"Newps" wrote in message
...
A one axis autopilot is a wing leveler. It may have features that allow
it
to track a radial or GPS course or even to follow a heading bug or all
three. Even then it's a one axis autopilot. A two axis autopilot does
that
plus holds altitude. A three axis autopilot will also control yaw. You
see
these on a lot of V tail Bonanza's or any plane that is not that stable in
yaw. Some of these planes may have two separate autopilots. The first is
a
typical two axis and a second totally separate autopilot to control yaw.
A
buddy of mine has that setup on his Bo.



A yaw damper is a separate autopilot? Hmmm...I can see that!