Nordic Mast & Spirit Yachts
Contact details
ABOVE The carbon lamination process requires a great deal of detail attention to detail
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personnel who ensure they fit the
unique requirements of each particular
project. Finally, the tube is painted to
protect against UV light.
The masts for Spirit Yachts were
delivered by special transport and
rigged by the yard’s own personnel.
However, customers are also given
the option of having Nordic Mast
personnel rig and directly maintain
their masts.
Many customers also choose to sail
with a Nordic Mast rigging crew on the
first trial to fully ensure that the mast
and rig is correctly installed and that
they gain maximum value from their
considerable investment.
ABOVE The new Spirit 58 competing at this year’s British Classic Yacht Club regatta
carbon fibre grades used are High Mast’s own in-house software custom-
Strength modulus (HS) Panex and made for the oven curing in autoclave
High Modulus (HM) HS40. During the conditions. The total process time
process of packing prepregs into the depends on the mast size but it is
mould, vacuuming is used when all the usually 7-19 hours. The cure cycle
unidirectional fibres are in place, then is carefully monitored and stored
once again when all the reinforcements electronically in a mast history folder.
are in place. After curing, the hardened mast is de-
On its bigger masts, Nordic Mast moulded and its weight and centre of
uses vacuuming several times. All gravity are checked. Bending tests fore-
reinforcements are added at the lay- aft and sideways are then performed
up stage and no wet lay-up or post to confirm satisfactory tube properties.
curing is needed. A pressure bag is All cut-outs are kept and stored for
inserted into the mould tool and, once examination. Brackets and other carbon
the mould is closed, the pressure bag fittings are then glued onto the mast
is inflated to 4.0 bar of pressure. The section. Many of these brackets are also
mould tool is then placed into the oven custom made by Nordic Mast’s skilled
and the mast is cured at 110°C.
Both the pressure and temperature RIGHT Different types of carbon were used in the
are computer controlled using Nordic construction of the Spirit 58’s mast
www.europeanboatbuilder.net s August/September "#
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