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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

    10.03.2005

    Gitana X comes out of her winter refit.

    After five months snuggly under wraps up in the Gitana Team shed in Saint Philibert, Gitana X came back into contact with her favourite element on Monday 7th March. At the end of the morning she was relaunched and her mast restepped. The first sessions to validate the work carried out during the winter will get underway next week.

    par Gitana

    After five months snuggly under wraps up in the Gitana Team shed in Saint Philibert, Gitana X came back into contact with her favourite element on Monday 7th March. At the end of the morning she was relaunched and her mast restepped. The first sessions to validate the work carried out during the winter will get underway next week.

    Gitana X turned turtle in the Fécamp Grand Prix last September. Two specific yard sessions were required. The first one essentially involved repairing the forward starboard crossbeam which had been dented by the mast as poor weather made it impossible to right the trimaran straight away. The platform itself had not sustained any major damage but all of her electricity, electronics and computers needed to be redone. Headed up by Thierry Duprey, the technical team also made one or two improvements to the boat’s circuits and changed some of the interior layout. All of the coatings were stripped down to the first skin of carbon and one single layer of paint has been applied. Chart table, galley, bunk and batteries have been centralised and made lighter. Furthermore, the central hull’s forward compartment used to be accessed via the deck. The hatch has been done away with and the interior bulkheads have had holes added to them to facilitate moving weight about in race conditions. By way of precaution, the engine has also been changed and all of the electrical and electronic circuits are new, have been made more straightforward, more efficient and lighter.
    As for the deck, the helm stations have been reduced (-30 kg), coatings behind the crossbeams and the mainsheet traveller have gone, the external transmission steering system has been simplified and a coffee grinder pedestal has been removed from the cockpit. All in all, a saving in weight of around 250 kg ! To optimise the boat, the rudders on the floaters have been moved forward to just behind the cross beam (shifted 3 metres) to reduce the negative effects caused by the banana shaped floaters. The central rudder now has a new hydraulic system to modify the angle of attack of the foil design which modulates the trimaran’s longitudinal trim. The mast has also been replaced by a small chord monolithic section (600 mm) and a new set of sails has been made by Incidences La Rochelle.
    Manoeuvres are easier and faster now that the hydraulics pedestal has gone. Thierry Duprey’s team has added a winch onto the mast for the halyards (mainsail, gennaker, staysail) ad the old winch in the cockpit is now used for the textile mainsheet. The crew will therefore be further forward and able to play on the hydraulics with four winchers (in stead of two previously).

    Young crew

    Thierry Duprey has planned a week long Grand Prix configuration training session, followed by a two-handed qualifying passage in April with Erwan Le Roux for the Transat Jacques Vabre. « When we decided to race Gitana X this seaosn, the aim was not to win on the ORMA circuit as that is not in keeping wit the boat’s potential. The idea is to give young talent the chance to get ocean-racing multihull experience. Almost all of the crew is between 20 and 30 years old with the exception of Xavier Dagault, an experienced winch man and former crew for Loïck Peyon, Marc Guillemot and Fred Le Peutrec… Erwan Le Roux (tactics) was formerly bowman on Gitana X , Alex Marmorat (winch man), Antoine Carpentier (foredeck) and Jacques Guichard (trimmer) were also present on board in 2004. The following will be joining us : Mayeul Riffet (pit), formerly on Banque Populaire and Sopra Group, Caroline Vieille (trimmer) only female crew on the ORMA 2005 circuit and Mathieu Tatibouët (mainsheet traveller) who’s been sailing Open 7.50’s for years. Also Léopold Lucet (foredeck hand), part of Gitana Team’s shore crew last year and Yann Le Govic (mainsail trimmer) who is just getting to know mulithulls but who has already done lots of sailing. Taking the boat’s potential and our lack of experience against such a high-profile field into account, our aim is to make regular progress in Grand Prix racing but also to take a shot for the top three places in the two ocean races on the calendar, particularly for the Transat Jacques Vabre. »