"Ryan Ferguson" wrote in message
...
The simple answer is that the autopilot compares the heading bug to CDI
deflection to determine the amount and rate of aileron input. To prevent
a reoccurence of that problem, set the heading bug to the final approach
course (or whichever segment you wish to track) and you'll be set.

I have an Altimatic III (a Century product) in my airplane and it works
essentially the same way.

Is this true of the newer S-TEC autopilots as well? My club plane is
getting a 55X installed soon.