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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

    09.05.2005

    Cape Finisterre.

    Yesterday afternoon the six trimarans entered in the IB Group Challenge crossed the starting line off Lorient and by this morning (Monday) were already not far off Cape Finisterre. Sailing conditions overnight were excellent. Gitana 11 remains in the leading pack and Gitana X is hanging on. Both are steering a course slightly off to the west hoping…

    par Gitana

    Yesterday afternoon the six trimarans entered in the IB Group Challenge crossed the starting line off Lorient and by this morning (Monday) were already not far off Cape Finisterre. Sailing conditions overnight were excellent. Gitana 11 remains in the leading pack and Gitana X is hanging on. Both are steering a course slightly off to the west hoping to latch onto a shift oinwind direction as they approach Spain.

    25 knots, 28 knots, 30 knots, 33 knots… the speedos are going crazy ! After a start in a moderate westerly breeze, the wind gradually veered east, gaining in strength from 15 to 20 knots. As the fleet closed in on the coast of Spain in the small hours this morning , the Venturi effect increased the wind still further to some 25-30 knots.

    Erwan Le Roux on board Gitana X : « We are off the coast of La Corogne after having spent a great first night flying along with mainsail and gennaker up. After Groix, the wind turned gradually northwards before strengthening and veering east. We have overtaken Michel Desjoyeaux who overtook us afterwards but then we closed in on the fleet leaders. Before nightfall, we saw Franck Cammas hoisting his gennaker. Wind strength is picking up a little as we approach Cape Finisterre and boat speed is not far off thirty knots, in an easterly wind of 25 to 28 knots. We are pleased to be where we are just fifteen miles behind Michel Desjoyeaux who we overtook on Sunday evening. We have opted for a slightly more westerly course than the leaders, which is causing us to lose a little ground with regard to the distance to the finish. But we have made the decision not to hug the coast to be better placed when the wind shifts. AT the start of the afternoon, the wind is forecast to lighten, veering SE. Everything is fine on board. We have three guys up on deck and three off watch. »

    A favourable situation for Thierry Duprey du Vorsent and his crew, who have succeeded in keeping up with the fast pace set by the leaders as soon as the starting shot was fired on Sunday afternoon. Gitana 11 was in an excellent situation before daybreak today. Frédéric Le Peutrec and his crew were progressing at almost 30 knots some 70 miles from Cape Finisterre which they should see very shortly. We haven’t been able to contact the guys on board to have further information. 

    Around midday today, the weather should be changing very rapidly. An albeit sluggish low pressure system is slowly making its way towards the coast of Spain giving rise to southerly winds. Wind speeds are therefore likely to fall off quite perceptibly and the crews will have to start making their first tactical choices. Should they head out to sea a little (30 miles) to try and take advantage of downwind conditions and latch onto the shift west, or should they not take a short cut along the coast where they hope to have easier going seas and a zest of a thermal breeze before the perturbation makes its presence felt. This first transitional phase is and important one as it may give rise to major gaps in the distances between the boats.

    Rankings – Monday 9th May 04h00 (French time) :

    1-Groupama-2 (Franck Cammas)                 2 254 miles to the finish

    2-Banque Populaire (Pascal Bidégorry)           + 8 miles from leader

    3-Gitana 11 (Frédéric Le Peutrec)                                       + 9 miles

    4-Géant (Michel Desjoyeaux)                                            + 12 miles

    5-Gitana X (Thierry Duprey du Vorsent)                           + 25 miles

     6-Foncia (Armel Le Cléac’h)                                             + 37 miles