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Subject: Re: [worldcruising] Towed Generators
From: Stan Nackdymon (rostan@XXX.XXX)
Date: Sun Sep 15 2002 - 01:46:42 EDT
Who is the Oz manufacturer??
Stan
Barry Brazier wrote:
> Hi John
>
> I assume they mean power to charge a 12V battery. with a greater voltage
> at 8 amps and 12 volt that gives 96 Watt. If this rune for 24 hours this gives approx. 2 Kwatt.hours
> of stored energy. Of course the machine would have to use may be 17 Volt and use at lot more energy to store 2 KWH. No system is 100% efficient.
>
> The unit that was available in Oz produced 15 to 17 amps at boat speed.
>
> I am going to visits an outboard wrecker soon and see if I can get a long shaft OB arm I can hang a 14" prop to and mount an alternator. I will look for an alternator is one of the alternative energy shops in town.
>
> I used a 96 Watt solar panel. but that was not enough for what I would like to have used. Wind generators don't produce enough when sailing down wind. And I don't like wasting fuel by running the main engine to top up the batteries. I could get more solar panels but I don't want to look like a Christmas tree.
>
> Regards
>
> Barry
> ----- Original Message -----
> From: truelove39@XXX.XXX
> To: worldcruising@XXX.XXX
> Sent: Saturday, September 14, 2002 10:49 AM
> Subject: Re: [worldcruising] Towed Generators
>
> Hi Barry,
>
> Thanks for the URL. I read the web page with interest, but I must say that
> their statement, "...the Aquair produces 8 amps (100 watt-hours per hour)..."
> made me nervous. Watt-hours per hour? I don't think so! That, plus their
> statement "In ideal conditions, the UW puts out 8 amps at 12 VDC..." concerns
> me too, as it smacks of the same marketing tomfoolery that some windgen
> makers indulge in. I keep hoping that the alternative energy folks will
> standardize on output ratings of 14V or 13.2V or something more more
> realistic.
>
> Their numbers, at 6mph (more realistic for a cruising boat) translate into
> 5.2A at 12 volts. As we all know, you can't charge a 12V battery with 12V,
> so, assuming that the device will actually put out, say, 14V (saving some for
> Vdrop) we now have only 4.4A.
>
> Good sailing,
>
> John
>
> ozboats@XXX.XXX writes:
> > http://www.fords-mtm.com/hydro/aquair.htm
>
> [Non-text portions of this message have been removed]
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