Tuning the mast
Fasten the shrouds to the eyes of the
chainplates, as shown in the diagram on
Page 7.
The forestay/roller furling system is of fixed
length and has no rigging screw. Tighten
the standing backstay tackle so that the
mast bends aft.
Tension the upper and middle shrouds
equally, so that the section flexes forward
by roughly 2 mast widths. Then draw the
mast back by one mast width using the
lower and auxiliary shrouds. To do this,
measure the distance between the threaded
rods in the rigging screws.
Now tension the remaining shrouds in pairs,
one after the other.
A glance up the mast track will reveal
whether the shrouds have been tensioned
equally: the mast track must be straight and
there should be no S-bend in the mast.
The standing backstay must always be
under tension when sailing. The limit strop
prevents the line from running out.
Fig. 10 Shrouds can be tensioned more easily with a
mole wrench & spanner.
A 21mm open-jaw spanner (or mole
grips) and a spanner of sufficient size
are suitable tools for tensioning the
A permanently attached and taut Main
halyard secured to the gooseneck can
be used to monitor the success of the
tuning operation
The clevis pins in the rigging screws
should run through the chainplate
eyes from outboard to inboard. Wrap
tape round the rigging screws to
prevent the sharp ends of the split
pins, used for securing, from causing
11
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