There is another thread comparing pendulum servo (Monitor) and auxiliary rudder
(Hydrovane). Pendulum Wind Vane vs Auxiliary Rudder Vane
I haven't sailed with the Cap Horn but people claim it is very good especially in light air. The only complaint I've heard is one fellow had a mystery problem with the angle steering
rod bending or something like that. He replaced the rod with new but vane still didn't work as well as it had before. He was working with Yves to try and cure the problem but never heard how it turned out. I wouldn't let that instance scare me as people have had problems with all different kinds of vanes.
There are a number of Pendulum Servo vanes: SAILOMAT WINDPILOT: selfsteering under sail A few Superlatives A few Superlatives Aries http://www.selfsteer.com/products/index.php
These are just a few.
, Scanvik, and Hydrovane
are some manufacturers of auxillary rudder
system. I've got the WindPilot Pacific Plus on my current
boat and it's uncanny how well it steers from near zero boat speed on up. Haven't had the fun of using it in winds over 40mph but below that speed, it's been superb.
The dissimilar metal problems with the Aries
can be easily handled. Disassemble it and reassemble using liberal amounts of lanolin or TefGel where you find stainless and aluminum
. On my relatively early Aries, the bronze gears did not come in contact with the aluminum so wasn't an issue. Believe they've handled the dissimilar metals issue with the new Danish made Aries. BTW, is Nick Franklin's daughter still selling replacement parts
for the one's he made???? Miss Nick, he was a delight to do business with.