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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

    18.05.2008

    The first storm.

    Setting out from Plymouth just a week ago, the fleet of Imoca monohulls now comprises eleven sailors in The Artemis Transat 2008. After Michel Desjoyeaux on Thursday, it was the turn of Sébastien Josse to turn back yesterday following technical issues. This withdrawal has enabled Vincent Riou to take the controls, closely tailed by Loïck Peyron, ar…

    par Gitana

    Setting out from Plymouth just a week ago, the fleet of Imoca monohulls now comprises eleven sailors in The Artemis Transat 2008. After Michel Desjoyeaux on Thursday, it was the turn of Sébastien Josse to turn back yesterday following technical issues. This withdrawal has enabled Vincent Riou to take the controls, closely tailed by Loïck Peyron, around twenty miles astern. At 1400 UT, Gitana Eighty was positioned 1,341 miles from Boston.

    We were expecting some tactical choices during the position black-out, set by the race organisation between 1800 hours on Friday and 0600 hours UT this morning, however the biggest surprise sadly came in the second retirement from the event… The first position report of this Sunday 18th May has led to a new hierarchy in The Artemis Transat 2008, and after 36 hours without news from the fleet, the leading trio is now comprised of Vincent Riou, Loïck Peyron and Armel Le Cléac’h. Sébastien Josse, previously at the top of the ranking for several day, was in fact forced to turn back late afternoon on Saturday – just as Michel Desjoyeaux did last Thursday – the most recent retirement due to damage to the mast track.

    However, it should be noted that the skipper of Gitana Eighty did benefit from the black-out to give his friends the slip and reposition himself a little deeper south. Loïck Peyron commented on his choice this afternoon: “By repositioning myself in the south, I didn’t make any particular gains in terms of miles to the leader, however these anticipated changes in tack enabled me to sail in a steadier breeze. I didn’t have to make any sail changes throughout this period.” This energy saving is not to be ignored given the forecast for windy, shifty conditions for the solo sailors over the next few days.

    Indeed, between now and this evening, the rhythm will radically change with the arrival of the first large disturbance in this transatlantic. In fact, an initial front will sweep across the head of the Imoca fleet during this evening, the wind files indicating 30-35 knots: “The wind will build and we’ll weather our first storm since the start. We’ll have to perform a change of tack within that system, so as we can head towards the ice gate close-hauled on starboard tack. This passage won’t be easy as we’ll certainly have to negotiate it during a zone of transition, where the wind will ease temporarily!”

    The end of the race promises to be windy, as well as playing host to a number of transitions. The succession of disturbances, broken by zones of light conditions, will force Loïck Peyron and his rivals to constantly have an eye on their trimming and not be sparing with their efforts on deck in order to make Boston.

    The battle for first place is still far from over then!

    Ranking on 18th May at the 1400 UT ranking
    1. PRB (Vincent Riou) 1,314 miles from the finish
    2. Gitana Eighty (Loïck Peyron) 26.4 miles from the leader
    3. Brit Air (Armel Le Cléac’h) 62.8 miles back
    4. Generali (Yann Eliès) 82.9 miles back
    5. Safran (Marc Guillemot) 252.1 miles back