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Franrick said..
From my experience with autopilots, up until now there doesn't seem to have been an autopilot made for smaller to medium boat that does the job well. I have had several over the years that have done the job but none actually kept the boat on the desired course and continually moved anywhere up to 30 degrees off the desired direction. Sail trim, balance, and rudder trim make a difference but I have seen some boats going all over the place on auto's.
I find that if I balance or trim the sails to enable the pilot to keep reasonably close to the desired course that the result is usually a loss of boat speed and while I no longer race we all like to make decent progress, particularly on longer passages.
A lot of my sailing is either single handed or short handed and my two ST2000's have been super reliable until now. Now that one seems to have retired I am considering the EV 200 as a replacement but would rather repair or replace the 2000 if the EV doesn't do a better job.
If you believe Raymarine then the EZ's are what we have all been waiting for but I won't be parting with $2k+ without the knowledge that I am getting something better for my money.
I have been thinking about this for a couple of days, and specifically what is "good" control from the autopilot.
i have a Raymarine EV200, fitted to my Cavalier 37.
Motoring this week we had around 20 knots, about 45 degrees off the stern, swell was short chop. The auto pilot was responding quickly, moving the wheel around 10 degrees to keep the boat on course.
Earlier sailing, into the wind on the beam degrees around 18 knots gusting 25. We probably had a bit to much sail up. If I had been racing I would have had crew on the main sheet adjusting the main to hold course. The auto pilot was moving not adjusting the wheel a lot and allowing the boat to point higher in the gusts and then returning to course when the wind dropped. This is what I would do if hand steering. The course variation would have been up to 30 degrees. The boat kept moving and was under control at all times. There was nothing dramatic, and at no time did the boat feel out of control. The set heading was maintained, over a period of time. I was happy with this.
I am interested in others thoughts, in this condition and hand steering would you fight the wind and hold a tight course, or allow I the boat to move around a fair bit? Yes, we could have reduced sail a bit, but needed to head down wind later so kept the sail on for that.
it also seems that the autopilot recognised the difference between motoring and sailing and responded differently, which is pretty clever.