Builders,

I have been flying my CH750 for over 5 yrs now. Have a Precision model vertical card compass that I have never been able to keep within 25-30 degrees of correct. I recently bought a new Air Path Whiskey compass and installed it with the same results. Got to researching a bit, and discovered the "degaussing" phenomenon with regards to the magnification of welded steel parts and its effect on a compass. I've read everything from where you can use a TV monitor-type degausser, to you must use a massive industrial degausser, to wrapping the cord of an extension light around your steel parts and leave the light on for 24 hrs will demagnify the steel.

Do any of you guys have any actual sucessful experience with degaussing steel parts in your plane you could share, and has anyone else had this same compass inaccuracy issue with their Zenith?

Jimmy Young

Houston TX

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The coil puts out an alternating magnetic field, turn it on close to the cabin frame struts and move it around in small circles.  Slowly back away and then level the coil so the field Is not directed towards the plane and then turn it off.  If you turn it off close to the struts it will polarize or magnetize the metal. BE SURE to remove your compass from the plane and put it far away from the area. 

Hope this helps, give me a call if you have more questions.

David 360-670-9725

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