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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

    12.06.2009

    Start of assembly of the new Gitana 11.

    Since January 2009 Gitana Team’s shore crew has been getting down to the business of transforming Gitana 11. The victorious trimaran in the Route du Rhum 2006 under the colours of the LCF Rothschild Group, has currently been undergoing heavy structural modifications, with the 60 foot multihull soon to become a 75 footer. The ambitious refit, encour…

    par Gitana

    Since January 2009 Gitana Team’s shore crew has been getting down to the business of transforming Gitana 11. The victorious trimaran in the Route du Rhum 2006 under the colours of the LCF Rothschild Group, has currently been undergoing heavy structural modifications, with the 60 foot multihull soon to become a 75 footer. The ambitious refit, encouraged by the new notice of race for the transatlantic dash between St Malo and Pointe-à-Pitre – we recall that the 9th edition will be open to multihulls from the G Class –, could be compared to a giant jigsaw puzzle. Indeed the key elements for the new trimarans are arriving from all around the globe and this week was marked by the receipt of the first float from New Zealand.
    Wide load bound for La Trinité-sur-Mer, Brittany

    Gitana 11’s starboard float, the first to come out of the New Zealand yards, left the Antipodes at the start of May on a delivery trip of around thirty days aboard a cargo ship. Disembarked in Le Havre last Saturday, 6th June, this piece measuring nearly 22 metres long had to wait around in the Norman port for a few days, under strict order of the customs, prior to being transported by truck to La Trinité-sur-Mer. The wide load arrived in front of Gitana Team’s technical base late afternoon on Wednesday. For the team, managed by William Fabulet, the receipt of the first float marks the start of the assembly. It’s an important stage as Yann Guichard, skipper of Gitana 11 explains to us: “It’s been six months that the members of the team devoted to the refit have been preparing the platform. The important work carried out on the cockpit and the helming stations is drawing to a close and, at the same time, the beams have been reinforced to anticipate the increase in the stresses as a result of Gitana 11’s new dimensions. However, the assembly is reaching a crucial phase as we’re finally going to see in the flesh what we’ve only been seeing on paper for several months. The boat will then be reborn and over the next few weeks its new lines will take shape. As regards the float, the team will dedicate its time to positioning it correctly, before tackling the grafting proper. This represents nearly three weeks’ work.”

    Next it will be the turn of the port float, whose arrival in Brittany is scheduled at the end of June, to access the hangar in the technical base in Saint-Philibert. It should be noted that the latter part will take exactly the same route as its ‘elder’.

    Why have the floats built at the other end of the world? Such is the question we asked the team manager of Baron Benjamin de Rothschild’s racing stable: “Following studies, we chose to have Gitana 11’s floats built in New Zealand. Initially this decision was guided by the obvious economic reasons. However, we also wanted to pursue the work initiated with the Southern Ocean Marine yard during the genesis of Gitana Eighty. Finally, this construction thousands of kilometres away allows us to carry quietly on with work away from prying eyes, which is never unpleasant!” explains Cyril Dardashti, before giving us further details about this collaboration: “Rolland Allanic, one of composite specialists with Gitana Team, has thus left France for the Antipodes for nearly a six month spell. His daily presence in the yards has been essential both for supervising the construction and for ensuring the link and project monitoring with the shore crew that remained in France. The result speaks for itself and we’re delighted with it.”

    The receipt of this first key part gave Yann Guichard the opportunity to look in detail at the specific elements of these new floats: “From the outset our main theme has been to make Gitana 11 more versatile. We’re seeking to conserve her potential in the light airs whilst improving her performance in the breeze. This balance stems from the lengthening of the floats, which will be 4 metres longer. The hull forms are inspired by the latest generation of floats, which have arisen from the technical evolutions made in the domain over the past seven years. It should be recalled that Gitana 11’s floats date right back to 2001. As ever, it was a question of the weight/power compromise during the design and then the construction.”

    The work on the lengthening Gitana 11

    – Construction and changing over of the existing floats
    – Lengthening of the central pod
    – Adjustment of the deck layout and optimisation of the platform in view of single-handed sailing

    Gitana 11 in figures prior to work

    LOA: 18.28m
    Beam: 18.10m
    Air draft: 30.48 m
    Water draft: 5.00 m
    Weight: 6.1 tonnes
    Mainsail: 198m²
    Genoa: 120m²
    Gennaker: 265m²
    First launch: August 2001 under the name of Belgacom