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Old 28-06-2016, 20:19   #1
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Power from a shaft mounted alternator

I recently read an article about shaft mounting an alternator to pick up power from the way on the vessel.
I am planning extended trips in an old (but well loved ) Nicholson 32. Obviously not the fastest yacht over the line she is ideal for me as a heavy cruiser. 'Salty" sports a three bladed prop that I have no idea as yet if ti will turn as I sail. So advice on what one needs to do to get the shaft to spin would be good.
Assuming this can be achieved I am told there are now low rev alternators that can be used to generates power as one sails. If this is true I dont see the drag as an issue as the prop sits down there anyway and as far as I know does not turn at the present. So.....I find I get much more information from people if rather than asking a specific question I start with ......Any thoughts. All responses gratefully received.
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Old 28-06-2016, 20:34   #2
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Location: Tonga
Boat: Amel Euros 41
Posts: 143
Re: Power from a shaft mounted alternator

That's possible but quite difficult to install, and of course that all is already discussed on Cruisersforum

Some boats have shaft generator installed from new. I've seen an original installation on Amel Sharky, very neat.

And you actually, you need a permanent magnet generator not a power hungry alternator to do that. And those are rather expensive.

I don't believe that drag is real issue on cruiser but be afraid of the noise of rotating propeller. That can ruin a nice day of sailing.
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