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magnetometers

 
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bobbypaulk(at)comcast.net
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PostPosted: Wed Apr 03, 2019 5:55 am    Post subject: magnetometers Reply with quote
This is a story you won't find anywhere else. While building a fast build kit I had my galvanized rudder cables laying on a table. Someone ( not me ) moved them onto a DC welding machine that was used several times in the next day or two.

I had mounted my magnetometer way back in the tail ( right between the rudder cables ) to get it away from all the electronics and antennas. When checking out the remote compass outside without anything on I moved the rudder pedals and got 200 to 300 degrees deflection. No amount of degausing would get a usable compass. I moved it up and behind the baggage compartment and it became the most accurate compass I have flown behind.

Another note FYI: A wet compass is influenced if it is too near a non electric tachometer. Works fine with engine off but changes a few degrees with RPM when the engine is running due to the magnetic clutch in the tach.

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