Hi Justin,
The specs that you posted were good, but your Formosa 41 has a displacement of 28,000 lbs, the amount of ballast isn't really relevent.
The rule of thumb used for many conversions is 1kW of drive for each ton of displacement. This means that you should be looking for a drive system that is rated for at least 14kW. You're lucky that there are two sisterships that are converted or being converted. You should be able to get good information to set your expectations for your electric performance and the approximate cost of the conversion.
If either of the other two electric Formosa 41s can post their performance numbers (watts to knots), we'll all understand the conversion of larger boats a little better.
Fair winds,
Eric
Marina del Rey, CA
PS. This conversion will probably be more expensive than you think, you shouldn't go into this thinking that it will be significantly cheaper than a diesel installation. That said, there are plenty of reasons to go electric, you just have to see if the compromises of electric drives don't conflict with the way that you use your boat.
--- In electricboats@yahoogroups.com, justin johnson <justrayj@...> wrote:
>
> I am new to your site and coming to you from Honolulu Hawaii. I am the
> owner of a Formosa CT41, a 45' sailing ketch. The original 50hp diesel
> motor has failed and it is time to choose a replacement. I am really drawn
> to the quieter operation of an electric drive. In addition many of the
> outer islands in the chain do not allow the use of fossil fuels.
>
> I am very confident installing a system myself. However I am new to this
> format and still learning. Any suggenstion or comments are very welcome.
>
> FYI 39" at the water line 45' overall, 12' beam 9,000lb full keel, It is
> necessary to navigate about a mile of a narrow channel to get to open water.
>
> Justin
>
No comments:
Post a Comment