On Tue, 01 Feb 2005 18:51:58 -0800, rascalfair wrote:

Does anyone know about where from bow to stern the center of rotation
is on a full keel power cruiser or sailboat?

I've heard it's as far forward as 1/3 from the bow....my boat behaves
differently. I'm interested in what the architects think, particularly.
Thanks in advance.....

I'm not an architect. But for foils which are not stalled, the center of
pressure is usually about 25% of the way back from the leading edge of the
foil.

When you are barely moving, the foil is probably stalled, and the center
of pressure is then at about the 50% mark.

If the keel leading edge is swept back (I'm sure it is) then use the
middle (vertically speaking) point as your reference for the leading edge,
I guess.

I don't know what a full-keel power cruiser is. If it has a keel in the
water, the above should hold more or less true.

HTH!

--Mac