Jaxie, you're having your typical comprehension problem. The 32 hp-hours
generated should be enough for an hour or two of powering - plenty to power the
cat out and back into the inlet. Since the batteries give 2 to 4 hours of
backup, it isn't really necessary to regenerate if you're day sailing out of a
slip.

If you want to do long distance powering or motorsailing, you need to run a
genset. However, a genset run at optimum rpm for recharging will be a lot
cheaper to run than twin diesels.

"JAXAshby" wrote in message
...
let's see. 22 amps at 144 (sic) volts when sailing 18 knots, for about 4 hp
stored per hour times 8 hours gives about 32 hp hours.

yup, that works. you sailed 144 miles and now you're going to motor back
using
1 hp and you are going to do it in just 32 hours (actually about 20 hours
after
taking out ineffiencies).

Being a little sloppy with the units is not that bad - his real blunder is
claiming 72 Watts output. The Condor catamaran claims 22 Amps at 144 Volts,
or
over 3 kW output when regenerating in a good breeze. They generate enough
sailing during the day to power in and out of their inlet.


"Martin Baxter" wrote in message
...
JAXAshby wrote:
oh, you mean horsepower can not be compared to watts?

Gee, the European engine manufacturers do it all the time. somebody
should
tell them you can't do that.

No, I mean this:

"6 amps at 12 volts for 24 hours = 1,728 watts, which = 2.3 hp-hours."

Amps times Volts times hours = Watt-hrs, a unit of energy
Horspower times hours= hp-hrs, a unit of energy
Watts are units of power
Horsepower is a unit of power (who would of thought it?)

Energy and power are two different things, which you well know.

Cheers
Marty