Show me where I said a Cunningham in use increases
sail area. I believe I said using a Cunningham allows
a full sail that fits into the triangle to be flattened for
efficiency to weather without its exceeding the dimensions
of the triangle.

I further stated that the Cunningham is a cheat because it
serves a similar purpose as does a sliding gooseneck that
flattens the sail more efficiently than does a Cunningham but
is not allowed by the rules if it results in the boom being
drown down below the lower black line on the mast.

Cunningham cringles and Cunningham tackle allow a mainsail
to be purpose-built fuller than normal to fit the lines and then
allows it to be stretched with just a little inefficiency below
the cringle to a flattened state-a state that if flattened by a
sliding gooseneck the result of which is a violation of the
rules. As long as there is not a flap of sailcloth that hangs
below the black line the rule is not broken if fact although
it is without a doubt being broken in spirit.

I hope this helps.


"Oz1" wrote in message ...

Prescribed triangle?
Yep, that means that if you do as you say, you make a larger than
prescribed/allowed triangle and hence become in breach.
Cappy the black bands are there for a reason!

Now, following your formula,
the wind strengthens to the stage that you require ever increasing
cunningham to maintain the shape (the purpose of the device).
All the while you are increasing sail area? See anything wrong here?


On Sun, 6 Jul 2003 21:59:03 -0400, "Simple Simon"
wrote:



Oh ye of limited imagination. Picture a nice full mainsail that fits
into the prescribed triangle. Now picture a sliding gooseneck on
the boom. Now, for going upwind haul down hard on the down
haul so the boom is about a foot lower than the prescribed
triangle allows. Voila! You have a bigger sail than allowed.


"Oz1" wrote in message ...
On Sat, 5 Jul 2003 12:26:59 -0400, "Simple Simon"
wrote:

You are on the right track. For the answer go to uk.rec.sailing
and see my reply to the 'Reason why Columbia beat Sceptre'
thread.

Hello,
How is it possible "to have a bigger mainsail for the same measured
sailarea " ?

Luff is measured, leech is measured, foot is measured and then
depending on the system used, usually a number of girth measurements.
This system measures the area of the sail.
Pulling on a cunningham doesn't change that!

Oh and how by pulling on the halyard do you "stress the leech"?
Unless of course you don't have a clue.

Oz is clearly clueless.

Hmmmm ya think?


"Peter S/Y Anicula" wrote in message ...
I'll have a guess at this one:
Because it allows you to have a bigger mainsail for the same
measured sailarea than if you used the halyard to the same
purpose.

Another advantage is that it is takes less power to tighten
the cunningham than it does to tighten the halyard. This
makes it usable on cruisers as well.

There are other factors but I don't think that matters much.
To mention one thing, it also stresses the leach if you use
the halyard, but that can be compensated by the tension of
the boom vang or by adjusting the traveller.

--
Peter S/Y Anicula



"Simple Simon" skrev i en meddelelse
...
Let's see if you are a real sailor and can answer this
question without looking up the answer.

Why was the Cunningham invented?




"Capt. Mooron" wrote in message
...
Briggs Swift Cunningham Jr. the captain of the winning
yacht in the 1958
America's Cup has passed on to the pearly gates. In 1958
he invented the
"cunningham"......
Amazing but true facts of sailing.

CM










Oz1...of the 3 twins.
I welcome you to crackerbox palace,We've been expecting you.




Oz1...of the 3 twins.
I welcome you to crackerbox palace,We've been expecting you.