Heritage

Season 26
Types de médias
  • Photos
  • Vidéos
  • Sons
Années
  • 2026
  • 2024
  • 2023
  • 2022
  • 2021
  • 2020
  • 2019
  • 2018
  • 2017
  • 2016
  • 2015
  • 2014
Afficher les résultats (121)
supprimer tous les filtres
  • News
  • Gallery
  • Gitana 18
  • Team
  • 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

    31.08.2008

    Algoa Bay.

    par Gitana

    Like the Horn, the Cape of Good Hope is worthy of its title; especially in winter and against the prevailing winds and currents. For three days, making headway towards the south-west, we continued on our way with a series of wind shifts generated by the small lows which detach themselves from the African continent at a rapid pace. At times we had a powerful N’ly wind warmed by the sunshine when the front of the small disturbance tied in with the descent of the Indian Ocean tradewind. At other times we had a grey and chilly S’ly wind at the rear of these small phenomena, as they breathe in the humid air of the roaring forties. There are no peaceful watches in these conditions. The manœuvres didn’t stop for three days as we went through our entire sail wardrobe. There’s a bit of moaning when the enormous drenched sails have to be manipulated in lieu of an allotted sleep session. And there’s some real griping when the incessant rotations cause a disorganized sea which rears up and becomes boat breaking. This is particularly true when the 4 to 5 knot Agulhas current comes up against S’ly winds and a 40s swell which is climbing towards Madagascar. At this latitude, the contrasts in this Ocean, which is wide open to the south, are startling at times. Winter or Tradewind? The crew is finding it difficult to find the right garb, whilst the albatross flirt with the massive flying fish which are mashed on the trampoline… Amazing!

    Yesterday evening, as we headed in towards land, 3 miles from the South African coast, the wind and the sea calmed down for a few hours creating a rare silence. Whilst some, those who no longer yell “land”! as in times gone by, but rather “signal”!, leapt onto their mobiles, the rest of the crew got together on deck, savouring the dry, peaceful moment. This was also an opportunity for some final exchanges prior to tackling the storm. Indeed, after a great deal racking our brains along with Lionel and Sylvain, our router, and after spending a long time weighing up the technical and meteorological arguments and swapping experiences, we opted to make towards Algoa Bay off Port Elizabeth in order to endure the very nasty gales forecast. It has to be said that studying this African coast attentively, there aren’t many places to shelter. Save for the bay of Cape Town to the West and that of Maputo to the north, this continent has absolutely no shelter worthy of such a title for over 2,000 kilometres… barring Algoa Bay!
    From here, not only do we think we’ll be sufficiently protected from the sea and the wind in order to remain manœuvrable, but we’re only 300 miles from the Atlantic. A 24 or 36 hour weather window would suffice in order to round the Agulhas Cape and filter along towards the equator. Otherwise, in order to avoid the 10 metre waves modelled by the 50 knot winds and gusts of 65 knots, we would have had to flee northwards and simultaneously postpone our passage around the Cape of Good Hope indefinitely.

    After a final effort of 150 miles and prior to the point where the sea was to become nothing more than an outburst of air and water, we slid along under the cover of darkness with the first 40 knot gust and got downwind of this miraculous protuberance spanning around ten miles. Phew!
    Since this morning, tacking barepoled along the shore, we’ve continued to hug the coast, on pain of being projected ‘outside’ by gusts reaching over 60 knots. There was a record during Pascal’s watch with a peak at 67 knots (125km/hr)! In the squalls, the summit of the waves totally decapitates and pulverises and the water smokes across hundreds of metres. It’s a fabulous spectacle!
    We aren’t alone in appreciating this harbour of relative peace; around ten cargo ships have dropped anchor here along with a few trawlers who are doubtless too far from their base.
    In front of us, in a landscape of moderate mountains surprisingly reminiscent of Tierra del Fuego, the town of Port Elizabeth, bordered by sandy beaches and dunes, stretches for around fifteen kilometres. Less than a mile from our bows are the floodlights from a rugby pitch, chimneys, sheds, blocks of flats, a McDonalds, and surely a few warm bistros!
    Behind the commercial port, around ten surfers are playing in the waves caused by the wind-levelled backwash!

    Just a stone’s throw away, just behind the headland, the sea swells and the wind rages.
    The height of the waves forecast for this evening is 11 metres, ten miles offshore. It’s still a minimum of 24 hours before the waves subside.

    Hidden away in Algoa Bay, we’re doing just fine!

    Dominic Vittet