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A Super Yacht for the 21st Century - One of
the world's most advanced ocean racing yachts.
The Nicorette yacht was launched as the world’s first IRM/IRC 2000
Maxi. She boasts a carbon fibre sandwich construction; a huge sail
to weight ratio; water ballast and numerous high-tech design
features, including an America’s Cup style keel with trim tab. She
was designed by Dutch company, Simonis/Voogd and built by Concept
Yachts CC in Cape Town and launched in December 1999. Since then,
she was fitted with a canting keel in 2003, which replaced the water
ballast system, and now in 2004, a new hull, keel and mast are being
updated in and endeavor to win the 60th Rolex Sydney Hobart Race.
Today’s racing yachts are miracles of modern technology. But
ultimately, they still use wind as their only source of power. Here
are some of her special features:
All carbon construction:
Nicorette is built using a carbon fibre sandwich construction, where
a carbon fibre skin has been laminated on each side of a 30mm NOMEX
core with epoxy resin. The structures have been packed in a plastic
film to allow a vacuum to be applied to the sandwich while the
entire boat has been ‘baked’ in an oven to allow complete curing.
Carbon fibre provides the right combination of low weight and
strength which she needs for ocean racing. This is why she weighs
only 20 tons – and 8.5 tons of that is in the lead bulb at the
bottom of the keel. A technologically advanced yacht of similar size
to Nicorette, but built 10 years ago would have weighed 35 tons. The
bow is a little stronger than the aft section because it has to take
greater loads in big waves. It also contains a sacrificial bow for
impact resistance in case Nicorette hits an object in the water.
Sails:
Nicorette’s sail ‘wardrobe’ will depend on the expected race
conditions and is constrained by her IRC handicap. A typical
wardrobe for the Sydney to Hobart could be one racing mainsail; up
to seven jibs or foresails; two staysails, which go between the
mainsail and the foresail or spinnaker and seven spinnakers, which
are the large colourful sails used when the wind is blowing from the
aft, or rear, of the yacht.
In certain conditions, Nicorette could have enough sail area hoisted
to cover more than four tennis courts put together - up to 1000
square metres of sail at one time.
Nicorette’s mainsail and foresails are D4 sails, which refers to the
way they are constructed. Rather than weaving the sail material,
individual strands of Kevlar or carbon , an extremely strong and
flexible material, are laid according to computer calculations to
counter precisely the forces which the sail will encounter. The
strands are glued between sheets of mylar film. The sails are made
by Doyle Sailmakers manufactured in the USA, New Zealand and
Australia. The racing mainsail and all racing jibs are made in the
new Fraser/Doyle D4 technique. Fully rigged, she has one of the
largest sail-to-weight ratios of any racing monohull yacht on the
water today, making her astonishingly fast downwind.
Nicorette ‘s Triple Moving Foil System.
The TMF system, comprising a traditional rudder, canting keel and
canard , Nicorette’s unique new keel system represents the very
latest in Maxi yacht design. The combination of advanced features
will put her amongst the fastest yachts in this year’s Sydney Hobart
fleet and makes her ready for the astonishing diversity of
conditions this race can throw up.
In addition to the TMF system, she returns to the Sydney Hobart with
a bow sprit to carry larger, more powerful spinnakers and special
compound, multi-layered, pearl-effect coating to create a dramatic
impact on the water.
Canting keel:
Ever since the Australian America’s Cup Challenger Team won the Cup
in 1982 on Australia II, keel design has been widely known to be
crucial to a yacht’s speed and efficiency. In October 2003,
Nicorette was redeveloped with a canting (or swing) keel. Canting
keels are not new technology, however, the rules for offshore racing
yachts have only recently started to allow canting keels. This will
be only the second year that canting keels will be used in the Rolex
Sydney Hobart race. A canting keel can be deliberately ‘swung’ to
windward to give a yacht more stability in stronger winds. Stability
is crucial for efficient racing. Racing yachts are designed to be at
their most efficient when slightly ‘heeled’ over. Nicorette’s most
efficient range of heel is 10 – 16 degrees. At one extreme, when
standing entirely upright, she would be slowed down by a higher ‘wet
surface’ (resistance) but at the other extreme, when heeling over 16
degrees, the hull will lose symmetry, projected sail area and ‘grip’
of the keel. Two powerful hydraulic rods inside the yacht control
the angle of the keel to counter the heeling force by the wind in
the sails. Each is capable of applying 80 tons of push or pull to
swing the keel into its optimal angle. To put it another way, each
is capable of lifting 160 tons, a weight 8 times that of the yacht.
As the wind becomes stronger, Nicorette’s canting keel will be
adjusted within the limits set by the rules to keep her within that
efficient range before having to reduce sail area.
The keel is 4.6 metres long, but only 40cm wide and 80 mm thick at
its thickest point. The bulb of lead at the bottom weighs 7.5 tons –
almost half the total weight of the yacht. The bulb design is a
torpedo style design for minimal resistance for the mass of lead it
contains.
The Canard
When the keel, which is very small for this size of boat, is not
providing enough ‘lift’ the Nicorette can lower a canard, or a
centreboard which is located forward of the mast and the keel. The
canard also has a trim tab to allow it to generate further lift as
the trim tab makes the canard an asymmetric foil. The canard is only
used to the extent required for upwind sailing. While sailing with
the wind, the Nicorette crew will lift it up to decrease resistance
in the water and increase speed
Bow Sprit
The Bow Sprit is a short sword-like pole projecting from the front
of the bow. On Nicorette the crew can attach spinnakers to the end
of the bowsprit in order to get larger separation (gap) between the
mainsail and the spinnaker. The bowsprit also helps to keep the
spinnaker pole down through a tackle attached between the end of the
Bowsprit and the end of the spinnaker pole. With a strong wind
filling the largest, 600 square metre spinnaker, a force of many
tons is transmitted through the halyard to the top of the mast, and
through the spinnaker sheet and spinnaker pole to the hull, giving
it massive forward thrust allowing the Nicorette to surf with speeds
over 30 knots.
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