[Rhodes22-list] Sailing suggestion.

[Peter Thorn]

Ron,

Given that it takes a 50hp motor to plane a McGregor 26x when the water tank
is empty (3,000 # or so), doesn't it seem unlikely that the wind on the rig
alone would plane a Rhodes 22 (also 3,000 # or so)?   Yet I have read
reports of R22 skippers at 7 or 8 knots  (discounting Bill's experiences on
LIS -- I think that has to do with the water there, or something like that
:~).   I have definitely gone fast in my Rhodes 22, but don't think I've
ever planed it. Surfing down a wave occasionally is about the fastest I've
gone, and then only briefly.

Bill,

Last year coming back from St Michaels in light air with the 175 and UPS
wing and wing we ghosted past a few heavy displacement 40 footers.  Maybe
the skippers' ego is directly proportional to the size of the boat, cause
when we caught up they seemed really pissed off, dropped sails and left us
behind motoring.  However in heavy air we could never keep up with bigger
boats like that.

Maybe a new marketing slogan for Stan "The 505 of trailerable cruisers".

PT


----- Original Message ----- 
From: "Ronald Lipton" <rlipton at earthlink.net>
To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
Sent: Thursday, April 20, 2006 11:09 AM
Subject: Re: [Rhodes22-list] Sailing suggestion.


> The hull speed formula has nothing to do with hull shape. It is based on
the
> relation between wavelenght and propogation velocity of water waves.  At
> "hull speed" the boat is moving in the trough of a co-moving wave formed
by
> the boat's motion in the water.  To go faster the boat must climb up the
> crest
> of the wave.  This needs significant energy.  The amount of energy will
> depend
> on the boat displacement, the height of the wave generated, and the shape
of
> the
> hull.  That's a hard thing to calculate.
>
> Ron
> ----- Original Message ----- 
> From: "David Bradley" <dwbrad at gmail.com>
> To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
> Sent: Thursday, April 20, 2006 9:39 AM
> Subject: Re: [Rhodes22-list] Sailing suggestion.
>
>
> 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
>
>
> __________________________________________________
> Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list