[PUP] 103.00 oil solution

[bill]

Hi Kevin,

"Its your basic A/B relationship (above and below
waterline), If a
 rig is with sail engaged it dampens roll-if not the
mass aloft in
 effect counters (deminishing the effects of) the mass
below."

Disagree.  The moments, pitch and roll, are
established by the distance of mass from the center of
gravity, above or below the wl.  Or to the sides for
that matter.

Picture the skater on ice, in a spin with arms
extended; slow.  Pull in the arms, still spinning,
faster.  Or the rope walker with a balance pole.  The
pole dampens motion.

 "The
 addittional distance from waterline of the above mass
may reach say 65ft, as
 opposed to 6.5ft below waterline for the keel which
multiplys its influence
 (although significantly less weight)."

Agree the distance multiplies the effect of weight. 
If you put a 10# weight at a height of 65' above the
center of gravity, it will have the same roll
dampening as 100# placed 6.5' below the center.

Check out some of the conclusions from the 79 Fastnet
regarding which boats rolled more esily, masted or
dismasted ones.

Best regards,
Bill



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