System Planning
2-6 SkyView System Installation Guide - Revision K
ferrous material such as electric turn coordinators and control surfaces). Thus, you must avoid
mounting the module close to sources of dynamic magnetic fields, avoid wires that carry large
amounts of current, and use non-magnetic fasteners for installation. Dynon’s general rule of
thumb is that 1 to 2 feet between the module and sources of magnetic fields is generally good
enough, but 2 or more feet is better.
Use of stainless steel mounting hardware is not recommended as it is not always
non-magnetic.
Move a handheld compass throughout the space surrounding your intended
location to get a rough idea of the suitability of the area. Note that this test should
be done with major aircraft systems operating (e.g., strobe lights and radios on)
because some systems can cause magnetic interference. If the compass needle
deviates significantly from magnetic North or cycles back and forth, the location is
not ideal for ADAHRS installation.
Figure 2–ADAHRS Installation Orientation
An ADAHRS module should be mounted within one degree of parallel to all three aircraft axes,
with the pneumatic fittings facing toward the front of the aircraft. The module’s mounting tabs
must be on the bottom. The label must be on the top. Figure 2 shows the correct orientation of
the ADAHRS as it would appear if you were above the aircraft, looking down at it. The module
will not operate properly if it is rotated or inverted in any other orientation.
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