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From: Chuck Morford (no email)
Date: Mon Nov 01 2004 - 19:10:11 EST
One reason I can think of:
The greater density of water will spin a smaller
prop faster, thereby generating more energy than
an equivalent windspeed, i.e. 5 knots through
water produces more energy than 5 knots through
air. Don't have the numbers at hand, but I would
guess it to be more than 3 times as much.
> I don't understand WHY anyone would drag
> windmill in the water? If you're sailing,
> you've got enough wind to spin it right? If
> you're motoring then you've got an alternator
> spinning right? What am I missing here?
>
> I like the idea of a propshaft mounted
> alternator, especially for larger boats. It
> seems simple and logical.
>
> However, it seems that a wind generator is a
> lot more versatile and just as, if not more,
> efficient than the propshaft mounted alternator
> arrangement. In addition to being more
> versatile since it works on the hook (assuming
> there is wind) as well as at sea. I understand
> needing solar and wind, or solar and propshaft
> alternator, but WHY would anyone need both a
> Wind Gen and Water Gen?
>
> I'm very confused...
>
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