[MHml] Cat Rudders Toed In?

[thomas deane]

i haven't heard anything on rudders toed in but have heard outriggers from 
old polynession toe in. there is a thing about tillers called ackerman setup 
that turns rudders at differen't angles as you turn. thomas deane
----- Original Message ----- 
From: "kenny mclain" <kennyjmclain at yahoo.com>
To: "Informed discussion of multihull issues" <multihulls at steamradio.com>
Sent: Friday, September 01, 2006 9:41 AM
Subject: Re: [MHml] Cat Rudders Toed In?


> Did you actually check the alignment of the rudders
> with the hulls when both tillers are proportionally
> offfset to the inside?
>
> My conser 40 Catamaran has the tillers offset inward
> on both sides when the rudders are parallel. the
> rudder post holes also are slightly offset when the
> rudders are parallel to the hulls.The offset tiller
> allows more room for  a better body/hand relationship
> to the tiller when in the cockpit. Good Luck.
>
> Kenny McLain
> MISTRAL Conser C-40
>
>
> --- Rita Kepner and John Matthiesen <lynx at olympus.net>
> wrote:
>
>> List Friends,
>>     Our new to us 35' Cat (designer unknown) appears
>> to have both rudders toed in about half a degree
>> from parallel.  Is this a normal thing with cats or
>> a builder's mistake?  My experience is with
>> trimarans and I would think they should be parallel
>> with the centerline of the hulls.  The rudders are a
>> tapered NACA 0012 foil with the shaft at 25% of the
>> chord.  I'm reattaching the tiller crossbar at the
>> ends of the tillers, and it is 1 1/2" shorter
>> (center of tiller hole to hole) than the rudder
>> shafts are (14' center to center)  The tillers are
>> 58" long.
>> Thanks for any advise!,  John Matthiesen, Sugaree
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