Well I was that other owner of a Windhunter. I wish you luck.

The system worked-ish to windward but caused the boat to yaw through 80-90 degrees downwind. I spent 3 months trying different settings, sail set up, etc before coming to the conclusion that it was not fit for purpose other than to provide electricty via the towed turbine.

The problem is that when in any kind of a sea the baot accelerates down a wave and the windhunter responds quicker than when the boat is decelarting up the next wave. The result is the yawing or no steering dpeending upon whether you set the response time for going up ot down the waves, we never found a happy medium execpt in calmish conditions when it worked reasonably but at the expense of about a knot of boat speed and in calm conditions you need all of the speed you can get.

It was a shame that the designer/owner, Richard, could never iron out this fundemental problem because it had the potential to provide both self steering and power for the batteries. He was a helpful chap but believed in his product beyond its capabilites.

We have now replaced the beast with a Monitor that just works