[C320-list] mast

[Robert E. Sloat]

John-Slight bend can be induced with tightening the D1Fs on the 320.  You
will have to loosed the D1As also.  (Translation: tighten the lower forwards
and loosen the lower afts.)  See Yeager's article in the 320 International
site.

Also check out the Selden mast tuning guide in the link below on their
website which has some good tips on mast tuning.  You may have to drill down
through various of their help manuals to find it.    The manual is called:
'Hints and Advice on rigging and tuning you Selden Mast."

http://www.seldenmast.com/download.cfm?download=7581&webnode_id=2099&filename=595-540-E.pdf

Charleston spars are on my 2002 320, but the generic tuning for masthead,
multi-spreader, in-line, deck-stepped masts like ours is generally the same.


Bob Sloat
Savannah 894


----- Original Message ----- 
From: "John Van Vessem" <jvanvessem at sbcglobal.net>
To: "C320-List" <C320-List at catalina320.com>
Sent: Saturday, May 27, 2006 8:22 AM
Subject: Re: [C320-list] mast


> Steve,
>
>   I never understood how you can move or bend the top of the mast since
the head stay and back stay counter each other.  To bend  the mast you would
have to stretch the head stay.  Although there is a certain amount of
stretch in steel cable, I think what you are really doing is pushing the
mast down.
>
>   John (Sojourn 645)
>
> Steve Magennis <magenns at yahoo.com> wrote:
>   While that's true (the tapered top IS slightly lighter than an
> untapered top), the taper also allows us to SLIGHTLY bend (not rake)
> the top of the mast with a backstay adjuster (if the forward lowers are
> tight) and SLIGHTLY depower the main (the bend sucks a little cloth out
> of the belly of the main).
>
> I don't think either reason is significant.
>
> Steve
> Alchemist #909
>
> --- David Gleason wrote:
>
> > I
> > believe the reason the top of the mast istaperedd is to reduce the
> > weight aloft.
> >
> > Dave Gleason
> > Proud Mary, #150
> > On Mon, 22 May 2006 11:35:48 EDT JBrown5093 at aol.com writes:
> > > Thanks for the information. This list is always helpful. Jim Brown
> > >
> > >
> >
> >
>
>
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> John Van Vessem
> Sojourn 645
> Vallejo Yacht Club