In article om,
"Skip Gundlach" wrote:

Meanwhile, one of the guys working with me in the rudder restoration
suggests using a "ducktail" on the rudder to improve the autopilot
stability (it hunts busily, now, and has since we have owned the
boat).


Check how much play/flex is in the autopilot system. I found that a very
small amount of play translated into a whole lot of wandering. After
that, playing with the gain & damping settings was more consistent.

--
Jere Lull
Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD)
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