Would someone explain to me a clew strap?
 

My boat came set up for racing as I imagine a lot do. Apparently,
because my main is loose footed, I have a clew strap, but I don't know
how to use it correctly.

Would any of you care to explain this to me?

Thank you.

Rick wrote:
My boat came set up for racing as I imagine a lot do. Apparently,
because my main is loose footed, I have a clew strap, but I don't know
how to use it correctly.

Would any of you care to explain this to me?


The clew strap goes around the boom. It takes the vertical load from the
leach of the sail and holds the boom closer to the foot than if it was
supported by the outhaul alone. It also allows the outhaul to be eased
have the clew slide a little bit towards the mast, in order to control
the shape (deeper curvature for going downwind or light winds).

Hope this helps.

Fresh Breezes
Doug King

Doug's explanation is good.
What is this boat?
S.

"Rick"

wrote in message
...
: My boat came set up for racing as I imagine a
lot do. Apparently,
: because my main is loose footed, I have a clew
strap, but I don't know
: how to use it correctly.
:
: Would any of you care to explain this to me?
:
: Thank you.

Thanks for the explanations.

Doug King wrote: It also allows the outhaul to be eased
have the clew slide a little bit towards the mast, in order to control the
shape (deeper curvature for going downwind or light winds).

I must disagree with you just a little bit here, Mr. King. "Deeper
curvature" may be fine for light wind when going in almost all points of
sail, but as a rule, a boat that 'has been set up for racing' will probably
do better with a flat main when going downwind. Think of barn door. That
is the best shape for the main when going downwind in most situations, at
least on a race boat. There may be circumstances were more draft in the
main will get you more performance in a not so finely tuned boat while
sailing downwind, however.

Rick, I am sorry I do not know what boat you own, but if it is a race boat,
then it is a good idea to experiment and learn what all of the controls for
your sails will do in different conditions, on different points of sail.
However, it may not matter as much on a family cruiser, as they will not be
as responsive to your tuning.

Lonny
--
Enjoy my new sailing web site
http://sail247.com


"DSK" wrote in message
. ..
Rick wrote:
My boat came set up for racing as I imagine a lot do. Apparently,
because my main is loose footed, I have a clew strap, but I don't know
how to use it correctly.

Would any of you care to explain this to me?


The clew strap goes around the boom. It takes the vertical load from the
leach of the sail and holds the boom closer to the foot than if it was
supported by the outhaul alone. It also allows the outhaul to be eased
have the clew slide a little bit towards the mast, in order to control the
shape (deeper curvature for going downwind or light winds).

Hope this helps.

Fresh Breezes
Doug King

Doug King wrote: It also allows the outhaul to be eased
have the clew slide a little bit towards the mast, in order to control the
shape (deeper curvature for going downwind or light winds).


Lonny Bruce wrote:
I must disagree with you just a little bit here, Mr. King. "Deeper
curvature" may be fine for light wind when going in almost all points of
sail, but as a rule, a boat that 'has been set up for racing' will probably
do better with a flat main when going downwind.

And you base this on what... Horvath's aerodynamic theories?

... Think of barn door. That
is the best shape for the main when going downwind in most situations, at
least on a race boat. There may be circumstances were more draft in the
main will get you more performance in a not so finely tuned boat while
sailing downwind, however.

Sorry, I disagree. On the few racing boats where the outhaul isn't eased
going downwind, it's usually because the leg is short and/or there are
more important things to do.

If your theory were correct, you'd see the America's Cup guys tightening
their outhauls rounding the windward mark.



Rick, I am sorry I do not know what boat you own, but if it is a race boat,
then it is a good idea to experiment and learn what all of the controls for
your sails will do in different conditions, on different points of sail.


I agree. The best place to find out about this is firsthand
demonstrations by guys who are out there winning races in your class.
Hot air over the internet has even less value than hot air produced
locally....

DSK

Rick,

I guess we all have been missing the point and talking around it.

The "Clew Strap" is to hold the clew of the Main Sail down.

Most outhauls were designed to control the foot tension on the sail that
had a bolt rope sewed into the foot of the sail and held in place by a
groove in the boom or slugs connected to the bolt rope in the foot. The
Outhaul wasn't designed to provide leech tension.

With the "Free Footed Main" the outhaul is given a job it wasn't meant
to do. The Clew Strap takes the leech tension away from the outhaul.

With a Clew strap the Vang tension is transferred to the leech with a
Free Footed Sail; Using the whole boom, rather than just the "Slot" and
the outhaul car.

Ole Thom

Thom Stewart wrote:

Rick,


With a Clew strap the Vang tension is transferred to the leech with a
Free Footed Sail; Using the whole boom, rather than just the "Slot" and
the outhaul car.

I would think that if you have an outhaul car or a slug, then you would not neet
a Clew strap as either of these devices will transfer leach tension to the boom,
if however you have neither then you'll definately benifit from a strap.

Cheers
Marty