(PaulaJay1) wrote
I have the original Autocontrol IIIB in my 79 Archer. Lately it has been
flying one dot to the right of course when in GPS/NAV mode. I've set the CDI
scale to 1.0nm full scale on the GPS so the error is only about 0.2 nm. If I
set the heading but to the right a little, we fly right down the line. This
says to me that the autopilot is putting out a small bias to the left that the
GPS/NAV has to constantly correct. Is there a simple adjustment in the
autopilot to correct this? Maybe I should just vent to the newsgroup and leave
good enough alone!

If you have a burning desire to fix this, there is an adjustment on
your nav converter (the box that has the multiposition switch with
labels like Omni, Loc, Loc Rev, Hdg, and Nav). Personally, I wouldn't
mess with it.

Michael