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dannparks
Sergeant Major
Gender: Male
Location: Parkside Airpark, Battle Ground, WA
Registered: Oct 2006
Status: Offline
Posts: 391
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 Posted Sunday, February 20, 2011 @ 12:19 PM
I am collecting the gauges for my new panel. I recently got a Falcon dual CHT gauge and discovered the mechanism must have some large magnets in it that play havok with the compass. I can't put it within 5 or 6 inches of the compass without affecting it. I have some basic single ISS gauges that don't seem to cause a problem.
Collin, does your Micro 100 dual CHT guage affect the compass?
Are there specific designs of gauges that are better/worse than others?
I noticed that a number of people mount the compass on top of the panel. Is that to free up space in the panel, or because of the interference?
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Dann Parks • RF4D #4051 N2188 • now flying!
Pictures at: https://picasaweb.google.com/111628310900713778468/RF4D_N2188?noredirect=1
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Collin
General
Gender: Male
Location: McMinnville. Oregon
Registered: Oct 2006
Status: Offline
Posts: 711
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Posted Sunday, February 20, 2011 @ 04:31 PM
Hi Dann,
I don't remember if the the CHT/EGT gauge causing any issues. Opening and closing the canopy on my RF4 changes the compass about 30 degrees.
I moved the compass on top for mainly for room.
http://www.cfiamerica.com/images/2182-panel-flight.JPG
Collin
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Donald
Command Sergeant Major
Gender: Male
Location: Scotland
Registered: Jan 2007
Status: Offline
Posts: 489
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Posted Tuesday, February 22, 2011 @ 04:54 AM
Cannot speak about the instruments but for sure the canopy frame can become magetised. I used to get about 30 degrees of compass deflection when I closed the lid. I eventually borrowed a degausser from a TV repairman and degaussed the frame and that made a huge difference though I felt a bit like Obi Wan Kenobi as I waved the thing about deep in the back garden.
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dannparks
Sergeant Major
Gender: Male
Location: Parkside Airpark, Battle Ground, WA
Registered: Oct 2006
Status: Offline
Posts: 391
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Posted Wednesday, February 23, 2011 @ 11:54 AM
Collin, nice set of Winter instruments! Did you get the airspeed custom made with range markings and zero at 6 o'clock position? What did it cost?
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Dann Parks • RF4D #4051 N2188 • now flying!
Pictures at: https://picasaweb.google.com/111628310900713778468/RF4D_N2188?noredirect=1
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Collin
General
Gender: Male
Location: McMinnville. Oregon
Registered: Oct 2006
Status: Offline
Posts: 711
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Posted Wednesday, February 23, 2011 @ 04:30 PM
Hi,
Cumulus Soaring is a Winter Dealer in the US.
http://www.cumulus-soaring.com/winter.htm
Cost $381
Collin
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SteveBeaver
General
Gender: Male
Location: Columbus, Ohio - USA
Registered: Jan 2007
Status: Offline
Posts: 454
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Posted Wednesday, February 23, 2011 @ 04:36 PM 
One way to deal with troublesome stray magnetism is to magnetically shield the offending instrument with mu-metal, a Nickel-Iron alloy developed for this purpose. This is most easily done with self-adhesive mu-metal tape which you can find here:
http://www.mcmaster.com/#mu-metal-foil/=b5u4vd
It has worked for me in the past both for compass problems in aircraft, and hum problems in stereo equipment.
Steve
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dannparks
Sergeant Major
Gender: Male
Location: Parkside Airpark, Battle Ground, WA
Registered: Oct 2006
Status: Offline
Posts: 391
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Posted Wednesday, February 23, 2011 @ 04:49 PM
Great referral, Steve. I'll give it a try. Thanks.
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Dann Parks • RF4D #4051 N2188 • now flying!
Pictures at: https://picasaweb.google.com/111628310900713778468/RF4D_N2188?noredirect=1
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Jorgen
Captain
Gender: Male
Location: Lund, Sweden
Registered: Apr 2007
Status: Offline
Posts: 835
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Posted Wednesday, February 23, 2011 @ 06:43 PM
Collin,
were the heck did you find my jeans?!
May the 4's be with you/ Jörgen
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Collin
General
Gender: Male
Location: McMinnville. Oregon
Registered: Oct 2006
Status: Offline
Posts: 711
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Posted Wednesday, February 23, 2011 @ 09:44 PM
Hi Jörgen,
Sounds like you give your kids pony rides too.
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