[Rhodes22-list] keels- is there a difference?
Roger Pihlaja
cen09402 at centurytel.net
Thu Jul 15 23:32:51 EDT 2004
Todd,
After writing my response to Roger Brown in the UK & studying the diamond
board pictures on the GBI website, I have my own question for Stan & the
list. The design of the diamond board looks to me like it would move the
Center of Resistance (CR) of the keel aft relative to the position of the CR
with the early centerboard. All else being equal, moving the CR aft tends
to cause lee helm. The diamond boards are being installed on the newer
boats that tend to come equipped with the 175% genoa and the IMF mainsail.
The IMF mainsail has about 10 square feet less area than the standard
mainsail. It is my understanding that the missing sail area was all taken
from the roach at the back of the IMF mainsail. Big headsails and smaller
mainsails with less roach both tend to move the Center of Effort (CE) of the
sail plan forward. Again, all else being equal, moving the CE forward tends
to cause lee helm. So, the newest Rhodes 22's seem to have 3 features that
should each cause lee helm.
So my question for Stan & the list is: Do the newer boats with the diamond
board, 175% genoas, & IMF mainsails have a lot of lee helm? If not, was
some other change like moving the mast aft or the shoal draft keel forward
also made at the same time as the diamond board was adopted?
Roger Pihlaja
S/V Dynamic Equilibrium
----- Original Message -----
From: "Todd Tavares" <sprocket80 at mail.com>
To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
Sent: Thursday, July 15, 2004 3:06 PM
Subject: Re: [Rhodes22-list] Bob Skinner -keels- is there a difference?
>
> I monitor other lists as well as boat lists. One list for is
> elevator people to exchange technical information, etc. Very often we
> get questions posted by engineering students that are given
> assignments to build theoretical elevators in a building 5280 ft tall
> and need to know beam loads and building codes. Or to explain relay
> logic for elevator operation or breakdown of the microprocessor
> algorythms for traffic management. Most of these questions are too
> complex to explain in an e-mail. Some are impossible.
>
> What Rhodes 22 owner knows the information that Mr Brown is asking
> for? or even cares? We would like to know which board points better
> or goes faster.
>
> Maybe Mr. Brown is trying to manufacture Rhodes 22 knock-offs in
> Great Britian and doesn't have a marine architect or engineer running
> his CAD. I am sure that Stan did not just pull these dimensions and
> specs out of his rear-end, but spent some time and money researching.
> Lordy Lordy remember the stink I caused over getting a copy of an
> owners manual posted? Mr Brown is asking for very precise
> information, so I am confident that he is intelligent enough to have
> figured out sooner how to unsubscribe himself....but as I only know
> too well...for a would-be blogger, it is like the moth to the flame. :
> )
>
> The least we could do for him is to plug his name into a complaint
> generator and wait for him to look up all of the "polysyllabic
> neologisms" right Michael? :^{D lmao
>
> Todd
>
>
> ----- Original Message -----
> From: "ed kroposki"
> Date: Thu, 15 Jul 2004 11:25:14 -0400
> To: "'The Rhodes 22 mail list'"
> Subject: [Rhodes22-list] Bob Skinner -keels- is there a difference?
> >
> > Bob,
> > Several of us replied to him off list. His replies were .... as MJM
> > mentioned. I doubt that any of us know the cord and centers that he
> wanted,
> > not that he would have understood them. We were just curious as to
> why he
> > wanted such technical information. If you have the information that
> he
> > wanted in the first place, send it to him and see what happens.
> > Now that he brought up the subject, I would be interested in tank
> > test results of the two systems. If you recall earlier this year we
> has a
> > discussion on the pointing ability of the R 22. Is there a
> difference
> > between the two keels?
> > In magazines and other on-line discussions, there recently has been
> > discussion of putting canting keels on very small boats. Do you
> supposes
> > that Stan will put one on a Rhodes 22? In time for the October Boat
> Show?
> >
> > Ed K
> >
> >
> >
> > -----Original Message-----
> > From: rhodes22-list-bounces at rhodes22.org
> > [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of Robert
> Skinner
> > Sent: Thursday, July 15, 2004 10:44 AM
> > To: Rhodes 22 mail list
> > Subject: [Rhodes22-list] Browned off - Why not?
> >
> > Thought "Roger Brown" wanted out on the 12th.
> > Now he's posting a nasty on the 14th.
> > Why not just give him what he asked for in the
> > first place?
> >
> > BTW - I can't find the 7/14 Brown message that MJM
> > includes in his (on target) comments about manners.
> > Was it killed before it got thru to the membership,
> > or did I delete it somehow?
> >
> & gt; /Bob Skinner
> >
> > -------- Original Message --------
> > Subject: [Rhodes22-list] Please Unsubscribe me!!!
> > Date: Mon, 12 Jul 2004 03:14:17 +0100 (BST)
> > From: roger brown
> > Reply-To: The Rhodes 22 mail list
> > To: Rhodes22-list at rhodes22.org
> >
> > Could you please unsubscribe me! I am tired of
> > receiving the gossiping of everybody..
> > Roger brown
> >
> > __________________________________________________
> > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> >
> >
> > __________________________________________________
> > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> --
>
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