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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

    09.07.2012

    Atlantic cavalcades.

    The Krys Ocean Race fleet isn’t dawdling in the North Atlantic. Still sailing on the leading edge of a cold front, which is generating some boisterous south-westerly winds, Edmond de Rothschild Group and her adversaries are continuing their express transatlantic. Having set off from New York a little over 48 hours ago, Sébastien Josse and the crew…

    par Gitana

    The Krys Ocean Race fleet isn’t dawdling in the North Atlantic. Still sailing on the leading edge of a cold front, which is generating some boisterous south-westerly winds, Edmond de Rothschild Group and her adversaries are continuing their express transatlantic. Having set off from New York a little over 48 hours ago, Sébastien Josse and the crew of Edmond de Rothschild Group are keeping pace and were lying in second place at the 1600 UTC standing, whilst Spindrift Racing, positioned further North and hence closer to the direct route, is leading. Of note is the fact that Florent Chastel has racked up a new speed record on the boat: 40.7 knots!

    The MOD 70s in the Krys Ocean Race have already been at sea for some 48 hours. As announced prior to the start in New York, the pace is steady aboard the one-design trimarans and those crews who’ve managed to hook onto the transatlantic express by positioning themselves on the leading edge of a cold front, certainly aren’t lying idle. And although these downwind, boisterous conditions are getting the speedos spinning, they also call for the utmost concentration from the helmsmen and trimmer, who haven’t spared any effort since the first few hours at sea. Aboard, referring to the atmosphere as wet would be a gentle euphemism: “It was a lively and pretty windy night. We had up to 30-35 knots with a fair number of squalls and a cross swell, which didn’t facilitate the steering. We reduced the sail area and we are sailing under two reefs and solent at 140-150° from the true wind. Such angles are slightly more open, which is enabling us to manage the speed and gradually slip along towards the North-East. We’re maintaining an average of 28 knots and it’s more ‘bearable’ than last night’s 30-35 knots. At the helm, you have to constantly adapt so as not to put too much pressure on the boat. As such, with this upcoming ‘light patch’, it will be easier to negotiate the waves,” admitted Sébastien Josse at the noon radio link-up.

    Indeed the wind should become less intense over the coming hours as the Azores High is climbing northwards. At the same time, this south-westerly breeze will veer and form an established westerly. With this rotation, the fleet of MOD 70s will have to negotiate a gybe and change tack for the first time since leaving New York. This manoeuvre and the moment chosen to launch into it will be strategic and certainly decisive for the next stage of events: “The breeze is set to calm a little midway through the afternoon or early tonight, but there will still be 25 knots of breeze and 2.5-metre waves…” announced the skipper of Edmond de Rothschild Group.

    After the damaged daggerboard on Race For Water over the opening hours of the race, it’s the port foil on Musandam – Oman Sail, which gave up the ghost last night. Handicapped in terms of speed without this appendage, the skipper of the Omani trimaran explained that they’ll be able to make Brest without an issue, but they’ll have to ease off the pace to achieve that and only drive the boat at 70% of her potential. It’s a tough blow for Sidney Gavignet and his men, who’d got off to a very fine start in this race. These two issues with damage come as a timely reminder, if need be, that sailing is a mechanical sport, and that at the current speeds the MOD 70s are making, concentration and vigilance are unquestionably the watchwords aboard.

    Message from Antoine Koc h received on Monday 9 July

    “All’s well aboard Edmond de Rothschild Group, though it’s very complicated, impossible even, to type on the keyboard!! Life is even more complicated inside the boat than on deck. It’s just as wet, but as you can’t see the waves coming, when the boat nosedives – which happens about once an hour – you fall flat on your face down below… Moving about the boat is a long and difficult process… Aside from that, this express transatlantic is living up to expectations and the speedo only rarely dips below 30 knots. Florent has improved on the boat’s speed record: 40.7 knots… Until tomorrow, Antoine Koch.”

    A cartography is available on the Gitana Team website.

    The positions are updated every three hours with standing at 00h, 03h, 06h, 09h, 12h, 15h, 18h and 21h French time (UTC+2)

    The crew of Edmond de Rothschild Group

    Sébastien Josse (skipper, helmsman)

    Antoine Koch (navigator – helmsman)

    Christophe Espagnon (trimmer – helmsman)

    David Boileau (trimmer – helmsman)

    Thomas Rouxel (trimmer – helmsman)

    Florent Chastel (bowman)

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