[Alberg30] Positive Stability Range

[John Birch]

Sweet - thank you, nice tool to have - suggest comparison to A-30, A-37.
Yup, good boats indeed - now shall we compare them to KZ 81 - what's the
snap crackle pop value? ; )

Cheers,

John

----- Original Message -----
From: "Bruce Dart" <brucedart at yahoo.com>
To: "Alberg 30 public list" <public-list at alberg30.org>
Sent: Wednesday, March 05, 2003 5:25 PM
Subject: Re: [Alberg30] Positive Stability Range


> That screening formula number (and a number of others)
> is available at the following site
> http://www.image-ination.com/sailcalc.html
> where you can look up and compare a large number of
> sailboats.
>
> Bruce Dart
> s/v Wings O' Morning
> Cape Dory 25 Hull #755
> (yes, I know it's not an Alberg, but...)
> --- George Dinwiddie <gdinwiddie at alberg30.org> wrote:
> > John Birch wrote:
> > > "The Desirable and Undesirable Characteristics of
> > Offshore Yachts" has a
> > > screening formula. That formula was applied to
> > about 50 different yachts by
> > > Practical Sailor about 12 or more years ago. The
> > A-30 came in second being
> > > marginally beaten out by the Ludders 44. The A-37
> > came in fourth. The
> > > threshold was to have a screening number as far
> > below 2 as possible. The
> > > A-30 was 1.6, the A-37 1.62.
> >
> > That's interesting.  I didn't know about that list.
> >
> > > That measure, the roll screening formula, was to
> > determine the propensity of
> > > a vessel to come back up (right side up) in the
> > event of a knockdown or
> > > roll.
> >
> > As I understand it, the formula produces an estimate
> > of the number of
> > seconds a boat inverted to 180 degrees will take to
> > right itself given
> > wave action.
> >
> >   - George
> >
> > --
> >
> >
> ----------------------------------------------------------------------
> >    Hope your road is a long one.
> >    George Dinwiddie
> >    May there be many summer mornings when,
> > gdinwiddie at alberg30.org
> >    with what pleasure, what joy,
> > http://www.Alberg30.org
> >    you enter harbors you're seeing for the first
> > time;
> >                                             from
> > 'Ithaka' by C.P. Cavafy
> >
> >
> ----------------------------------------------------------------------
> >
> >
> >
> >
>
+===========================================================================
===========+
> >  |     New England Ropes on Sale;  EXAMPLE: 1/2 inch
> > Sta-Set only 51 cents per foot     |
> >  |
> >
>
http://www.myaffiliateprogram.com/u/sailnet/t.asp?id=1066&p=store/item.cfm?p
id=25719
> > |
> >
> >
>
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+===========================================================================
===========+
>  |     New England Ropes on Sale;  EXAMPLE: 1/2 inch Sta-Set only 51 cents
per foot     |
>  |
http://www.myaffiliateprogram.com/u/sailnet/t.asp?id=1066&p=store/item.cfm?p
id=25719 |
>
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 +======================================================================================+
 |     New England Ropes on Sale;  EXAMPLE: 1/2 inch Sta-Set only 51 cents per foot     |
 | http://www.myaffiliateprogram.com/u/sailnet/t.asp?id=1066&p=store/item.cfm?pid=25719 |
 +======================================================================================+

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