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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

    06.11.2013

    The weather window is confirmed: grouped start tomorrow at 1300 hours!.

    The Transat Jacques Vabre will leave Le Havre tomorrow, Thursday, at 1300 hours local time. Following the delayed start for the Class 40s, the IMOCAs and the Multi50s, all the competitors will finally set sail with the two 70’ trimarans: Edmond de Rothschild (Josse-Caudrelier) and Oman Air-Musandam (Gavignet-Foxall). The duo on the boat fitted out…

    par Gitana

    The Transat Jacques Vabre will leave Le Havre tomorrow, Thursday, at 1300 hours local time. Following the delayed start for the Class 40s, the IMOCAs and the Multi50s, all the competitors will finally set sail with the two 70’ trimarans: Edmond de Rothschild (Josse-Caudrelier) and Oman Air-Musandam (Gavignet-Foxall). The duo on the boat fitted out by Baron Benjamin de Rothschild is very keen to get going on this sprint from the North to the South Atlantic, especially as the weather is promising a rather tactical first leg through the English Channel before linking onto a fine drag race across the Bay of Biscay.

    “We have a favourable weather window to leave on Thursday,” explains the skipper Sébastien Josse. “We’ll have 15 to 20 knots of headwinds to negotiate our way out of the Channel. We’ll have to put in some solid tacks in heavy seas and current to make Ushant (Friday morning) in the best possible position. The wind is then set to build so we’ll have a series of sail changes to perform, the idea still being to sail the tightest possible trajectory as each mile in the wrong direction will cost dearly aboard a multihull. As such the start of this transatlantic race promises to be both tactical and physical right from the off. It’s going to be a thrilling ride and Charles and I are keen to get going.”

    Bunched start

    Edmond de Rothschild will leave the dock in the Bassin Paul Vatine at 1054 hours local time, before making for the race zone. Two crew will initially be aboard the trimaran with the Josse-Caudrelier duo so as to hoist the sails and ensure the manœuvres are performed in complete safety prior to kick-off. The mile-long start line will be set between Le Havre and Sainte-Adresse. A cold front is due to roll through in the morning leaving in its wake a variable breeze, which is likely to settle into a westerly position over the ensuing hours. “Even though there are 44 boats at the start, ourselves and ‘Oman’ will set off from the northern end of the start line with the current,” explains the skipper. “If the wind is well established we should quickly be able to get ahead of the rest of the fleet.”

    A new depression

    Of note is the fact that Race Management are alluding to the possibility of a safe haven pit-stop for the Class 40s and the Multi50s in Roscoff, due to another gale offshore of Brittany. The Multi70s should already be clear of that zone beforehand, though conditions are likely to be boisterous: “We’re going to traverse the Bay of Biscay on what will be a direct route towards Cape Finisterre in principle,” Charles tells us. “It will be the first real test of our piloting skills in cross seas with 4 to 5 metre waves and the conditions may well throw up some considerable differences in speed between the boats.”

    Haircuts, zipped-up bags and a high-protein dinner!

    Given the amount of time they’ve been lining up for race starts, the sailors have got into certain habits before casting off. “I systematically go to the barber’s,” Sébastien reveals. “There’s nothing better than having short hair at sea, both under a hat and under the tropics.” There’s some good cohesion going on with the crew too as Charles succeeded the skipper this morning with a set of clippers.

    “I have various clothing, hats, balaclavas, gloves and other gear I like to have with me at sea and on the evening before the off, I prepare my bag with a thought for the start and the weather in the initial hours of racing,” explains the co-skipper. For Sébastien, the most important thing is that everything has its rightful place aboard the day before. “I have my head torch within arms reach and the spoon is in position with the first soup for the evening, that’s the only details which haven’t been seen to yet. You have to be able to take your mind away from the equipment so you can concentrate solely on getting the boat making headway and the race.”

    For the final evening, the crew will get together for a good steak after a weather briefing with their routers Jean-Yves Bernot and Antoine Koch (view the article “a pair of experts” by clicking here). Like downhill skiers or racing car drivers, the idea is to visualise the circuit beforehand, the English Channel in this case, with all its bends and the tricky sections that will need negotiating.