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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

    24.10.2015

    The calm before the storm.

    For several days, the forty-two duos competing in the Transat Jacques Vabre have been glued to the grib files. With 24 hours until the start which, subject to last minute changes, will set sail tomorrow, Sunday 25 October at 12:30 GMT, the forecasts are becoming more refined and have finally revealed the scenario for the first few days of racing in…

    par Gitana

    For several days, the forty-two duos competing in the Transat Jacques Vabre have been glued to the grib files. With 24 hours until the start which, subject to last minute changes, will set sail tomorrow, Sunday 25 October at 12:30 GMT, the forecasts are becoming more refined and have finally revealed the scenario for the first few days of racing in this 2015 edition. After a gentle introduction and what promises to be an express exit from the English Channel, things are set to get complicated in the Bay of Biscay with the negotiation of a deep depression that will pick up a violent sea. Aboard the Mono60 Edmond de Rothschild, Sébastien Josse and Charles Caudrelier are ready for this debut performance, which is certainly going to be a baptism of fire.

    The perfect 24 hours to open proceedings

    “We couldn’t have hoped for a better start for our new boats in terms of the wind direction,” Sébastien Josse beams. After the first few hours of racing, which are likely to be played out in ‘piano’ mode with virtually no wind (4 to 6 knots) during kick-off, a south-easterly breeze will freshen as it clocks round to the south, to become decidedly meatier off Raz Blanchard. In these conditions, the Edmond de Rothschild duo will be making headway beam onto the wind and then, as they bear away a little more, they’ll be able to pick up the pace. At that point, in line with just four other competitors with foils, they’ll be able let their lifting surfaces do the talking. In this way, the 220 miles, which separate Le Havre from the English Channel are likely to be devoured at speed and the leaders in the Imoca class may well be able to make their entrance into the Bay of Biscay from the early hours of Monday morning. “Things will crescendo then and the wind will start to back as it builds throughout our exit from the English Channel. Today, if the current routing pans out that will give us a fantastic trajectory with speeds set to border on 18 – 22 knots so it’ll be quick! This first phase is clearly geared up for our boats,” explains the skipper of Edmond de Rothschild.

    Though the exit from the English Channel promises to be just right for Sébastien Josse and Charles Caudrelier to calmly find their feet in this race, they will have to quickly get into the swing of things aboard the most recent of the Gitana fleet as the next stage of the game promises to be a lot more tricky. Indeed, the duo will have to negotiate a low at the entrance to the Bay of Biscay and the atmosphere will be transformed on the deck of the Mono60 Edmond de Rothschild.

    A boat-breaking sea in the Bay

    You could see the concerned looks on the faces of the skippers at this morning’s start briefing. The reasoning behind this is that after the first few hours of calm conditions, the twenty monohulls competing in the Imoca class will have to deal with the first storm of the race. “Given the line-up, if we are to win this race then we’ll have to go where it hurts. In these conditions, there’s a risky element where we won’t be able to control everything and that’s not a configuration that appeals to us. The weather conditions forecast 36 hours after the start are very bad for the boats. Overnight on Monday through into Tuesday, we’re going to traverse a low. Prior to this low, there will be a southerly wind, whilst afterwards it will punch in from the North. This change will kick in so quickly that the seas won’t have the time to organise themselves. What that means is that we’ll hold onto a very heavy southerly sea of 7 to 8 metres, which will be transformed into cross seas with a northerly sea, which will arrive with the new wind. It’s not the wind that is of concern to us; it’s really the sea. The grib files are predicting 7 to 8-metre waves, so we know that in practice that can equate to more than 10 metres. We don’t have many solutions to counter that other than to hunker down or go on the run. At that point, we switch to another mode, neglecting the race to some extent! The game plan will involve not damaging the boat…”

    Indeed, with a freshly launched boat, the watchword aboard the Mono60 Edmond de Rothschild is sure to be safety: “We’re competitors but faced with conditions such as these, you have to focus on good seamanship, both in terms of the sailors and the machine, and know how to hunker down and if necessary let the worst of the seas roll through. The Transat Jacques Vabre is a long race spanning some 5,400 miles and we need the boat to be in perfect working order to make Itajai” Sébastien Josse points out.