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

[Mary Lou Troy]

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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