4.4.8 PRE-BEND
Pre-bend of a mast is the result of diamond tension, spreader arms rake and mast stiffness. These
days we do not really measure the pre-bend as the same pre-bend can be achieved by varying the
amount of spreader arm rake and the diamond wire tension on a given mast.
4.4.9 BATTEN TENSION
Battens should be shaped to match the general curvature of the sail. The battens that are
recommended and used are the Fibrefoam battens. These battens are a fiberglass foam sandwich
construction that is light, strong and have excellent bend characteristics.
Battens should be tied firmly into the sail to remove creases along the batten pocket when sailing.
Stiff battens hold the sail flat and help to twist the sail more easily, reducing power.
A soft batten allows the sail to develop more camber and reduces the leach twist, increasing
power.
On the table below is the recommended setting per batten.
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