[Rhodes22-list] Rudder angle, tacking, and racing

[Richard Smith]

It is entirely possible to lash the tiller and trim the boat to sail at a
certain angle to the wind for extended periods.

It works best with deep draft full keel boats but with patience  I have had
some luck in fin keeled boats.

Many classic books on ocean cruising describe the correct way to adjust the
vessel's rig for such an endeavor.

Richard Smith

----- Original Message ----- 
From: "Robert Skinner" <robert at squirrelhaven.com>
To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
Sent: Tuesday, November 20, 2007 11:50 AM
Subject: Re: [Rhodes22-list] Rudder angle, tacking, and racing


> I agree with keeping the boat in trim as an efficient way of
> doing things, as I noted in the original message.  However,
> based on experience with rudder angle up to this point in
> using it to scull, etc., I think the subject needs more
> experimental input than theoretical discussion.
>
> I would also note that it is difficult if not impossible to
> keep a boat in perfect trim under varying conditions.
>
> I await the results of real world testing.
>
> /Robert
>
> Richard Smith wrote:
> >
> > >From a hydrodynamic standpoint all that raking the rudder blade aft
would
> > accomplish is to increase the apparent chord of the blade (assuming that
the
> > water flow is more or less parallel with the water surface. ) This would
> > increase the Reynolds # (good) but lower the camber to chord ratio (not
good
> > for slow speeds).
> >
> > In my opinion it is much more important to trim your boat for a natural
> > helm.  This will avoid the drag caused by continually correcting weather
or
> > lee helm.
> >
> > Richard Smith
> >
> > ----- Original Message -----
> > From: "Robert Skinner" <robert at squirrelhaven.com>
> > To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
> > Sent: Wednesday, November 14, 2007 8:47 PM
> > Subject: [Rhodes22-list] Rudder angle, tacking, and racing
> >
> > > When you angle the rudder aft, it has the effect
> > > of changing the foil shape to one more efficient
> > > for slower speeds.  This reduces the stall speed
> > > of the rudder just as a flap does on an airplane
> > > wing.
> > >
> > > So, to check this theory while racing, lift the
> > > rudder when tacking, but lower it when running
> > > free or in strong wind.
> > >
> > > When on a beam reach, having the rudder aligned
> > > with the axis of the gudgeons will reduce tiller
> > > effort if the sails are not balanced, or if you
> > > get a great gust with a weather helm.
> > >
> > > Betcha you will go faster.  Let me know - I'm
> > > out of the water 'til spring.
> > >
> > > /Robert
> > > --------------------------------------------------
> > > Leland wrote:
> > > >
> > > > Jb,
> > > >
> > > > First of all, great pictures.  Your boat is beautiful and your
pictures
> > of
> > > > the regatta reminded me that Annapolis isn't the only place to see a
> > bunch
> > > > of sailboats.  Catch that fish off of your Rhodes?
> > > >
> > > > I never thought about lifting the rudder to reduce drag on a tack.
> > Although
> > > > it makes sense, I probably won't do it just out of pure laziness.
Is
> > this a
> > > > common technique with the racing crowd?
> > > >
> > > > Lee
> > > > 1986 Rhodes22  At Ease
> > > > Crab Alley (Kent Island, MD)
> > > >
> > > > Just bent wrote:
> > > > >
> > > > > I did that on purpose so when I throw the tiller over to tack, it
> > doesn't
> > > > > put on the brakes as much, but still turns.
> > > > > Jb
> > > > >
> > > > >
> > > > > Rob Lowe wrote:
> > > > >>
> > > > >> Just bent,
> > > > >> Just finished looking at your photos (thanks).  Noticed the
position
> > of
> > > > >> your
> > > > >> rudder.  It appears not to be down all the way.   Is there some
sort
> > or a
> > > > >> "down haul" that pulls the rudder down into a vertical position?
Try
> > it
> > > > >> and
> > > > >> see if your maneuvering improves. - rob
> > > > >>
> > > > >> Rob Lowe
> > > > >> S/V Getaway
> > > > >>
> > > > >> ----- Original Message -----
> > > > >> From: "Just bent" <j.bulfer at jbtek.com>
> > > > >> To: <rhodes22-list at rhodes22.org>
> > > > >> Sent: Saturday, November 10, 2007 11:39 PM
> > > > >> Subject: [Rhodes22-list] new boat position
> > > > >>
> > > > >>
> > > > >>>
> > > > >>> I moved my boat about 12" forward on the trailer. It towed much
> > better.
> > > > >> I'll
> > > > >>> check the weight tomorrow.
> > > > >>> Lots of sailors out today. New pics on the ftp site.
> > > > >>>
> > > > >>> ftp://ftp.jbtek.com/pub/
> > > > >>>
> > > > >>> Jbulfer
> > > > >>> "Just bent"
> > > > >>> http://www.nabble.com/file/p13688442/DSC00958.jpeg
> > > > >>> http://www.nabble.com/file/p13688442/DSC00928.jpeg
> > > > >>> --
> > > > >>> View this message in context:
> > > > >> http://www.nabble.com/new-boat-position-tf4784775.html#a13688442
> > > > >>> Sent from the Rhodes 22 mailing list archive at Nabble.com.
> > > > >>>
> > > > >>> __________________________________________________
> > > > >>> Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> > > > >>
> > > > >>
> > > > >> __________________________________________________
> > > > >> Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> > > > >>
> > > > >>
> > > > >
> > > > >
> > > >
> > > > --
> > > > View this message in context:
> > http://www.nabble.com/new-boat-position-tf4784775.html#a13746323
> > > > Sent from the Rhodes 22 mailing list archive at Nabble.com.
> > > >
> > > > __________________________________________________
> > > > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> > >
> > > --
> > > Robert Skinner  "Squirrel Haven"
> > > Gorham, Maine         04038-1331
> > > s/v "Little Dipper" & "Edith P."
> > > __________________________________________________
> > > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> >
> > __________________________________________________
> > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
>
> -- 
> Robert Skinner  "Squirrel Haven"
> Gorham, Maine         04038-1331
> s/v "Little Dipper" & "Edith P."
> __________________________________________________
> Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list