[C320-list] FW: Re: Single Line Reefing

Thu Jun 22 19:00:43 PDT 2006

To all, Thanks for this info.
We made the C380 change only using 1 inch Stainless Steel triangle loops of
3/16 wire, instead of circular loops.

Our Material list was:

2 each Harken 40 mm Carbo Air Blocks w/shackle, Harken 2636, WM 200126 @
$21.99 each
2 each-1 inch triangle loops of 3/16 wire,Seafit Hardware C-0139-T525-W, WM
534248 @ $10.99 ea

As for installation, first look at the port side reefing line where it
enters the boom at the mast.
It usually comes up from the block at the base of the mast and should go
over a sheave at the boom to the end of the boom.  Then you have to make a
choice of either re-reaving the reefing line so it comes under the sheave to
go up to the block on the luff, OR putting another block at the bases of the
mast so it will go down, as the sheave wants it to go, and then come up to
the luff block then down again to another block you will have to add at the
base of the mast.

On our boat the line was under the sheave and so we just lead it up to the
luff block and back down to the mast base block and back to the cockpit.

The rest was just like the C380 article.

The real advantage of the 1 inch triangle loop was the way it fits so nicely
through each reef cringle to the air block shackle.

Irv Grunes
Isle of Wight #851

-----Original Message-----
From: C320-List-bounces at catalina320.com
[mailto:C320-List-bounces at catalina320.com]On Behalf Of Karl Mielenhausen
_/)
Sent: Thursday, June 08, 2006 9:21 AM
To: C320-List at catalina320.com
Subject: [C320-list] FW: Re: Single Line Reefing

Better yet, this article (and many other fine technical articles) are on the
C380IA website....

http://www.catalina380.org/article_display.asp?ID=114

A nicely organized resource for us also!!!!

Karl Mielenhausen

2000 C320 Hull#690 "Silver Lining"

New Bern, NC

http://members.cox.net/mielen/

From: Walter burnett [mailto: selkie2003 at yahoo.com]

To: C320-List at catalina320.com

Date: Wed, 7 Jun 2006 13:56:05 -0700 (PDT)

Subject: Re: [C320-list] Single Line Reefing

Irv, The pulley idea originally came from a Mainsheet article in
the C380 tech section a year or two ago. If you have the back issues, you
should be able to find it. You rig the 320 reefing system excatly the same
way. Works great. Walter Selkie #887 Irv Grunes
<igrunes at comcast.net> wrote: Stan, Thanks for the reply. Again yours
is an elegant solution and the fact that everything is run through
pulleys elimintes a lot of the friction. If one would do the same to
the leech luff, theneverything would be throgh pulleys. Thats just a
thought. Did you do anything to the mainsail to protect it from any
chafe by the block working against it? When the sail is down and
furled, that block must just sit there and not bother the sail
cover. As you can see I am trying to visualise any and all problems. I
realised that it will be necessary to change the reeving on the mast
base blocks so that the existing
block will be the last block before the line goes into the boom. Irv
Grunes Isle of Wight #851 -----Original Message----- From:
C320-List-bounces at catalina320.com [mailto:C320-List-bounces at catalina320.o
rg]On Behalf Of Stanley Rogacevicz Sent: Wednesday, June 07, 2006 1:10
PM To: C320-List at catalina320.com Subject: Re: [C320-list] Single Line
Reefing Irv, I figured my explanation might come up short. The
block stays with/at the same level (well, maybe a couple inches below at
most) as the reefing cringle it replaced because the little line that
passes through the cringle/gromett is only long enough for attachment.
When reefed the block would end up in the boom area but since it is being
pulled down by the block at the mast base that's fine. My addition did
involve switching a couple block leads around. I'm assuming as did a
couple other posters that you already have a single line reefing standard
on your
boat --- I did *-- I just wanted to reduce the friction of the line
passing through the reefing cringle by - replacing - it with a block =
less friction. No... I don't remember the block I used. Many of my
projects are simply find what looks right and make it
work. Stan >>> igrunes at comcast.net 6/7/2006 12:48 PM >>> Thank
you Stan. I think its a very elegant way to mount that block. If you
can remember the block you used it would be appreciated. Also, with the
sail fully raised about where did the block finally rest? Did the block
rest on the sail or was it at or just above the boom? How did you keep
the block from flopping around or did the fact that the reefing line was
through the block, it kept it from flopping too much. If I picture it
correctly, there is about two feet from the sail tack to the luff reefing
cringle, then you would only need to have that two feet to pull it down.
I assume there was enough room below
the boom to pull it down. Thanks for the reply. Irv Grunes Isle
of Wight #851 -----Original Message----- From:
C320-List-bounces at catalina320.com [mailto:C320-List-bounces at catalina320.o
rg]On Behalf Of Stanley Rogacevicz Sent: Wednesday, June 07, 2006
11:42 AM To: C320-List at catalina320.com Subject: Re: [C320-list] Single
Line Reefing Irv, I did it, but it's one of the very few
things I never posted a picture of and it's a bit hard to describe. I
used a large SS washer (too big to pass through the grommet) with a small
hole on one side attached to a small block on the other side of the sail
grommet. I passed a small line (about 3/16) through the washer, then
through the grommet, then through the body of the block, then back
through the grommet, back through the washer, and then tied the two ends
together with a big enough knot to keep it from passing through the
washer. Not very elegant, but by
not using any sharp metal objects for connections it didn't damage the
sail and did the job. Stan (formerly) Christy Leigh c320
#656 Wickford/Narragansett Bay RI >>> igrunes at comcast.net 6/7/2006
11:17 AM >>> Guys, There was a thread a year or so back about single
line reefing. I just sent the following to my boat partner. Is
there any album that shows what people used for the luff
pulley described below and has anyone actually done this?. I don't
remember it right now, but there is supposed to be a way
to make reefing a single line control by addig a pulley to the main
luff reefing cringle. Then reeving the port side reefing line from the
cockpit stopper to the deck mast pulley(where it now is), up through
the new luff reefing pulley, down to a new mast base pulley, into the
boom then to the leech cringle as we now have it, then to tie off at
the boom. The key being a pulley on a strap of some kind
on the luff reefing cringle. The main objection to this as I remember it,
was all of the resistance that is encountered by the lines going through
all of the pulleys. This would eliminate the need to go on deck in
possible bad weather to reef the main. Irv Grunes Isle of Wight
#851 
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