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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

    07.11.2005

    A busy night out.

    A lively first night out at sea for both Gitana – no time to kill since leaving Le Havre at 15h00 on Sunday is a frisky S/SW 25 knot breeze. Several boats have suffered technical hitches of varying degrees. Gitana 11 has de-routed to Camaret to change a mainsheet.

    par Gitana

    A lively first night out at sea for both Gitana – no time to kill since leaving Le Havre at 15h00 on Sunday is a frisky S/SW 25 knot breeze. Several boats have suffered technical hitches of varying degrees. Gitana 11 has de-routed to Camaret to change a mainsheet.

    After a fast stretch over to the Cotentin peninsula (Normandy), both trimarans spent the night tacking upwind and manoeuvring as the squalls came over. By the small hours of the morning, the fleet was close to the coast of Brittany facing a wind veering west. No choice but to get into the race from the word go ! No sooner had the starting shot been fired off the cliffs of Sainte Adresse, than the Orma multis found themselves sprinting off west at more than 30 knots towards Barfleur, then the Raz Blanchard. Luckily, the waves kicked up by the change in tide were not that bad after all. Then came the time to choose the exit route out of the Channel. Thierry Duprey du Vorsent and Erwan Le Roux (Gitana X) opted to tack through the Channel Islands exploiting the wind shifts and the ebbing tide. Frédéric Le Peutrec and Yann Guichard  (Gitana 11) preferred to pass on the inside, leaving Guernsey to port before making for Breton coastline.

    By 11h00 on Monday morning, Gitana 11 was making way to Camaret via the Four Channel between Ushant and Le Conquet. Frédéric Le Peutrec and Yann Guichard had to sort out a problem with a mainsheet. This pitstop should not last more than an hour which will not have any effect on their race. For Gitana X, the start of this transatlantic race is rather promising as Thierry Duprey du Vorsent and Erwan Le Roux are keeping up with the leaders on a southbound course in the Four Channel to get into the Bay of Biscay as soon as they can. Two other trimarans have suffered damage. Brossard has had to retire due to major damage of the central hull on a level with the mast step. She is heading towards the coast of England at reduced speed. Sodebo has broken her main halyard, forcing her to call in at Cherbourg for three hours.

    Monday is likely to be a little easier before a new front arrives on the scene. A cold front associated with a very stiff low. Winds should shift from a 15 knot westerly blow to a 20 knot southerly by the end of the afternoon, veering again violently to a south westerly in excess of 40 knots around midnight.  The gradual increase and shift mark the arrival of strong winds in the Bay of Biscay. This particular cold front will give rise to very active squalls and a sharp rotation in wind direction from SW to NW. Precisely the type of conditions multihulls detest – chaotic seas, pyramid waves, cross seas and stiff winds. After picking their way through SW winds with two or three reefs in the main and a small jib upfront, the teams will have to change canvas as they pass Cape Finisterre which is very dangerous indeed – shipping, fishing boats, coastal effects, the swell being compressed over the continental shelf. Conditions are rife for a highly changeable scene at the start of this Jacques Vabre Transat…


    60 ft Multihull Rankings – 9h44 (French time) :

    1.     Orange Project 
    2.     Groupama 2 
    3.     Géant 
    4.     Banque
    5.     Gitana 11
    6.    Gitana X 
    7.    TIM Progetto Italia 
    8.    Brossard 
    9.    Sodebo