Red,
If you get the weight and center of gravity for your conversion at the same place as the boat as-designed it will have the same stability.
Removing the mast will greatly increase roll stability, even though it may only weigh 50# or so it's cg is so high that it has a significant effect.
I would bet that if battery weight = removed ballast weight and they are mounted as low as possible and roughly in the same fore-aft location as the ballast and you remove the rig you will have a more stable boat.
It's your boat, though.
Denny
----- Original Message -----
Sent: Thursday, April 08, 2010 12:44 AM
Subject: [Electric Boats] Re: Pure or mostly solar powered boat?
Denny,
Following sugestions from this group, I did a little online shopping today. Powerboat hulls just don't seem like good candidates to me. Even small trawlers have engines in the 100HP range. I switched back to sailboats and found a couple of centerboard boats at 28'. I am still a little concerned about the stability. I'll have to give it some thought.
-Red
--- In electricboats@yahoogroups.com, "dennis wolfe" <dwolfe@...> wrote:
>
>
> On the notion of revamping an old fg sailboat hull for electric power: I think is is a fine idea. Is it the most efficient shape for the new low-power boat mission? No. Is is cost effective? Absolutely.
>
> A purpose designed, custom built 30' power boat would be at least $150,000 - probably more. An old 28 - 30' sailboat with clapped out sails and a non-working engine could be found for a few thousand dollars. I have a friend who just bought a nice sailable 32'er at a bank reposession auction for $1000.
>
> A boat having a centerboard with internal ballast would be the best as its is designed to have the ballast inside the hull, not hanging down 3' below the boat. It will have much less draft than the keel boat, too.
>
> Load it up with 1000 lbs of batteries, fix a Torqeedo 4.0 in a well and steer with the rudder. You would have a very nice E boat with a new high-tech propulsion system for less than $15k.
>
> Just my $0.02.
>
> Denny
>
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