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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

    22.02.2008

    Lack of wind.

    This climb towards San Francisco is proving to be very difficult… Sailing abeam of the coast of Central America this Friday morning (Costa Rica, Nicaragua), the maxi-cataraman equipped by Baron Benjamin de Rothschild is hobbling along to its final destination, still some 1,880 miles away. The reason for this, as stated by the skipper of Gitana 13 y…

    par Gitana

    This climb towards San Francisco is proving to be very difficult… Sailing abeam of the coast of Central America this Friday morning (Costa Rica, Nicaragua), the maxi-cataraman equipped by Baron Benjamin de Rothschild is hobbling along to its final destination, still some 1,880 miles away. The reason for this, as stated by the skipper of Gitana 13 yesterday, is that the final stretch of this Route de l’Or course isn’t shaping up to be very favourable: this is a result of both the point of sail, which the prevailing NNE’ly winds are imposing on them and the lack of ‘pressure’ announced on the various grib files.

    The Doldrums in their wake, Lionel Lemonchois and his nine crew are now attacking a tough transition zone. The men of Gitana Team have had to battle relentlessly in light airs in order to force their way through to the NW. Conditions seldom allowed average speeds in excess of 7 knots for over five hours last night; a “torment” for both the maxi-catamaran and the crew, as Lionel Lemonchois remarked: “These light airs are always hard on the nerves as they require constant attention. We are trying to benefit from the whole sail area – full mainsail and large gennaker – in order to make the most of the slightest flurry of wind. During the day the sun is unbearable and we take shelter as soon as we can in the hulls of Gitana 13. The miles we’ve covered since the equator will certainly not be remembered as being the most pleasant of this record but we’re putting up with it… Each mile made towards San Francisco doesn’t have to be sailed again!”

    In the next few miles, the tactics for the men on Gitana 13 will consist of distancing themselves from the coast by getting some westing into their trajectory. This separation should enable Lionel Lemonchois and his nine crew to sail in a steadier air flow within the next 48 hours. Indeed, according to the wind files, the NE’ly tradewinds seem to be filling in – from 5 to 7 knots better – to the West of the maxi-catamaran’s current course: “We’re expecting a small right hand rotation to get some westing into our trajectory and join up with some steadier winds. Once we’ve hit this air flow, the wind will gradually back to the NE again” explained the skipper of Gitana 13 before concluding: “The outcome of our course is still hanging in the balance and with the low efficiency of late we have already become a little delayed as regards our timing. Unfortunately though, one thing for sure is that we’ve got some long hours of close-hauled sailing ahead of us.”