[Rhodes22-list] bumped : capsize discussion continued, masthead float?

[Mary Lou Troy]

Hmmmm.... that was of course "waterline beam"

ML

At 06:43 PM 8/24/2012, you wrote:
>One thing to remember about an R22 is that the hull shape makes it
>difficult to just plug a number into a formula. the R22 has a much
>wider beam at the deck (the published beam - 8ft?) than at the
>waterline - about 6ft. I think the waterline depth is what you want
>for most formulas.
>
>Henderson's "Sailing in Windy Weather" and Adlard Coles "Heavy
>Weather Sailing" (as updated) have contributed greatly to my
>understanding of how wind and waves work. I highly recommend them
>both even if you never have any intention of sailing in that stuff.
>
>Mary Lou
>1991 R22 Fretless
>Rock Hall, MD
>
>
>At 03:38 PM 8/24/2012, you wrote:
> >Hi:
> >
> >Richard Henderson in 'Sailing in Windy Weather' gives a Capsize Screening
> >Formula - CSF = Beam <http://en.wikipedia.org/wiki/Beam_%28nautical%29> / (
> >Displacement 
> <http://en.wikipedia.org/wiki/Displacement_%28fluid%29>/64.2)1/3
> >-
> >
> >Values less than 2 are considered to indicate a higher tendency to capsize.
> >It is a rough guide developed after the Fastnet disaster in 1979. I assume
> >beam is ca 8' - if you know displacement you can calculate CSF.
> >
> >
> >
> >Cheers,
> >Shawn
> >
> >On Fri, Aug 24, 2012 at 9:36 AM, Mike C <hmcheung57 at gmail.com> wrote:
> >
> > > The *initial* stability of most all keel/centerboard boats is relatively
> > > low
> > > just because of the shorter moment arm the ballast has relative to a
> > > regular
> > > keel boat or one of the foil/bulb designs.  However the *ultimate*
> > > stability
> > > is substantially higher.  The Rhodes is also "cursed" in terms of initial
> > > stability by its low wetted area compared to many boats its size.  There
> > > are
> > > ways of quantifying initial and ultimate stability, but I haven't seen an
> > > analysis of the Rhodes 22.
> > >
> > >
> > >
> > > -----
> > > Mike Cheung
> > > s/v Muireann
> > > --
> > > View this message in context:
> > >
> > 
> http://rhodes-22.1065344.n5.nabble.com/bumped-capsize-discussion-continued-masthead-float-tp43938p43952.html
> > > Sent from the Rhodes 22 mailing list archive at Nabble.com.
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