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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

    21.11.2002

    Mast problems. It’s lonely at the top ….

    The mast is assuredly one of the sailboat's vital organs, and that's why it is so carefully checked... Of course, one may have in mind the long list of dismasted trimarans which marked the 2002 season, but without going as far as these extreme cases, other problems can occur in the rig, forcing the sailors to perform some dangerous climbing. A tric…

    par Gitana

    The mast is assuredly one of the sailboat’s vital organs, and that’s why it is so carefully checked… Of course, one may have in mind the long list of dismasted trimarans which marked the 2002 season, but without going as far as these extreme cases, other problems can occur in the rig, forcing the sailors to perform some dangerous climbing. A tricky situation when sailing solo, which nevertheless happens often, as we’ve just seen on Banque Populaire a few days ago : Lalou Roucayrol had to get up there in order to set his mainsail free. François Denis, rig specialist for the Gitana Team, comments on these problems and talks about Gitana X’s mast breakage.

    A stuck halyard (rope used to hoist the sails), a mainsail stuck halfway up the mast, a gennaker (large jib) which does not want to come down… Many problems can occur above deck level, forcing the sailors to climb up the spar : not being able to control the sail plan comes down to driving a car which power is not manageable. If the wind freshens, one has to reduce sails quickly : on the contrary, encountering light airs after a squall means that the boat will need more power, i.e. more sail surface. When racing, the sail plan has to be dealt with quite quickly – that’s why sailors do not hesitate to climb up the mast as soon as a problem occurs. “But one has to realise that it’s very shaky up there, says François Denis, and even in the harbour, when someone walks across the net, the guy who’s working on the mast is subject to the boat movements, amplified by the height”. It’s easy to imagine how hard it must be in rough sea conditions, with the automatic pilot ! Certain skippers even wear a crash helmet to climb up their mast, in order to prevent knocking their head.

    Controlling the damage

    “Usually, adds François Denis, the solo sailor has a ‘man halyard’ and some mountaineering gear to get up there (some 30 metres above sea level). In Lionel’s case, when Gitana X’s mast broke 7 metres below the mast head, he could not use that solution, since the halyards were stuck. The main sail was hoisted up to the second reef point, and he could not lower it”. A quite uncomfortable situation, especially when the weather is getting bad and the navigator does not have the possibility to adopt a low profile by reducing sails ! “Lionel handled that very well, getting the broken part of the mast down very smoothly, and that’s why it did not cause any damage to the structure. If the broken part had fallen suddenly, it would probably have perforated the float or the crossbeams – since the mast portion has sharp angles and metallic edges”. We’ve seen this happen to Loick Peyron’s Fujifilm, when the mast made a hole in the port float when it fell.
    Brought back without any further damage to La Trinité-sur-Mer, Gitana X has not suffered much apart from her mast damage, thanks to Lionel who perfectly managed the situation. But now the trimaran needs a new spar – a job that’s already well under way : “the engineer in charge of structure calculation is coming to the yard this afternoon”, explains François Denis.

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