Twin rudders?

Discuss the IOM class rules and interpretations

Moderators: Pedro Egea, jeffbyerley

Post Reply
Jimmy
Posts: 3
Joined: 15 Nov 2005, 16:15
Location: SWE 17

Twin rudders?

Post by Jimmy » 17 Nov 2005, 18:49

Is it allowed to have two rudders like on the IMOCA 60 and VO 70?
And what about wings on the rudder?

//JIMMY

Steve Landeau
Posts: 256
Joined: 26 Nov 2003, 07:25
Sail number: USA 12
Design: Which One
Location: USA 12
United States of America

Post by Steve Landeau » 17 Nov 2005, 21:56

wings-yes, two rudders- no.
Steve Landeau
AMYA 10859
IOM USA 112
Finn USA 112
Cal 25 #548

Arvin S.

Wings on Rudder

Post by Arvin S. » 30 Jan 2006, 18:05

Hi Steve,

Just as a clarification (not sure if I understood correctly). It is clear the twin rudders are not class legal but you mentioned "Wings" are?

Does this specifically mean a hydrofoil type of wing? Or at least a wing at the end of the rudder that will help lift the transom of the boat? or for some other reason lower the transom by using a "wing"?

How about wings on the keel, or keel bulbs just like the Americas cup keels nowadays?

I was under the impression that wings on any of the appendages were not allowed. :)

TTFN
Arvin

Steve Landeau
Posts: 256
Joined: 26 Nov 2003, 07:25
Sail number: USA 12
Design: Which One
Location: USA 12
United States of America

Re: Wings on Rudder

Post by Steve Landeau » 30 Jan 2006, 21:04

Arvin S. wrote:Hi Steve,

Just as a clarification (not sure if I understood correctly). It is clear the twin rudders are not class legal but you mentioned "Wings" are?

Does this specifically mean a hydrofoil type of wing? Or at least a wing at the end of the rudder that will help lift the transom of the boat? or for some other reason lower the transom by using a "wing"?

How about wings on the keel, or keel bulbs just like the Americas cup keels nowadays?

I was under the impression that wings on any of the appendages were not allowed. :)

TTFN
Arvin
So long as it cannot move while under way, wings are allowed.
Here is the rule in question (Sections E3 and E4):
http://www.radiosailing.org/pdf/IOM%20CR%202003.pdf
Steve Landeau
AMYA 10859
IOM USA 112
Finn USA 112
Cal 25 #548

Lester
Posts: 628
Joined: 14 Oct 2004, 22:29
Location: GBR 105
Contact:

Re: Wings on Rudder

Post by Lester » 30 Jan 2006, 22:34

Steve Landeau wrote:Here is the rule in question (Sections E3 and E4)
Might be worth mentioning that, since the terms 'keel' and 'rudder' are in bold in the class rules, then we need to also look at the Equipment Rules of Sailing (the 2004 version, not the 2005-2008 version!) before we can be certain (it seems clear to me that the ERS do not contradict anything Steve has said):

http://www.sailing.org/ers2001/ers.pdf
Lester Gilbert
http://www.onemetre.net/

arvin555
Posts: 1
Joined: 01 Feb 2006, 15:41
Location: PHI01
Contact:

Post by arvin555 » 03 Feb 2006, 06:09

Steve and Lester,

Thanks for clarifying. For some reason I have always thought that wings on rudders and keels were prohibited. :)

Hmmm, will surely open up some experimentation possibilities.

TTFN
Arvin

PS. I had to change my membership as i did something with my old mebership and I couldn't log in anymore.
Arvin S
PHI01

Post Reply