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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

    05.11.2014

    Braking before the tradewinds.

    After setting sail from Saint Malo on Sunday at 1400 hours local time, the seven Ultimes still competing - Sodebo Ultim’ having had to retire following a collision with a cargo ship left Madeira abeam of them last night. The passage around the Portuguese archipelago also marked a change of pace for the fleet, which had been manhandled by two and ha…

    par Gitana

    After setting sail from Saint Malo on Sunday at 1400 hours local time, the seven Ultimes still competing – Sodebo Ultim’ having had to retire following a collision with a cargo ship left Madeira abeam of them last night. The passage around the Portuguese archipelago also marked a change of pace for the fleet, which had been manhandled by two and half days of particularly intense breeze. With the exception of the leader, Banque Populaire VII, which is making the most of its lead and its position further south to stamp her domination, those at the front of the pack in this Route du Rhum Destination Guadeloupe have been negotiating a transition zone this morning, the direct result of which is a clear drop in speed. Fourth at the noon position report, the Multi70 Edmond de Rothschild remains in a solid position in the chasing pack.
    Sébastien Josse achieving 90% of the polars* of a double-handed configuration

    Before setting off from the corsair city, Sébastien Josse admitted that the first three days would be decisive for the rest of the race. Indeed, given the weather conditions forecast, the solo sailor had the following plan in mind: “This race start clearly favours the big boats, particularly on the long starboard tack across the Bay of Biscay, where they’ll be able to lengthen their stride whilst keeping their sails aloft, while aboard our Multi70s, we’ll be more geared towards ‘hunkering down’ rather than attacking. I wouldn’t be surprised if we lament a deficit of a good hundred miles or so as we approach the Azores. However, the next stage doesn’t look as easy with a fairly light tradewind. As such it will be important to preserve the boat over the first few days so as to be able to fully exploit her potential as we head across to the West Indies.”

    However, the skipper of Edmond de Rothschild has done better than that, rounding off the first section of the race in a manner that some of his rivals have described as impressive. Aside from Loïck Peyron, who has led the fleet with panache since the first night and today boasts a lead of over 120 miles in relation to his closest pursuer, Sébastien Josse is in contact with all the large multihulls in his category. It’s a position that Antoine Koch, one of the routers for the Multi70 Edmond de Rothschild, is able to back up with figures: “Since the start, Sébastien has been achieving 90 or even 95% of the polars* recorded in the Transat Jacques Vabre. This is very good as he and Charles (Caudrelier) were particularly quick in that race last year.”

    * Correspond with the boat’s performances according to the strength and angle of the wind

    Transition day

    In the space of 24 hours, the atmosphere and setting has completely changed for the fleet of Ultimes. Late yesterday morning, Sébastien Josse was still referring to stormy skies with winds oscillating between 30 and 40 knots and above all a strong north-westerly swell of 5 metres, which was making life more than a little chaotic for the solo sailors. Last night though, on the approach to Madeira, the seas became more organised and the wind dropped away sharply as it veered; it is now blowing in from the North.

    Antoine Koch gives us his analysis of this transition zone, which the pretenders in this star category are currently having to negotiate: “The Azores High is being attacked by a cold front associated with a big low passing to its north. This phenomenon is tending to undermine the anticyclone and as a result the zone of high pressure is stretching further eastwards than usual and hence is slightly blocking the passage towards the tradewinds.” Forecast to affect the fleet from mid-morning this Wednesday, in the end this zone of light airs began to influence Edmond de Rothschild and her adversaries last night: “Sébastien is in a northerly breeze of around a dozen knots. However, it is fairly unstable in terms of strength and direction. Due to being positioned further south, Banque Populaire will come off a lot better than her pursuers as she will be able to continue to make headway at 25 knots, whilst astern they’ll be making between 10 and 15 knots. As such, aside from the leader, the Ultimes will experience a general reduction in pace throughout the day and especially over the course of the afternoon.”

    The 1200 noon position report reflected the router’s words. Indeed, Banque Populaire VII is continuing to go it alone at 25 knots, whilst in her wake, the instantaneous speeds of her rivals amount to between 11 and 18 knots. The trimaran fitted out by Baron Benjamin de Rothschild is currently lying in fourth place in a chasing pack made up of Francis Joyon and Lionel Lemonchois. Meantime Spindrift 2 is located some forty miles ahead of their bows.

    Major manœuvres

    The transition zone described above and the forecast arrival in the north-easterly tradewinds, which provide downwind conditions enabling a high-speed crossing to the West Indies, mark the start of the major manœuvres. Already, things have been very animated on the decks of the trimarans over the past few hours, as Antoine Koch confirmed: “Since last night, Sébastien has had to constantly adapt his sail area. Yesterday, at the same time, he was sailing under 3 reefs and ORC, whilst right now he is slipping along downwind under full main and gennaker. All these sail changes are long and tiring in solo configuration.”

    And yet, this is only the beginning! Indeed, if we base our estimates on the weather forecasts available to date, the journey to Pointe-à-Pitre won’t be a bed of roses. The disturbed tradewinds revealed in the weather models will call for a great many manœuvres. Such a scenario isn’t an unpleasant prospect for Sébastien Josse and his routing team: “Once in the tradewinds, there will be a lot of work. It’s not going to be a straight line the whole way. The routing software seems to agree that there will be a number of gybes to contend with in order to keep pressure in the sails throughout the negotiation of the Atlantic en route to the West Indies. The fleet is likely to be on a run and in this configuration having a light boat will be an advantage,” concluded the router of the trimaran with five arrows. 

    Ranking on 5 November at 1200 GMT
    1. Banque Populaire VII (Loïck Peyron) – 2,339.2 miles from the goal
    2. Spindrift 2 (Yann Guichard) – 128.6 miles back
    3. Idec Sport (Francis Joyon) – 168.2 miles back
    4. Edmond de Rothschild (Sébastien Josse) – 170.3 miles back
    5. Prince de Bretagne (Lionel Lemonchois) – 190 miles back
    6. Musandam Oman Sail (Sidney Gavignet) – 226.6 miles back
    7. Paprec Recyclage (Yann Elies) – 253.7 miles back

    Abd – Sodebo Ultim’