MUSTO Skiff batten
Tension by Mike Lennon (MD Hyde Sails)
Every thing has an ultimate strength
and it is of course the manufacturers responsibility
to ensure their products are strong enough to with stand
the extreme abuse with in a known range of load.
Knowing what that is either comes from extensive testing
in the lab or field, but often from experience also.
When we embarked on developing the Musto Skiff sails we did
not foresee the huge loads now applied through the batten
pockets, and as we strengthen one area to stop failure,
the loads are passed on to the next weakest point.
The failures that occoured in the Musto Skiff have not come
to light in any other class -- Some boats only get very
light loads, but some that you would expect to be similar
or greater still, have only had the odd incident. So
what is going on in the Musto Skiff ?
Someone discovered batten tension appears to make the
boat go faster -- When I am asked how much tension to
use in a batten, I generally say just enough to remove
the wrinkles. The Musto Skiff class is the most extreme in its
batten set up than any other I am aware off -- I am
interested to know the theory as to what is going on
and why its faster ? But my more mundane concern is
that the sail is simply not designed for this. Now we
have strengthened the plastics used at both ends of
the pocket, my concern is what is going on with the
very high local loads in the sailcloth, and sewing along
the seams and pocket.
I know that whilst its considered fast to load the pockets,
warnings from the sailmaker not to over do it will go
by the wayside. But the sail was not designed for this
and if it were, we would have had reinforced the pockets
and sail body locally.
We also think some are going way past the sweet point
and it may be worth consulting with some fast sailors
regarding the right tension before going for it !!
discussion here >>>
Image below discussed on the