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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

    09.05.2006

    Channel Effects.

    At the midday check-in, Gitana 12 and Gitana 11 occupied 2nd and 3rd place respectively. Onboard the six trimarans which set out on the London / Alpes Maritimes race on Monday afternoon amidst a wind of highly variable force and direction, the first night at sea proved rather lively.

    par Gitana

    At the midday check-in, Gitana 12 and Gitana 11 occupied 2nd and 3rd place respectively. Onboard the six trimarans which set out on the London / Alpes Maritimes race on Monday afternoon amidst a wind of highly variable force and direction, the first night at sea proved rather lively.

    On Tuesday morning, the two Gitanas were sailing well within themselves in the middle of the Channel, while trying to take advantage of every variation of a light to moderate westerly breeze.

    The first few hours of racing were marked by damp, cool and lively conditions, with a southerly wind veering south-west, at five, ten, thirteen, then twelve knots … It necessitated a continual presence on deck to trim and change the sails, watch out for cargo vessels, navigate between sandbanks and negotiate the tidal currents… But the two Gitana Team crews couldn’t hide their pleasure at being back on the water and competing on this 2,650-mile course, which promises to be varied to say the least. Already on this Tuesday morning, the fleet of six trimarans had split into two groups after passing Pas de Calais. In a 10-15-knot westerly flow, Groupama 2 and Banque Populaire opted to hug the English coastline, while Géant and the two Gitanas chose to head towards the Normandy beaches, with Sopra Group having already fallen slightly behind.

    But let’s not delude ourselves: as dictated by changes in the wind direction, the boats are more than likely going to meet again in the middle of the morning in the ocean off Le Havre, before heading for the Channel Islands. And in the words of Mayeul Riffet, the Gitana 12 navigator contacted around 09:00: “the difficult bit coming up is around Cherbourg, where a ridge of high pressure is in the process of forming on the Cotentin peninsula and the wind is going to drop. It will be essential to find out quite quickly if we need to cross through this bubble or go around it, because our range of options is limited by the coasts.” Coastal effects, Channel effects, current effects, wind effects… there’s a strong chance that these early hours of the race could have a decisive effect on the extent to which the trimarans are in a northerly position on entry to the Gulf of Gascony the following night. And this in turn will rapidly define each crew’s strategy.

    At the time of the midday radio chat, while Gitana 11 was uncontactable, onboard Gitana 12, the mood was upbeat after this exciting first night: “We’re hyper-satisfied with the boat. It’s making things completely different for us compared with last year. It’s absolutely fantastic to see how all the work done over the winter is enabling us to hold our own with Banque Populaire, Géant and even Gitana 11!”, enthused Mayeul Riffet over the airwaves.

    The night time e-mails…

    Frédéric Guilmin onboard Gitana 11:

    “We knew when we left London that the conditions encountered would be difficult in the sense that the winds would be light and erratic at the start and in our faces after that. And let me assure you, we were not disappointed, so the forecasters got it right this time! As Tuesday morning approaches, we’re impatiently waiting for the positions, because in such conditions, it’s very hard to have an idea of the situation of our fellow competitors. I hope they haven’t gone racing off ahead carried by the wind… In any case, we have done everything to make up the small gap that formed after the Long Sand Head marker buoy, where our speed was in a trough for an hour. At this moment (at 06:45 French time), we are on the starboard tack close-hauled beneath the route, in a 14-knot southwest flow. Everything is going well.”

    Nicolas Raynaud onboard Gitana 12:

    “If it had been ten degrees warmer, I would have definitely been talking to you about a perfect first night. The North Sea in May is still a bit nippy, as we’d already noticed during the delivery to London. But fortunately, we’ve been warmed by the thrill of the race, as Banque Populaire has kept us on our toes all night. In that situation, you almost don’t notice the chill on your face… So with the day dawning on entry to the Channel and Pas de Calais left in our wake, morale onboard is excellent. The exit from the Thames in a 508-knot wind with flying gennakers showed us that we had no reason to envy the others, apart from Groupama 2, which was totally at ease, as usual. Later, as forecast, the wind changed and we’re currently (at 06:45 French time) close-hauled on a flat sea in a 10-12-knot southwester. We keep changing tack, and there’s also a nice ridge of high pressure that we’ll have to cross. To do so, the lad Mama, alias Mayeul Rifflet, has kicked me off the map table, as he has Grib files to process, and whatever we do, we mustn’t upset an artist at work…”

    Gitana 11 crew

    Frédéric Le Peutrec (skipper-helmsman), Baron Benjamin de Rothschild (trimmer), Frédéric Guilmin (navigator), Daniel Souben (helmsman-trimmer), Ronan Le Goff (bowman), Antoine Mermod (pitman-trimmer)

    Gitana 12 crew

    Thierry Duprey du Vorsent (skipper-helmsman), Erwan Le Roux (helmsman-trimmer), Mayeul Riffet (navigator), Alexandre Marmorat (trimmer), Nicolas Raynaud (trimmer), Léopold Lucet (bowman)