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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

    20.04.2004

    Marc Guillemot and Gitana X qualified for The Transat.

    At 11:30pm in the middle of the night on Saturday, Gitana X arrived back in La Trinité sur Mer, after having spent one and a half days at sea. Sixty hours during which Marc Guillemot completed his compulsory solo qualifying passage, allowing him to line up at the start of The Transat, on May 31rst.

    par Gitana

    At 11:30pm in the middle of the night on Saturday, Gitana X arrived back in La Trinité sur Mer, after having spent one and a half days at sea. Sixty hours during which Marc Guillemot completed his compulsory solo qualifying passage, allowing him to line up at the start of The Transat, on May 31rst.

    Marc likes heavy weather sailing. The last 24 hours of his 1000 mile long passage went way beyond his highest hopes! «I left La Trinité around lunch time on Thursday, four hours later that I’d planned to. The weather system was in the process of changing and although I set out in good conditions, I knew that the situation would worsen a great deal towards the end.» As it turned out, by Friday evening, weather forecasts were alarming. Marc was a few hours ahead of a threatening front lying north-south between Ushant and Cape Finistère. A few hours later, a strong swell began to form and the wind caught up with him around the Glénans archipelago and the island of Groix. He lowered his sails. He still had 200 miles to cover, but the alternative was clear. Keep going and risk finding himself in a critical situation or obtain the permission to shorten his course. Marc called René Boulaire at the UNCL, the organisation which monitors the qualifying passages, and obtained the go-ahead to make way for La Trinité and obtain the validation of his qualification.

    Throughout the 60 hours spent in the Bay of Biscay between Belle-île, Cape Finistère and the island of Sein, Marc met with a whole range of weather conditions, giving him the opportunity to put the 2004 version of Gitana X to the test under various points of sail. South-easterly breezes to start with, followed by winds from the south, then north-west, dead calm, gusts of up to 35 knots, downwind, reaching, close-reaching, shortening sail, ballast, Marc went through a whole range of situations which might arise on a transatlantic. A really useful sail which helps Gitana X’s new skipper start finding his bearings on this trimaran.

    « I’m getting to know the boat. Although Gitana X still doesn’t perform very well in light air, she really bucks up when the wind picks up, particularly downwind. The new platform with the winglets on the central rudder and the new curved foils central change her performance and balance substantially. Pitching has reduced incredibly as a result of the new appendages. »

    After a well-deserved rest following the « very positive » familiarisation session with Gitana X, Marc can get down to devoting his time preparing for the Grand Prix de La Trinité safe in the knowledge that his qualification for The Transat is in the bag. Time to work on the minor adjustments he made a note of during his qualifying passage. « Not that much at all in fact. The shore team have done a great job. »