>Well I have this really neat instrument panel all designed for my RV-4, but
>may have a problem. I have the compass planned to be mounted on the panel
>near the turn coordinator. But on the bench, the TC swings the compass
>greatly. I know the easy solution is to move the compass, but I was hoping
>the retain this design. Is it possible to shield the TC in some manner?
The IDEAL material to reduce stray magnetic fields around
both potential antagonists -and- victims is a stuff called
Mu-Metal . . . not easy to get and not easy to work with.
You can try an experiement to see if it's worth the trouble.
Get some ordinary galvanized sheetmetal that comes in rolls
about 8" wide and used for valley sheeting between roofs.
Cut a strip wide enough to cover the depth of the turn
coordinator and long enough to wrap around the outside
case about three layers deep. The metal is soft, thin and
pretty easy to work with. Hold the sheet-metal cocoon in
place with several fat rubber bands or some wraps of
tape.
Now, see what effect the T/C has on the compass. If you're
lucky, the sheet metal you've put on does the trick and
you can slip this shield off to be replaced later after
the T/C is installed. Use Tie-Wraps or lacing string to
hold it in the final installation. If you're not so lucky,
you'll find that the effects are considerably reduced but
still to strong to swing out when the compass is installed.
In this case you may have to go for the high-dollar, finger
slicing stuff.
Bob . . .
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