[C320-list] rigging

[Jeff Church]

Stan,

Thanks for the info. Mine is a bit looser.

I was out sailing yesterday and was headed downwind in light air. I just
happened to remember this conversation so I eased off the backstay adjuster
about 2/3 of the way and sure enough, I picked up a couple of 10ths of a
knot. Eased it off all the way and didn't gain or loose any speed. I think
I'll tighten the forestay a little, next season.

Jeff

----- Original Message ----- 
From: "Stan" <ola7442000 at gmail.com>
To: "C320-List" <c320-list at catalina320.com>
Sent: Monday, September 04, 2006 4:22 PM
Subject: Re: [C320-list] rigging


> Hi Jeff,
>
> If I shake the forestay I get about 10" of movement.
>
> Stan
> "Our Little Amusement" #744
>
>
> On 9/1/06, Jeff Church <jjemail at comcast.net> wrote:
>>
>> Stan,
>>
>> I agree. I just don't think THAT much sag is necessary. Do you have as
>> much
>> sag as Yeager recommends?
>>
>> Jeff
>> ----- Original Message -----
>> From: "Stan" <ola7442000 at gmail.com>
>> To: "C320-List" <c320-list at catalina320.com>
>> Sent: Friday, September 01, 2006 9:41 AM
>> Subject: Re: [C320-list] rigging
>>
>>
>> >I have to respond to the sagging forestay.  I have experimented and yes
>> in
>> > light winds (2-6 Kts.)  I can sail somewhat faster and definetly higher
>> > with
>> > a sagging forestay.  I know this doesn't make a lot of difference
>> > unless
>> > your racing.  I've think/feel there is a noticable diffeence going
>> > downwind
>> > but the wind and seas vary too much to quantify actual improvements.
>> >
>> > Stan
>> > "Our Little Amusement" #744
>> >
>> >
>> > On 9/1/06, Jeff Church <jjemail at comcast.net> wrote:
>> >>
>> >> Bruce,
>> >>
>> >> > >The manual does not discuss pre-bend, does everyone tune for
>> straigt?
>> >> Our masts are very stiff and don't allow for much pre-bend, but if you
>> >> adjust the forward lower shrouds tighter than the aft lowers you can
>> >> encourage a little mast bend when you haul in the backstay adjuster.
>> >>
>> >> > >It also says that you can adjust for 0 to 1 percent rake....
>> >> I think the manual calls for 1 degree of rake. I've tried 1 degree of
>> >> rake
>> >> and had a bit too much weather helm, so I reduced the rake to just
>> about
>> >> zero. You can get a rough idea how much rake you have if you hang
>> >> something
>> >> heavy from the main halyard and use it as a plumb bob. You'll have 1
>> >> degree
>> >> of rake if there is an 8 inch space between the back of the mast and
>> the
>> >> halyard, at the base of the mast.
>> >>
>> >> >> The backstay seems very tight and very dificult to get installed.
>> >> I added a 2" eye jaw toggle to the backstay.
>> >> http://schaeferhardware.com//SearchResult.aspx?CategoryID=223
>> >>
>> >> The C320 manual gives you the basic instructions for centering the
>> mast,
>> >> and
>> >> you can get some good info from Mark Yeager's Rig Tune and Sail
>> Selection
>> >> article on the C320 site.
>> >> http://www.catalina320.com/article.php/20040828173431380
>> >> I disagree with one of Yeager's points related to rig tuning. He
>> suggests
>> >> adding a toggle to lengthen the forestay instead of the backstay. He
>> says
>> >> this will give you more mast rake, but the length of the forward
>> >> lowers
>> >> limits the maximum amount of rake to about 1 degree. At that point the
>> >> forestay is no where near the end of its adjustment, so why add a
>> toggle?
>> >>
>> >> Yeager has another curious suggestion. He says that you should be able
>> to
>> >> swing the forestay in a 1 foot diameter circle. I've got my rig
>> adjusted
>> >> for
>> >> the amount of forestay sag that he suggests, and I haven't found a
>> single
>> >> point of sail or wind condition where easing the backstay adjuster all
>> >> the
>> >> way off and letting the forestay sag that much yields better boat
>> speed.
>> >> My
>> >> sailmaker agrees. He checked the rig when he delivered new sails and
>> said
>> >> that the forestay is too loose. Also, unless you have a very long
>> >> backstay
>> >> adjuster (mine is limited by the height of the bimini) you'll have
>> >> difficulty getting enough forestay tension. You might try for half the
>> >> sag
>> >> that Yeager calls for.
>> >>
>> >> I hope that helps.
>> >>
>> >> JeffC
>> >>
>> >>
>> >> ----- Original Message -----
>> >> From: <bruceheyman at cox.net>
>> >> To: "C320-List" <c320-list at catalina320.com>
>> >> Sent: Thursday, August 31, 2006 6:02 PM
>> >> Subject: [C320-list] rigging
>> >>
>> >>
>> >> > I'll be tuning the rig tomorrow for the first time.
>> >> >
>> >> > The manual does not discuss pre-bend, does everyone tune for
>> >> > straigt?
>> >> >
>> >> > It also says that you can adjust for 0 to 1 percent rake.  What does
>> >> > everyone recommend.  We want a little weather helm.  Also I assume
>> that
>> >> 1
>> >> > percent means the head of the mast will be 1 percent of the spars
>> >> > length
>> >> > back from vertical.
>> >> >
>> >> > The backstay seems very tight and very dificult to get installed.
>> >> > Since
>> >> > it is adjustable I expected that it would be floppy when
>> released.  Any
>> >> > advice?
>> >> >
>> >> > Any other tips or lesons learned would be much appretiated.
>> >> >
>> >> > Bruce
>> >> > Somerset 671 So Cal
>> >> > Sent via BlackBerry from Cingular Wireless
>>
>>
>>
>
>
> -- 
> Stan
> C320 "Our Little Amusement" #744
> __/)__/)__/)__/)__