SteveF said: Many years ago there was a Gardan Horizon in our hangar with the same compass problem. The sparkies ended up wrapping the fuselage with linked mains extension leads and plugging in a couple of 2kw electric heaters for a few hours in an attempt at degaussing. It didn't work and I can't recall what happened next.
G-AYOL if anyone knows (withdrawn from use in 1984).End quote
Bumping an old thread.
G-AYOL was the first GA I flew in as a kid. Family friend on Jersey owned it and I'd get to passenger (ok he let me fly it in the air) from Jersey to Shoreham. All I knew back then was keep it on a particular heading...nearest thing we had to autopilot in 1970's I guess.