover, the servo lines (except for power and ground) are low-current and cannot
contribute to RF interference. The servo power and ground lines do have switching currents
through them, but so long as there are no parallel runs of servo power and ground lines with such
things as poorly-shielded antenna lines or strobe light power lines, there is no need to shield the
servo harnesses. The YD module itself has been internally protected from RF interference and
has been tested under fairly extreme conditions, such as close proximity to transmitting antennas.
However, it is always good practice to insure that such antennas are properly shielded and not
routed directly over or under sensitive panel-mounted electronic equipment. Most problems in
this area are the result of improper RF shielding on transmitting antennas, microphone cables, and
the like.