---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Wed 02/20/19: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:16 AM - Re: a compass question (Hitchflight) ________________________________ Message 1 _____________________________________ Time: 02:16:24 AM PST US Subject: Europa-List: Re: a compass question From: "Hitchflight" Positioned high up works for me as well. The point of correct compass position was underscored to me when my small Smiths Compass leaked fluid at high altitude and became stuck. Consequently giving a wrong indication of direction. Back in the hangar I removed the Smiths compass, thinking that I would fix sometime. Meantime I intended to use a large new Garmin Compass that I had. I lined up the aircraft with known directions. Then exercised a compass swing check. The deviation was consistently severe, but also varied in severity dependant on direction. I concluded that nearby wiring was disturbing the Garmin Compass unit. A few days later went to Cooke & Son in Hull and they fixed my Smiths Compass. Back home put the unit back in position. Perfect, no deviation. So I guess my comment would be some compass units seem more sensitive to interference than others. The Smiths uses a special oil and dampers. The small size of the Smiths unit was perhaps also a factor. For those who do the UK biennial IRR check, the compass is one of the required instruments, though weirdly a GPS isnt.. Bob Read this topic online here: http://forums.matronics.com/viewtopic.php?p=487707#487707 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/europa-list Browse Digests http://www.matronics.com/digest/europa-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.