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Gerard Weatherby
 
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Default Cunningham

Cat's Meow is sailng with a new mainsail this year. The sail has a separate
grommet for a downhaul (Cunningham) in additional to the tack. Given I'm
working with a single winch on the mast, does it make more sense to use the
winch for the main halyard and tighten the downhaul by hand, or raise the main
by hand and use the winch for the downhaul? I tried raising the main by hand
yesterday in a relatively* brisk wind, ~15 knots, and it didn't seem like the
main got raised enough.

*Relative to the usual Long Island Sound light air.

S/V Cat's Meow
http://www.catsmeow.org
  #2   Report Post  
Simple Simon
 
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Default Cunningham

Real boats have a sliding gooseneck so one can raise the
mainsail to the top black line and allow the boom to slide
up for ease of uphauling without a winch. Once the halyard
is made fast, tension along the luff can easily be made by
drawing down on the boom using the mainsheet so the
downhaul can be cleated off.

Cunningham cringles and tackle are something that are
totally unnecessary on any boat with a sliding gooseneck.
This is but another advantage of a boat that is set up to
cruise instead of to race. Cunningham gear is just a way
to get around the rules of racing and as such should be
used only on racing yachts.


"Gerard Weatherby" wrote in message ...
Cat's Meow is sailng with a new mainsail this year. The sail has a separate
grommet for a downhaul (Cunningham) in additional to the tack. Given I'm
working with a single winch on the mast, does it make more sense to use the
winch for the main halyard and tighten the downhaul by hand, or raise the main
by hand and use the winch for the downhaul? I tried raising the main by hand
yesterday in a relatively* brisk wind, ~15 knots, and it didn't seem like the
main got raised enough.

*Relative to the usual Long Island Sound light air.

S/V Cat's Meow
http://www.catsmeow.org



  #3   Report Post  
Wally
 
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Default Cunningham

"Simple Simon" wrote in message

... Once the halyard
is made fast, tension along the luff can easily be made by
drawing down on the boom using the mainsheet so the
downhaul can be cleated off.


Would I be right in thinking that the kicking strap could be used to pull a
sliding gooseneck downwards?


--
Wally
I demand rigidly-defined areas of uncertainty!
www.art-gallery.myby.co.uk



  #4   Report Post  
Simple Simon
 
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Default Cunningham

I don't see why not.


"Wally" wrote in message ...
Would I be right in thinking that the kicking strap could be used to pull a
sliding gooseneck downwards?



  #5   Report Post  
Wally
 
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Default Cunningham

"Simple Simon" wrote in message news:yqGdnfnqrp-

I don't see why not.


Cheers. My boat (not in the water yet) has one and I've been wondering if
perhaps another bit was missing. (The previous owner seemed to think that a
tiller and a kicking strap were unneccesary luxuries.)


--
Wally
I demand rigidly-defined areas of uncertainty!
www.art-gallery.myby.co.uk





  #6   Report Post  
Jack Dale
 
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Default Cunningham

On Thu, 17 Jul 2003 18:42:40 -0400, "Simple Simon"
wrote:

Real boats have a sliding gooseneck so one can raise the
mainsail to the top black line and allow the boom to slide
up for ease of uphauling without a winch. Once the halyard
is made fast, tension along the luff can easily be made by
drawing down on the boom using the mainsheet so the
downhaul can be cleated off.

Cunningham cringles and tackle are something that are
totally unnecessary on any boat with a sliding gooseneck.
This is but another advantage of a boat that is set up to
cruise instead of to race. Cunningham gear is just a way
to get around the rules of racing and as such should be
used only on racing yachts.


Real "little" boats use a sliding goosenecks and downhauls, real big
boats use riveted goosenecks and cunninghams. When I race a San Juan
21 we use both a downhaul for rough sail shape and a cunningham to
fine tune. The larger boats I sail have riveted goosenecks and
cunninghams.



"Gerard Weatherby" wrote in message ...
Cat's Meow is sailng with a new mainsail this year. The sail has a separate
grommet for a downhaul (Cunningham) in additional to the tack. Given I'm
working with a single winch on the mast, does it make more sense to use the
winch for the main halyard and tighten the downhaul by hand, or raise the main
by hand and use the winch for the downhaul? I tried raising the main by hand
yesterday in a relatively* brisk wind, ~15 knots, and it didn't seem like the
main got raised enough.

*Relative to the usual Long Island Sound light air.

S/V Cat's Meow
http://www.catsmeow.org



Raise your main (with a winch if necessary) until you get a loose fold
along the luff. Use some sort of a purchase system (a block and
tackle with a cam cleat) for the cunningham to adjust the position of
the draft of your main. Attach a hook to the cunningham cringle and
the other end to the base of your mast. Harden the cunningham to
move the draft forward, ease the cunningham to move the draft aft.

Briggs is probably doing a rollover.

Jack
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Marty Browne
 
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Real boats-schmeel boats. a fixed gooseneck properly attached to the
mast is mechanically stronger than the sliding gooseneck on the track.
And there is a weight savings by not needing all the heavy gooseneck
track and heavy gooseneck. Having a fixed gooseneck, means that you
don't have to worry about the forward end of of the boom damaging heads,
fingers or other body parts. A second benefit derived from the fixed
gooseneck rig is that the modern "kicker boomvang" can be used rather
than a preventer vang lead from the rail up to the boom.

If you have older style rig with sliding gooseneck, I would seek the
opinion of a skilled spar-maker/worker before discarding the sliding
gooseneck rig. Some masts and booms will need additional re-enforcement
before installing that fixed gooseneck.

About the right amount of cunningham tension.------ On most of the boats
that I race on, the main halyard controls the top 2/3 of the luff and
sail shape. The Cunningham controls the bottom 2/3 of the luff and sail
shape. I didn't make a typo. Even though it doesn't make sense, that is
exactly what is happening on most boats that have a good racing main.
The halyard affects both the luff and the leach; it changes the draft
location and effect a slight flattening or fullness at the top of the
sail. The cunningham effects the bottom luff tension and bottom section
of the sail. It doesn't have a major effect on the foot shape or outhaul
tension. How much cunningham or main halyard to use or not use is part
of the art of the sailor.

I own a Sonar. Our fractional rig is very different from the old
masthead IOR & IMS rigs that I used to race every weekend. I also race
an AERODYNE 38. It has a huge, full-battened main with a tremendous
roach and a 105% jib. we are learning that the Etchells and Sonars that
some of the crew race are more closely related to that 38' offshore boat
than the masthead IOR and IMS boats the owner used to race. Makes for
interesting learning experiences.


If you have a "cruisier" main, you will see less effect as you try to
tweak the various controls. The sail has been built to have a wider
range of acceptable tensions. it will be less responsive to minute
changes in outhaul and main luff(halyard & cunningham) tensions. But it
will be easier to trim and make fast.
good luck and have fun.



Jack Dale wrote:
On Thu, 17 Jul 2003 18:42:40 -0400, "Simple Simon"
wrote:


Real boats have a sliding gooseneck so one can raise the
mainsail to the top black line and allow the boom to slide
up for ease of uphauling without a winch. Once the halyard
is made fast, tension along the luff can easily be made by
drawing down on the boom using the mainsheet so the
downhaul can be cleated off.

Cunningham cringles and tackle are something that are
totally unnecessary on any boat with a sliding gooseneck.
This is but another advantage of a boat that is set up to
cruise instead of to race. Cunningham gear is just a way
to get around the rules of racing and as such should be
used only on racing yachts.



Real "little" boats use a sliding goosenecks and downhauls, real big
boats use riveted goosenecks and cunninghams. When I race a San Juan
21 we use both a downhaul for rough sail shape and a cunningham to
fine tune. The larger boats I sail have riveted goosenecks and
cunninghams.



"Gerard Weatherby" wrote in message ...

Cat's Meow is sailng with a new mainsail this year. The sail has a separate
grommet for a downhaul (Cunningham) in additional to the tack. Given I'm
working with a single winch on the mast, does it make more sense to use the
winch for the main halyard and tighten the downhaul by hand, or raise the main
by hand and use the winch for the downhaul? I tried raising the main by hand
yesterday in a relatively* brisk wind, ~15 knots, and it didn't seem like the
main got raised enough.

*Relative to the usual Long Island Sound light air.

S/V Cat's Meow
http://www.catsmeow.org



Raise your main (with a winch if necessary) until you get a loose fold
along the luff. Use some sort of a purchase system (a block and
tackle with a cam cleat) for the cunningham to adjust the position of
the draft of your main. Attach a hook to the cunningham cringle and
the other end to the base of your mast. Harden the cunningham to
move the draft forward, ease the cunningham to move the draft aft.

Briggs is probably doing a rollover.

Jack


  #8   Report Post  
Thomas Stewart
 
Posts: n/a
Default Cunningham

Gerard,

I hate that damned wench on the mast. I don't know what size sail you
have but I have a 35 ft hoist and I see no reason to use that (SAIL
DESTROYER) to raise that Main. I sail with a female crew and they will
continually use that wench. I keep telling them that if they stretch
that main that they will buy me a new sail but if I'm not watching them
they are sure to put those couple of extra turns on there. Now, I'm not
putting all the blame on the girls. My male crew member are stronger
than the girls and they put a couple of turns on the wench and haul in
up by hand, usually more than tight enough but they have to grab the
handle an over tighten The say just snugging it up. Yeah right! With the
first tack the upper batten has trouble coming across without inverting

Now, with that off my chest, I've mounted the cunningham hook at the
gooseneck. When I need cunningham, I have a line thru the cunningham
with a loop to the hook and the other side thru a block and back to a
jam cleat on the boom at the main sheet traveler. The main sheet trimmer
can haul it in by hand. I watch the upper batten. If he draws it in past
parallel to the boom we ease the main halyard. If we can't get the
batten into position with main sheet trim and backstay tenson, I allow
main halyard adjustment with the wench,

Sorry, a long winded answer to setting up cunningham with single wench.

Ole Thom

 
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