I have not RTFM on Geofa's B33 but when I click on step to the left on the autopilot heading round knob to make a a/p turn, the plane starts to loose altitude even with the a/p Alt button "on".Does the B33 a/p Alt mode desengage on turs?Thank you

It shouldn't-are you watching the trim lights on the right side of the unit-it might need to be trimmed again.As we know also-the fs autopilot is a little squirly in some phases-and in fact the person who is working on the flight model is doing some work on this (it is also connected with that). Keep trying, reporting what you find, and we will see what we can do.http://members.telocity.com/~geof43/geofanim2.gif