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West Wight Potter Mailing List maintainer
dfarrell@ridgecrest.ca.us
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Judith Franklin Blumhorst wrote:
> If the sails are rigged, the drag from the sails probably will prevent the
> boat from completing the second half of the role and she'll stay inverted at
> 180*
Judy:
I don't believe this to be the case in a fair number of blue water cruising
designs of late. I spoke to Brent (the man who owns the HS 38) and when asked
of this, he indicated that the boat would NOT stay inverted; that the rig would
fail and fall partially away. I believe this to be a likely scenario with a
number of current blue water designs.
> In both cases, your friends are correct. But the question focused more
> specifically on the differences between righting a turtled dinghy vs a
> turtled keelboat that's sitting complacently, upside down in the water.
But Judy, how many large blue water keelboat cruisers have you seen floating
keel up? The weight of the keel would be constantly working as a lever to right
the boat, sails rigged or not. Brent suspects that if for some reason his HC
did not come back up right away that it would not stay inverted. I tend to
believe him. My experience has been that the blue water guys who've come in
from Lewes after being jumped by weather/waves usually come in (or are towed in)
dismasted, derigged, etc. That would tend to support what Brent said earlier
about the rig parting ways with the boat..
> Case 3) If a boat is floating upside down with the keel to the sky, it will
> be pretty stable in that position, with the keel's CG positioned precisely
> above the center of bouyance of the hull. With a wide beam, it will be quite
> stable in the inverted position, especially if the sail is hanging below the
> boat like a sea anchor. (Isabelle's racing boat had a fine, pointy bow for
> low resistance and high speed, and a wide flat aft section for planing with
> humungous sails)
But, this is a variable because different hull planforms will breed different
results.
-- "Sea" ya!--Lars S. Mulford, President East Coast Potter Association (ECPA) Come visit us at http://members.tripod.com/~SpeedSailor s/v Always P15 #2125, lateen rig, sailing greater Chesapeake region "Forgive, and live. Life is worth the challenge of living." --LSSM "Love is good; Love hurts; Love sustains; Love remains." --LSSM
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