Re: [Amel Yacht Owners] Wind generator on top of the mizzen mast
Bill Kinney <greatketch@...>
Paul,toggle quoted messageShow quoted text
On my last boat I had a Duogen, the wind/water version of the D400. It used the same alternator and blades as the wind only D400. VERY quiet and smooth running by either wind or water. It was an awesome machine as a towed water generator: Sailing at 5 or 6 knots it fed a constant 7+ amps into our 12 volt system. More than enough to keep the batteries fully charged all the time on a passage from Hawaii.
As a wind generator it did not make enough power to pay its way. Yes, it could make 4 or 5 amps…for a few minutes at a time in a big gust. Even in quite windy places it was never a significant contributor to our energy budget over the course of a day.
I think you will be disappointed with the cost/benefit ratio with any wind generator you pick. You would be better off finding a place to add 150 watts of solar panels. They would be better, even in marginal conditions, at putting electrons into your battery over the course of a week.
That said, if you do go ahead with a wind generator, the top of the mizzen is a really bad spot for a reason that you did not mention. Adding the weight of a wind generator 10 meters up in the air is NOT a good thing to do for a sailboat. Adding 17kg (the weight of a D400) 10 meters up will have a similar effect on the stability as taking about 110 kg off your keel. Very round numbers, but you get the idea. The boat heels more in the wind, needs reefing earlier, etc. It IS a significant effect.
Lower is better for anything heavy, but of course the lower it is, the less wind it sees… no free lunch!
Port Canaveral, Florida,
Heading north in a day or two.