Start with the backstay adjuster fully off. Hang a fairly large weight from
your main halyard and see where the halyard touches the boom. Measure aft from
the goose neck. Should be 6-12 inches depending on the model boat. See my
earlier post subject "30 MKI weather helm - mast rake" for more technical info
on measuring and setting mast rake.
Do NOT crank your backstay adjuster down 7 inches. A backstay adjuster is
supposed to adjust headstay sag, not rake. Mast rake is a static setting which
is part of your "dock" tune. That is, it is done when you set up your rig
tensions, etc. before you go out on the water.
Increasing backstay tension will also add some bend to most rigs. This is not
to be confused with pre-bend which is also part of your "dock" tune.
Inducing pre-bend and increasing it with bend may actually decrease weather
helm depending on how your main sail is cut. If it is cut fairly flat, that
is, without a lot of draft, then bend will flatten it more. Flatter sails are
less prone to create weather helm. However, if your main is cut full or is
"bagged out", then bend and pre-bend may do little to flatten it.
Dennis C.
Touche' 35-1 #83
Mandeville, LA
>________________________________
> From: Curtis <cpt.b...@gmail.com>
>To: cnc-list@cnc-list.com
>Sent: Wednesday, November 27, 2013 9:55 PM
>Subject: Re: Stus-List 30 MKI weather helm
>
>
>
>How can you tell how many inches of rake you have in the mast? I have a back
>adjuster that is not hooked up to any thing? Should I pull it down 7 inches?
>
>
>
>
>
>On Wed, Nov 27, 2013 at 3:45 PM, Don Newman <donrnew...@gmail.com> wrote:
>
>Sail condition and trim have a significant impact on weather helm.
>>
>>
>>
>>
>>
>>On Wed, Nov 27, 2013 at 3:06 PM, Frederick G Street <f...@postaudio.net>
>>wrote:
>>
>>Speaking from a practical. rather than theoretical standpoint, my experience
>>with my previous boat, a 1981 30mkI suggests to me that having the top of the
>>mast about 8-9” AFT of the gooseneck resulted in a well-balanced boat.
>>>
>>>
>>>I guess your mileage may vary...
>>>
>>>
>>>Fred Street -- Minneapolis
>>>S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI :^(
>>>
>>>On Nov 27, 2013, at 1:56 PM, Joel Aronson <joel.aron...@gmail.com> wrote:
>>>
>>>Aaron,
>>>>
>>>>
>>>>I'm with you.
>>>>
>>>>
>>>>Joel
>>>>
>>>>On Wednesday, November 27, 2013, Aaron Rouhi wrote:
>>>>
>>>>Hmmm.... I always thought with more mast rake the Center Of Effort moves
>>>>further aft which means wind pushing the boat from behind the CLR and as a
>>>>result weather helm increases so using that logic I raked it forward to
>>>>move COE forward. Am I wrong?
>>>
>>>
>>>_______________________________________________
>>>This List is provided by the C&C Photo Album
>>>http://www.cncphotoalbum.com
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>>>
>>>
>>
>>
>>--
>>
>>Don Newman
>>C&C 44
>>
>>_______________________________________________
>>This List is provided by the C&C Photo Album
>>http://www.cncphotoalbum.com
>>CnC-List@cnc-list.com
>>
>>
>
>
>
>--
>“Sailors, with their built in sense of order, service and discipline, should
>really be running the world.” - Nicholas Monsarrat
>
>
>
>
>_______________________________________________
>This List is provided by the C&C Photo Album
>http://www.cncphotoalbum.com
>CnC-List@cnc-list.com
>
>
>
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