Viper Owner's Manual 42
4.4.4 RIG TENSION
The rig tension is in general high to avoid the forestay sagging. If the tension is too high then the
mast will not rotate easily. The tension will range from 50kg in light winds up to 100kg in windy
conditions.
4.4.5 MAST RAKE
Mast rake affects the trim and balance of the boat. If the boat is sailed with too much mast rake the
boat feels a bit heavy on the rudder and it won’t accelerate out in the gusts. Insufficient mast rake on
the other hand can induce a feeling of lee helm when sailing the boat.
The mast rake is measured with the forward
trapeze wire.
Measure the distance to the attachment point of
the forestay (bridle) in the hull. This requires the
trapeze to be extended with a rope. Mark the
rope where it touches the chain plate
Swing the front trapeze to the back of the boat
and take the distance measured to the transom.
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