I am also interested in a
windvane for my Prout. However, as Gord mentioned, they come with a
price of not only
money, but bulk and weight on the stern. I am not sure the acceleration problem would apply to a Prout.
water sailing">Blue
Water Sailing had an article about windvanes on performance
boats that indicated success, but not in all situations. It was written by world cruiser Evans Starzinger, who hangs out on the Cruising World BB at times.
The
hydraulic steering of the prout could pose a problem because of the high number of turns required to get a sufficient rudder response.
It looks like the best bet would be a
hydrovane. They use their own rudder and so don't require the linkage to the
wheel. This also gives you a back up rudder.
One of the neater things I see on
boats is a windvane that is driven by a tiller auto pilot. The tiller pilot provides directional input to the wind vane, but the wind vane provides the power to steer the boat. This reduces
current draw and will
work when motoring. This would seem the best of both worlds.
Check
http://www.hydrovane.com/ They even have a couple of photos of Prout installations.