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Capricorn F18 Owner's Manual v1.2
4.7.
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; the same pre-bend can be achieved by varying the
amount of spreader arm rake and the diamond wire tension on a given mast. This is even further
confused when the mast stiffness varies.
4.8.
Batten tension
Battens should be shaped to match the general curvature of the sail. The battens that are
recommended and used for the Capricorn F18 are the Fibrefoam battens. These battens are a
fibreglass foam sandwich construction that is light, strong and have excellent bend characteristics.
Batten stiffness can affect the camber and twist characteristics of a sail. They are an important aid
for tuning your sail and rig.
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 the recommended setting per batten has been indicated. Batten stiffness and
the bending apex point can be influenced by filing or sanding the batten on the top and bottom,
never on the sides. Note that given settings may vary in time upon the cut of the sail and utilisation
of different fabrics. In doubt always consult your local dealer or AHPC directly for the best settings
on the sail supplied.
Batten number
Batten length
(top-bottom)
(mm)
1
1.100
2
1.220
3
1.520
4
1.785
5
2.015
6
2.160
7
2.225
Battens need to be looked after and stored so that they do not become permanently bent or
twisted.
4.9.
General Sailing Philosophy of Catamarans
"It doesn't matter where you are going as long as you are going there fast."
The element of truth in this statement is that boat speed is ultimately important.
Go fast. Look for pressure then angles; opposite priority compared to dinghy.
Australian High Performance Catamarans Pty. Ltd. – 50 Craig Street – Bendigo – 3550 Australia
Phone: +61 3 544369910 – Fax: +61 3 54412963 – email: ahpc@ahpc.com.au – website: wwww.ahpc.com.au
Pressure to start
bending (kg)
2,5
2,0
1,4
1,2
1,0
1,0
1,0
Bending apex
From front (%)
44
44
44
44
44
44
44
Page 33
Bending apex
from front (mm)
484
537
669
785
887
950
979
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