[Rhodes22-list] For Roger

[Rik Sandberg]

Ed,

I can't lay claim to Roger's engineering talent, I'm a far cry from an
engineer, not a bit shy to admit it. I do know when my boat sails well
though. The way the R22 handles I would have a hard time believing that the
folks who designed her were not VERY competent marine designers/engineers
who carefully considered every design aspect of this design. I don't believe
that one very often gets anything to work as well as this boat does, without
a lot of careful consideration. I would bet that the R26 was no different.
Although my feeling is that any engineering is an educated guess to a
certain extent, until the prototype is built, tried and proven.

Guess I should read that book.

Rik
----- Original Message -----
From: "Kroposki" <kroposki@innova.net>
To: "'The Rhodes 22 mail list'" <rhodes22-list@rhodes22.org>
Sent: Wednesday, October 16, 2002 10:15 AM
Subject: [Rhodes22-list] For Roger


>
> Roger,
>       In the past you have recommended several good books about sailing
> which I have read.  Recently, Kip Hansen recommended to someone "Spray:
> The Ultimate Cruising Boat" by R Bruce Roberts-Goodson.  I have recently
> gotten this book and in reading his chapter on the technical aspects of
> the "Spray" thought that Roger or Rik or Sam would appreciate this
> discussion.  Have your read this book?
>     If not, now that you have parked "Dynamic Equilibrium", you might
> have time to do so.  While the original "Spray" was 28', he has modified
> plans which have resulted in boats from 22' to over 40'.
>     The discussion made me wonder if Stan checked things like 'center of
> buoyancy', 'center of lateral resistance', 'center of effort', etc. and
> their effect on a sailboat when he made that stretch model in his shop.
>      And a now comes the question of the difference between the Standard
> Sail Plan and the IMF.  Where does that put the center of effort?  What
> effect on the curve of stability?  Did Phil Rhodes establish these
> points on the original plans?
>                        Ed K
>
>
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