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I have a panel mounted compass in my IVP. It
is mounted right in the middle of radios, clock, wiring controlling FADEC, and
wiring for many other things. As different equipment and avionics are
turned on, the compass swings as much as 45 to 90 degrees. I ended up
mounting an external pegasus to the far left face of the panel. It is out
of the way and does a great job. The two compasses disagree by huge
amounts in flight.
Bottom line is be aware that all those little
electrons running through any coiled wire for avionics and other items makes a
magnetic field which your panel mount compass might not like.
Dan Reagan
Lancair IVP 450+ hours
Cincinnati
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