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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

    09.09.2008

    Gybe towards the equator imminent.

    After 26 days at sea, Gitana 13 has covered over 8,700 miles and still has 4,200 miles to cover this Tuesday morning to reach the Elizabeth II Bridge at the entrance to the River Thames and the end of its Tea Route voyage. Still making headway to the west in the tradewinds of the southern hemisphere, Lionel Lemonchois and his men will gybe towards…

    par Gitana

    After 26 days at sea, Gitana 13 has covered over 8,700 miles and still has 4,200 miles to cover this Tuesday morning to reach the Elizabeth II Bridge at the entrance to the River Thames and the end of its Tea Route voyage. Still making headway to the west in the tradewinds of the southern hemisphere, Lionel Lemonchois and his men will gybe towards the equator and the infamous Doldrums during the course of the day.

    “We’ve had some wind again since yesterday afternoon. There is a steady tradewind kicking out 20 to 25 knots of breeze, which is enabling the helmsmen to benefit from some great sessions to slip along in. We are virtually in the middle of the Atlantic, a long way from everything…” confided Dominic Vittet, prior to drawing up Gitana 13’s ‘plan of attack’ for the next few days: “Our northward gybe isn’t far off now. It’s an important moment in terms of strategy and that’s why we’re constantly refining our timing with Sylvain Mondon onshore and Lionel.”

    Indeed, the crew of the maxi-catamaran equipped by Baron Benjamin de Rothschild, will benefit from a rather unusual situation in which to cross the equator and above all the Doldrums a little further north: “By gybing (change of tack to a downwind point of sail) today, the objective is to climb due northwards, on starboard tack, and benefit as much as they can from the African monsoon (SW’ly winds) to cross the Doldrums to its east. This opportunity will enable them to ‘cut the corner’ and gain some precious miles along the course” enthused the onboard navigator.

    Sylvain Mondon sheds some light on this rather atypical scenario, which looks to be a great opportunity for Lionel Lemonchois and his nine man crew: “The Doldrums or the Inter-Tropical Convergence Zone is caused by the opposition of the tradewinds in the northern hemisphere (NE’ly sector) and those in the southern hemisphere (SE’ly sector). This zone is synonymous with shifty winds, with conditions alternating between calms and violent squalls. In a standard situation, the Doldrums stretch further eastwards and very often as a result it is very difficult to traverse the zone near the African coast. Sometimes though a monsoon airflow, which generates SW’ly winds, can form and upset the original scenario. You can observe this phenomenon when the African continent warms up sufficiently to create a thermal low that diverts the SE’ly tradewinds from the southern hemisphere. And this is exactly what is happening at the moment off the coast of Guinea, Sierra Leone and also the Ivory Coast.”

    According to the latest forecasts there is still a chance for the maxi-catamaran in the colours of the LCF Rothschild Group to return to the northern hemisphere during the course of the day on Thursday 11th September.

    A few figures
    Gitana 13 left Hong Kong on Thursday 14th August at 07h55’32” (UT)
    Tuesday 9th September at 0745 UT, Gitana 13 was sailing at 14°06.67 S / 00°27.42 E

    Watch No1: Lionel Lemonchois (Skipper / watch leader / helmsman) / Olivier Wroczynski (trimmer /head of computers and power)  / David Boileau (Bowman /  head of deck fittings)

    Watch No.2: Ludovic Aglaor (watch leader / helmsman) / Laurent Mermod (trimmer) / Ronan Le Goff (Bowman)

    Watch No.3: Pascal Blouin (Watch leader / helmsman) / Ronan Guérin (trimmer) / Léopold Lucet (No.1, head of supplies and doctor)

    Outside the watch system: Dominic Vittet (navigator)