S-TEC 60-2 requires re-trim after altitude hold?

In article ,
Peter R. wrote:
Speaking of the S-Tec 60-2, I am transitioning to a Bonanza V35B that is

Now for the idiosyncrasy: The AP is engaged and the aircraft is holding
perfectly at the desired altitude. However, if I disengage the AP, the
aircraft immediately begins a climb, suggesting that there is a slight
nose-up trim situation that was being held back by the AP.

I have an S-Tec 50. Mine is not connected to the electric trim (not
sure why -- the plane had electric trim as a factory option). The S-Tec
will call for trim if it can't hold the elevator itself (annunciator on
the AP), but it can hold a significant amount of pressure -- enough to
really scare you if you disengage it accidentally or without realizing
the trim situation.

It's not clear from S-Tec's site whether the 60-2 is always installed
in an automatic trim configuration (standard is 'altitude hold with
altitude trim' but optional is 'automatic electric pitch trim'). You
may be seeing normal behavior.

--
Ben Jackson

http://www.ben.com/