[Public-List] Reefing/furling
Don Campbell
dk.campbell at xplornet.ca
Wed Oct 4 13:47:07 PDT 2017
Two thoughts: first the stay sail. The sail plan on the AL30 is a
gerrymandered rig because of Humber Bay in Toronto, (also known as Slumber
Bay). It was designed by Alberg as a fractional rig and Kurt raised it to a
masthead rig because of light summer winds in Toronto. I know of only one
deck that can withstand the force of a baby stay without further
reinforcement and that was Hull number 7 and sail number in the 20's, owned
by Denis Furniss. There was an oak plank, 2" x 14" from the bulkhead to the
deck head piece under the deck to support a windlass on that boat. Denis was
the mold maker for Kurt. He could do as he liked on the hull . (He also had
a roll-out double bed in the main cabin). Consider the geometry of the
sail plan if you do change. We already have a center of effort (CoE) that is
aft and so helm can be a problem. Having a sail on the forestay keeps the
CoE of the foresail forward and also that of the combined CoE forward.
Pointing ability will be better with the sail on the forestay. As long as
one can establish a slot between foresail and main, things will work well.
On the other hand, Joe Fernandez, the sail builder for most of the original
sails on AL30s had a rule of thumb that went like this: For racing; Up to
15 knots use full sail allowed (163 jib and full main). Between 15 and 22
knots use a smaller foresail (135 -150) and one reef in the main. More than
22 knots take the main down and sail on the jib! Don't forget that you
develop between 65 and 70% of your power from your foresail. Why you want to
reduce that potential is questionable in my opinion.
Second thought: As for the area of a sail and decksweepers, old math
states the area of a triangle is 1/2 the base x height. and height is the
perpendicular from the apex(clew) to the base (luff). Therefore as long as
the angle at the tack from head to tack to the clew is less than 90
degrees, the perpendicular to the luff is the same regardless of whether the
sail is high cut or decksweeper. The only way to get more area is to
increase the perpendicular distance.
Don
-----Original Message-----
From: Gordon Laco via Public-List
Sent: Wednesday, October 04, 2017 1:58 PM
To: George Dinwiddie via Public-List
Cc: Gordon Laco
Subject: Re: [Public-List] Reefing/furling
Yes... so long as the very tight wraps resulting from furling in heavy air
are relieved once the yacht is in quieter conditions.
Gord #426 Surprise
On 2017-10-04, 1:55 PM, "Public-List on behalf of Rod Symmes via
Public-List" <public-list-bounces at lists.alberg30.org on behalf of
public-list at lists.alberg30.org> wrote:
So - can I extrapolate from this that kinder than flaking or stuffing
would be rolling it up on the foil because there would be no creasing ?
(Assuming a good sunshade edge, of course )
Cheers, Rod
-------- Original message --------
From: Gordon Laco via Public-List
Date:04-10-2017 12:42 PM (GMT-05:00)
To: Michael , George Dinwiddie via Public-List
Cc: Gordon Laco
Subject: Re: [Public-List] Reefing/furling
Hello Michael –
In my wooden boat days, I used to punish my genoa for a bad race by
stuffing it, and reward it for a good race by folding it...
I’ve heard the folding vs stuffing debate too, and reckon the
stuffing-may-be-better theory is debunked... folding generally considered by
the industry as better for sail longevity.
Gord #426 Surprise
On 2017-10-04, 12:32 PM, "Public-List on behalf of Michael via
Public-List" <public-list-bounces at lists.alberg30.org on behalf of
public-list at lists.alberg30.org> wrote:
There is an argument that flaking, folding and rolling a sail after
every use is more harmful to it than just stuffing in the sailbag,
the
same crease more or less being constantly used.
I compromise, stuffing during the season, and folding for winter
storage.
Also, I seem to recall the max dimension #1 Genoa for the Alberg
works
out to 163%. I had a #2 made with full luff and raised clew that
worked
out to 150%. It has become my go to cruising sail (I have a working
jib
for when things get really funky). The decksweeping feature of the
#1
must be a significant addition to total sail area-I have not
calculated.
Michael Grosh
#220
hanked on headsails
------ Original Message ------
From: "charles pleisse via Public-List"
<public-list at lists.alberg30.org>
To: public-list at lists.alberg30.org
Cc: "charles pleisse" <velocharles1 at gmail.com>
Sent: 10/4/2017 10:51:22 AM
Subject: [Public-List] Reefing/furling
>As for keeping the sail out of the water, I have a slight advantage
as
>my
>#1 is a 150%*+* so it is a little smaller than many and it so old
and
>worn
>that it is as compliant as tissue paper. I just untie the clue and
>stuff
>it in the bag as it comes down. When I get a new #1 I'm sure it
will
>be a
>little greater challenge.
>
>Charles Pleisse
>College Park Bicycles
>( <http://www.bike123.com>301)864-2211
>
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