Roy Smith wrote in news:roy-E354B6.12140925092004
@reader1.panix.com:

I don't fly too many coupled approaches, so forgive me if this is a
simplistic question.

We were flying a coupled VFR/practice ILS in a Debonair with a
Century-2000 A/P. The heading bug was set about 10 degrees to the left
of where it should have been, resulting us tracking to the left of the
localizer centerline. The CDI was about 1/2 scale "fly right"
deflection but stable.

I've never used that autopilot, but the behavior is different from what I'm
used to. The flight directors I've used completely disregard the heading bug
when they couple to the localizer. I generally set the heading bug to
whatever course ATC give me for the intercept, and then when the a/p captures
the localizer, it turns to whatever direction it needs to hold the needle
centered, and the heading bug can be turned to any heading you want, with no
effect at all. The heading bug is only active when the a/p is set to hold
heading, not when tracking a nav signal.

What does the manual for the Century-2000 say?

--
Regards,

Stan