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6.1 Rig Tension.
As a pre-requisite, all boats should be set up with a degree of pre-bend in the
mast – 50-60mm as a minimum to ensure the sail sets acceptably in light
winds. Beyond that, all the settings are dependant upon your weight or the
conditions. All you can do is rig up within the acceptable minimum and
maximum settings, giving us minimum and maximum power guidelines, and
adequate support for the mast.
Mast rake
Tip of mast/gudgeon
Rig tension
Measured on shroud
Spreaders – length
Mast to shroud
Spreaders – sweep
Shrouds to mast track
Prebend
The only one of these that we might adjust for different wind strengths is the
rake. Maximum power 7360mm will be 3-8kts for everyone, with bigger sailors
hanging on to it a bit longer. Whereas minimum power 7060mm is fully raked
up, flattener in and board fully raked – light sailors 16/18 kts, heavier sailors
20kts+.
As regards rig tension and spreader settings, that is down to your weight and
venue. The approximate spread of sailor weight is 67kg-95kg, and that would
correspond to minimum and maximum power settings. If you weigh 80/85 kgs
and are medium height then somewhere in the middle will not be far wrong.
6
TUNING GUIDE
Min power
7060mm
150kg
400mm
220mm
125mm
27
Max power
7360mm
220kg
450mm
140mm
50mm
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