[Rhodes22-list] Sailing suggestion.

[Hank]

Dave,

Mass below the water line doesn't have anything to do with hull speed
although total mass does.  The following links give some decent
explanations.  The first one helps explain why a rhodes 22 can exceed teh
theoritical hull speed.

http://www.antrimdesign.com/articles/hullspeed.html

http://www.sailnet.com/collections/articles/index.cfm?articleid=colgat006

This article is very technical.

http://www.dynagen.co.za/eugene/hulls/

Enjoy!

Hank

On 4/20/06, David Bradley <dwbrad at gmail.com> wrote:
>
> Bob, thanks.  I had thought that the hull speed formula assumed an
> "average"
> hull shape, and that one of the factors is the mass below the water line.
> By heeling a typical keel boat aren't you moving mass above the water
> line?
>
> Dave
>
>
> On 4/19/06, Bob Weber <ruba1811 at hotmail.com> wrote:
> >
> > Dave, Flat bottom = 18 foot of waterline
> > Healed bottom = 19 foot of waterline
> > Who Cares?
> > The limitation of your maximum speed is based on waterline - Longer
> boats
> > can go faster
> > Hull speed = Square root of the wateriine * 1.3 (51/2 kn) flat or
> 5.7heeled
> >
> > If you ever see sailors on the lee side of the boat using their weight
> to
> > heel the boat on light wind days that is the principle they are going
> > from.
> >
> > Bob Weber
> >
> >
> > >From: "David Bradley" <dwbrad at gmail.com>
> > >Reply-To: The Rhodes 22 mail list <rhodes22-list at rhodes22.org>
> > >To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
> > >Subject: Re: [Rhodes22-list] Sailing suggestion.
> > >Date: Tue, 18 Apr 2006 23:34:11 +0100
> > >
> > >Bill, it sure makes sense to me, just in terms of physics.  Flat bottom
> =
> > >less friction.  Buried side = more friction.  Of course, I was a
> > marketing
> > >major so what the hell do I know about physics?
> > >
> > >Dave B.
> > >
> > >
> > >On 4/18/06, Peter Thorn <pthorn at nc.rr.com> wrote:
> > > >
> > > > Nope.  I agree with you Bill.
> > > >
> > > > PT
> > > >
> > > > ----- Original Message -----
> > > > From: "Bill Effros" <bill at effros.com>
> > > > To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
> > > > Sent: Tuesday, April 18, 2006 11:48 AM
> > > > Subject: Re: [Rhodes22-list] Sailing suggestion.
> > > >
> > > >
> > > > > Jay believes me, but he may be the only one.
> > > > >
> > > > > Bill Effros
> > > > >
> > > > > R22RumRunner at aol.com wrote:
> > > > > > Bill,
> > > > > > Nobody on this lists believes you. A R22 does not sail fast
> flat.
> > It
> > > > > > requires about thirty degrees of heel to get the wind in the
> sails
> > >and
> > > > really  get
> > > > > > her moving. I'd like to see you sail flat in a 10 mph wind. It
> can
> > >be
> > > > done,  but
> > > > > > only by the faint of heart.
> > > > > >
> > > > > > Rummy
> > > > > > __________________________________________________
> > > > > > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> > > > > >
> > > > > >
> > > > > __________________________________________________
> > > > > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> > > >
> > > > __________________________________________________
> > > > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> > > >
> > >
> > >
> > >
> > >--
> > >David Bradley
> > >203.253.9973
> > >dwbrad at gmail.com
> > >__________________________________________________
> > >Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> >
> >
> > __________________________________________________
> > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> >
>
>
>
> --
> David Bradley
> 203.253.9973
> dwbrad at gmail.com
> __________________________________________________
> Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
>