Today's Message Index:
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1. 02:16 AM - Re: Rear seat vents handle (Greg McFarlane)
2. 02:16 AM - Re: Rear seat vents handle (Greg McFarlane)
3. 05:58 AM - "Magnetic Anomaly" - Degauss rear seatbelt cables (Terry Moushon)
4. 08:43 AM - Re: "Magnetic Anomaly" - Degauss rear seatbelt cables (bhoppe2)
Message 1
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| Subject: | Re: Rear seat vents handle |
Good quality key rings work a treat, drill one hole, easily fitted, good grip,
light weight. Cheers from Western Australia
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=459283#459283
Message 2
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| Subject: | Re: Rear seat vents handle |
Good quality key rings work a treat, drill one hole, easily fitted, good grip,
light weight. Cheers from Western Australiauj
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=459284#459284
Message 3
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| Subject: | "Magnetic Anomaly" - Degauss rear seatbelt cables |
Recommendation: Degauss the rear seat cables before installation.
Like many others, I mounted my GMU22 Garmin magnetometer in the top center of the
tail section, aft of the cargo bay bulkhead and my installation passed the
interference test. That said, for my first 20 flight hours or so, I frequently
experienced (1 or two per flight) a "magnetic anomaly" on my Garmin G3X touch.
It was suggested that I check the rear seatbelt cables for magnetism using
a cheap auto dashboard compass. Before removing the cables, I moved the auto
compass along the cable and found areas on the cable that made the compass spin
like a top. My good friend lent me an old (1978) Radio Shack hand held degausser.
I removed the cables from the plane and took them home (did NOT want
the degausser anywhere near the aircraft). On my workbench, I moved the degausser
along each cable (2-30second passes)....and retested using the auto compass.
The cables now did not move the needle at all. The cables were reinstalled
with an extra washer at the longeron to prevent the cable from moving at the
yoke. I have had 9 flights now without any "magnetic anomalies"... I have closed
this issue.
Message 4
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| Subject: | Re: "Magnetic Anomaly" - Degauss rear seatbelt cables |
I had the same problem with the magnetometer mounted in my RV-10 tailcone using
the SteinAir bracket. A cheap magnetic compass would swing when moved along
the outside of the tailcone. At first, I presumed the AN bolts were magnetized,
but they were not. I replaced them with SS bolts just to be safe. The rear
seat shoulder harness cables were the problem. I demagnetized them with an old
Radio Shack 100w soldering gun. I replaced the soldering tip with a 3-turn
coil of 10 gauge wire and passed the cables through the hole in that makeshift
coil. It worked like a charm. No more problems with the G3X compass.
A friend recently tried to move his wet compass to the top of the windshield in
his Cessna Skymaster, but he could not get it adjusted. We used that same soldering
gun to demagnetize the overhead structure, but only using the side of
the case of the soldering gun. It fixed his problem, too.
--------
Bruce Hoppe
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=459293#459293
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