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  • Gitana 18
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  • Retractable Y-shaped foils, adjustable in three dimensions

    Inspired by the appendages of the America's Cup foiling monohulls, these Y-shaped foils have a wingspan of over 5 metres. They are designed to generate powerful lift, increase power and offer a wide range of adjustments to optimise flight at every point of sail and in all conditions. Beyond their impressive size, these foils feature many unique innovations.

    Revolutionary U-shaped rudders

    These are probably the most visually striking innovations on the new Maxi Edmond de Rothschild. To fly high above rough seas while maintaining control, the team wanted very long rudders that would remain in contact with the water. The challenge is that longer rudders tend to flex under load, severely affecting steering and the efficiency of their lifting surfaces. A new geometry was needed to give these appendages maximum stiffness, resist cavitation and ultimately improve control of the boat and make better use of its power. The result is a set of U-shaped rudders over 4 metres long, a metre longer than those on Gitana 17. Their shape, reminiscent of a tripod or an inverted π, is only the visible part of what makes them so distinctive.

    A daggerboard optimised to stabilise the boat and limit cavitation

    With its wide span, the daggerboard resembles an aircraft tail assembly, with two adjustable flaps: one on the vertical section and the other on the horizontal section, the distinctive “manta-ray wing”. On Gitana 18, the innovation is to position this wing behind the vertical part of the appendage, rather than directly beneath it, to minimise flow disturbance and cavitation.

    Gitana 18’s daggerboard

    Rig: adjustable spreaders to control mainsail power while sailing

    Gitana 18’s mast is 1.50 metres taller than its predecessor’s. The boom is also shorter, creating a more slender sail plan. The major innovation is a set of spreaders that can be adjusted while sailing to bend the mast fore and aft. Actuated by hydraulic rams, these spreaders can pivot through 35 degrees to adjust the bend in the middle of the mast. This unprecedented system allows the sailor to control mainsail power: adding depth in light winds to take off sooner, or flattening the sail to reduce power at high speed or in strong winds. Adjusting the depth, and therefore the power, of the mainsail can also save a solo sailor time and energy by reducing the need for risky manoeuvres or headsail changes.

    Central hull:
    an integrated, structural coachroof

    The naval architects and Gitana design team wanted an exceptionally stiff, structurally robust platform. This applies both to the floats, which must withstand heavy loads from the foils and rudders, and to the central hull, which is subject to torsion. The enclosed coachroof is integrated into the hull and contributes to its structural strength. Inside, the cockpit brings all sail-handling controls together, with ergonomics shaped by many hours of design and development. The coachroof also stands out for the number and size of its windows. This configuration meets the visibility requirements of the Ultim class rules and gives sailors the best possible view to keep a visual watch.

    Gitana 18’s coachroof

    30.05.2008

    Gitana 13 sets sail for Hong Kong.

    Gitana 13 set off on Friday 30th May at 10h33'33'' UT, on its fourth and penultimate record in its Asian tour. The 465 mile course will take Lionel Lemonchois and his crew from Taipei to Hong Kong, from the East China Sea to the South China Sea, passing via the infamous Taiwan Strait. Otherwise known as the Formosa Strait, it separates continental…

    par Gitana

    Gitana 13 set off on Friday 30th May at 10h33’33” UT, on its fourth and penultimate record in its Asian tour. The 465 mile course will take Lionel Lemonchois and his crew from Taipei to Hong Kong, from the East China Sea to the South China Sea, passing via the infamous Taiwan Strait. Otherwise known as the Formosa Strait, it separates continental China from the island of Taiwan. This latest record attempt by the Gitana Team promises to be full-on but quick.

    Awaiting a favourable weather window for several days, the crew of the maxi-catamaran in the colours of the LCF Rothschild Group are aiming for a course time of less than a day and a half. This time should be possible thanks to the current downwind conditions on zone, comprising a steady NE’ly for the majority of the route.

    Of note is that the current Taipei / Hong Kong record has been held by the 47 footer Johan II with a time of 2 days 15 hours 40 minutes and 42 seconds since December 2006. The crew led by Philippe Grelon and comprising French and Kiwi sailors, improved on the time set by Ellen MacArthur by over an hour. This time is recognised by the WSSRC (World Sailing Speed Record Council).

    A few hours before the start, Sylvain Mondon – weather router for Gitana 13 and forecaster of sea safety with Météo France, presented the weather situation to us: “Gitana will benefit from a change in the weather pattern as it leaves the island of Taiwan bound for Hong Kong this Friday 30th May. Indeed, the SW’ly wind reigning for the past four days between the Asian continent and the island of Taiwan didn’t favour an optimal start to beat the course record. A further obstacle was created by an acceleration in the wind in the Taiwan Strait. The mountain chain on the island of Taiwan culminates at 3,997 metres on the east coast of the strait, whilst the vast plateau of Southern China, to the north of Hong Kong, culminates at 1,922 metres. As a result it is with the arrival of a 15-20 knot NE’ly breeze this Friday, building to 20-25 knots in the strait, that Lionel Lemonchois and his crew will attempt to make Hong Kong as quickly as possible in the downwind conditions. Though the start appears simple, despite the multiple gybes, the end will be a lot trickier as the NE’ly air flow is set to ‘abandon’ Gitana 13 for the last 75 miles. The wind will then back to the SW, and the final miles of the course through the South China Sea will be sailed close-hauled in less established winds.”


    Onboard commentary from Nicolas Raynaud

    A fine run in view

    It has to be said that the Taiwanese gave us a very warm welcome during our stay, and were always the height of kindness and efficiency. It has to be admitted that it was also great to cast off this afternoon for our crossing to Hong Kong, which promises to be lively. For over three days, we’ve been patiently waiting for this weather window, which should enable us to cover the 465 miles of the course in less than thirty hours, all being well.
    On the programme is a fine descent under gennaker, with a NE’ly wind which could reach 40 knots from tonight onwards. Between the compulsory gybes (since it will be impossible to follow a direct course) and what will doubtless be big seas in the Taiwan Strait as a result of the strong current on the nose (up to 2 knots), the run promises to be full-on and wet.
    In a tropical heat, the thermometer displaying 37°C in the middle of the day, with a humidity rate bordering 80%, we prepared Gitana 13 accordingly. All the moveable ‘gear’ (warps, etc…) has found a niche to the extreme aft, at the foot of the rudder stocks, so as to delay the risk of burying the bows as best we can. As we have ‘just’ one big day at sea ahead of us, we’re not going to be forming watches so it’ll be a case of everyone on deck for this trip. This time around, our crew is completed by two French sailors, Pierre and Raphaël, who have both lived in Hong Kong for over 10 years. With a number of years experience sailing on maxis, this reinforcement comes just at the right time as performing gybes at sea and in the breeze remains the most perilous manoeuvre aboard. In order to perform this move in the right conditions, it’ll take at least eight of us aboard.
     
    See you soon
    Nicolas Raynaud