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RE: Baggy Main




Paul,
 
In the owner's manual it talks about the main having a "shelf foot" under the section labeled "SAN JUAN 23 INVENTORY".  In order to have an airfoil shape (cross section) down towards the bottom of the sail, it has to have a certain bagginess to it.  It is the same way on an airplane.  The root of the wing is thicker and longer than the tip of the wing.
 
That's my story, and I'm sticking to it!  RR
 
Peace,
 
Eric
-----Original Message-----
From: Paul Hensler [mailto:p_hensler@xxxxxxx]
Sent: Saturday, August 03, 2002 9:09 AM
To: sanjuan23@xxxxxxxxxxxxxxxxxxxxx
Subject: Baggy Main

Bob -
 
I have the foot pulled tight and it still has the sag, almost like a
very elongated pouch.  The boat moves OK in light air with the
150 jib, but the baggy main has always been a curiosity.
 
 
 
Thanks,
Paul
****************  
 
----- Original Message -----
From: Bob Schimmel
Sent: Friday, August 02, 2002 8:28 PM
To: sanjuan23@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: Mainsail Slider slug placement
 
Paul Hensler wrote:

> Patrick - I switched from the bolt rope after a year with my used
> SJ23.  I took thesail to a sailmaker and he knew just what to use, but
> I'm not sure whetherthe slides are plastic or nylon.  With the slides,
> it was much easier than meclinging to the mast and messing around with
> the old bolt rope, and therewas not much of a loss in trim with the
> luff not being quite as tight as itused to be. Since we're on the
> subject - I've always wondered why the foot of themain is so baggy.
> The sail isn't stretched, it seems that it was made thatway.  Could if
> be because it's a "West Coast" boat?  My sailing buddyknows the ins
> and outs of small sail boats, but he can figure it
> outeither.     Regards,Paul Hensler#426**************
>
>      ----- Original Message -----
>      From: Chuck Vande Wetering
>      Sent: Friday, August 02, 2002 11:30 AM
>      To: SanJuan23list
>      Subject: Mainsail Slider slug placement
>
>
>
>      ----- Original Message -----
>      From: "P. Wm. Burke" <burkesfarm@xxxxxxxxxxx>
>      To: <wwp62@xxxxxxxxxxxxxxx>
>
>
>      > Dear Chuck,
>      >
>      >    I purchased my 1978 sail #149 SJ 23 in March this year
>      and have enjoyed
>      > her to date. I've been busy upgrading and restoring her
>      but have a few
>      > questions on my next project. I installed lazy jacks and
>      now need to
>      improve
>      > the mainsail operation. I've been inserting the luff rope
>      in the slot of
>      the
>      > spar and now want a better system. I wanted to install a
>      mainsail slider
>      > system but found out because of the teardrop cross section
>      shape of the
>      > mast, most systems cannot be applied . Do you have any
>      suggestions? Slugs
>      > seem to be the option. What are the differences between
>      plastic and nylon
>      > slugs. What size slug do I need. How many slugs and what
>      are the positions
>      > of placement on the sail. Do I need to take the sail to a
>      loft for
>      > modification. Any other comments or options are gladly
>      appreciated.
>      >
>      > Yours truly,
>      > Patrick
>      >
>      >
>      >
>      >
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Paul:
The reason why the foot of the mainsail is so baggy is to create "lift"
to move the boat in very light air.  When the wind is blowing hard, you
pull out the clew to flatten the foot.  These are the two extremes.  You
adjust the foot tension in proportion to the wind strength.

Kind Regards

Bob Schimmel
(Always stay curious)



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