James,
Perhaps I mis-spoke, for any one day transit of more than about 25 miles, they also use their diesel. They use their diesel when their previous day's motoring has left their main bank depleted or whenever the weather has reduced their solar collection. The diesel is also used when they need more than 3kts (3.5mph) for more than a few minutes. Their house batteries are charged with the diesel whenever they can't get shore power, they aren't set up to use solar or the drive bank to refresh their house bank.
They have covered a large portion of their journey on electric power, but they have used their diesel for much more than just a few open ocean crossings.
Fair winds,
Eric
Marina del Rey, CA
--- In electricboats@yahoogroups.com, James Sizemore <james@...> wrote:
>
> Your last comment about slow boat was incorrect they do most of there trip on the electric drive, they only used the diesel for a few open ocean crossings.
>
>
>
> On Feb 1, 2011, at 4:58 PM, "Eric" <ewdysar@...> wrote:
>
> > Bill,
> >
> > Keep in mind that a boat hull doesn't care what generates the power, whether it's a gas engine, diesel engine, sails, pedals, paddles , oars or an electric motor. Each boat requires a given amount of power to reach and sustain a given speed. So, how much horsepower does the 40' houseboat use today?
> >
> >
> > Alternatively, check out this blog. http://www.slowboatcruise.com/ The owners have put together a canal boat that can be run slowly on electric, although most real distance is covered with diesel power. This may give you some ideas...
> >
> > Fair winds,
> > Eric
> > Marina del Rey, CA
> >
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