Here is a link to a very good article on autopilots on the Avionics West web
page. I think it answers a lot of your questions.

http://avionicswest.com/articles/kno..._autopilot.htm

-Brenor

"john smith" wrote in message
...
I am interested in learning from everyone...
a. What autopilot your aircraft is equipped with?
b. What aircraft your autopilot is installed in?
c. What does your autopilot use for heading/altitude/attitude reference?
d. What does your autopilot use for loc/gs reference?
e. If your heading/altitude/attitude reference fails, what functions does
you autopilot still provide?
f. With failed heading/altitude/attitude reference, does the loc/gs still
function?