Please select your home edition

America's Cup: Emirates Team NZ close up - Day 3

by Richard Gladwell Sail-World NZ 18 Sep 23:24 PDT 19 September 2019
Emirates Team New Zealand foiling under a fast tow in light winds on the Waitemata Harbour - September 19. © Richard Gladwell

With multi-directional, light winds prevailing on the Waitemata Harbour, and Hauraki Gulf, Emirates Team New Zealand were unable to sail their AC75 on its third day on the water after launching.

The silver lining in this particular cloud, was that the AC75 was slow moving, particularly as she near-drifted down the Waitemata Harbour offering plenty of opportunity for those with a long lens, in their photography kit, to check out the AC75's rig and other features.

As with the first two days, there were issues again with the head of the mainsail, however close up shots revealed that this is quite a complex piece of kit, coming square off the very top of the D-Section mast and supporting two mainsail skins.

Today the mainsail was at the very top of the mast, not short of full hoist as it was on Day 1, and the crew member's stay almost 30 metres above the Waitemata, today was less than half that of yesterday - so maybe progress is being made.

One of the points of interest today was Te Aihe's deck sweeper mainsail and how her mainsail support strut and mainsheet system actually works.

Close up shots of the boom end show a support strut poking out of the clew end of the double skinned mainsail, which sweeps the cockpit deck at its after end.

The loose footed sail is slightly above the support strut for much of its length, with the clew controlled with hydraulics, including a hydraulic ram effectively acting as a mainsheet and providing vertical tension on the leech. The ram locks into a slider on a track, but it is not clear how the angle of the mainsail is controlled.

In several of the beam-on shots the efficiency of the deck sweeper main and jib can be seen as they sit tight on deck with little opportunity for turbulent air to flow under the sails disrupting airflows, sail efficiency, and ultimately power.

A significant feature of the AC75 class is the size of the foretriangle - needed to set the big Code Zero and Working jib. While the ratio between the tack of the jib and mast, to the mast and transom is reasonably conventional proportions, when the distance from the mast to the tip of the bowsprit (tack of Code Zero) is taken into account the distance is almost 60% of the AC75's length.

One of the features of the AC75 class is their ability to be towed, on their foils at relatively high speed, making a spectacular sight, particularly with all sails set. For the America's Cup racing the transition between Courses A (off Takapuna), Course C (off North Head) and Course B in the Rangitoto Channel (between A and C) should be very fast.

Related Articles

America's Cup: Four AC75's compared
After 18 months of heavy secrecy shrouding anything to do with the AC75s the wraps are now off After 18 months of heavy secrecy shrouding anything to do with the AC75s, the 75 foot foiling monohull is quickly becoming an open affair with two new boats unveiled last week less than 48 hours apart. Posted on 12 Oct
America's Cup: Emirates Team turns in a good run
After the first testing day since blowing the tack on her Code Zero, Te Aihe finished in a flourish Emirates Team New Zealand was out on the Hauraki Gulf again Saturday, her first sail after blowing up the Code Zero tack earlier in the week. From shore reports there seemed to be a few issues which were largely resolved by the end of the day Posted on 12 Oct
America's Cup deal done despite World Sailing CEO
Cup organisers settle directly with World Sailing Board after political wrangle with CEO Emirates Team NZ have issued a statement advising that World Sailing CEO went behind their backs to the NZ Government after Special Event negotiations stalemated. His moves were rebuffed and the original offer made by ETNZ and COR/D has been accepted. Posted on 10 Oct
Stars + Stripes USA sign video deal with studio
Cup Challenger signs up with Condé Nast Entertainment to produce documentary Condé Nast Entertainment (CNE) and Stars+Stripes USA have announced a development deal for an unscripted show following the Long Beach Yacht Club's America's Cup team as they challenge the world's best and commit to bring the America's Cup back to the USA Posted on 8 Oct
America's Cup: Code Zero shown for the first time
Emirates Team Team New Zealand had fore-shortened training session on the Hauraki Gulf this morning Emirates Team Team New Zealand had fore-shortened training session on the Hauraki Gulf this morning, after their Code Zero let go. Update New images from ETNZ of the AC75 foiling and the blow-out with the Code Zero. Posted on 8 Oct
America's Cup: Off-camera action at Italian launch
La Stampa's Fabio Pozzo backgrounds the Luna Rossa AC75 launch and the off-camera action Leading Italian America's Cup correspondent, Fabio Pozzo was at the launch of Luna Rossa's AC75. He backgrounds some of the off-camera action from a launch typified by the understated elegance that has become the hallmark of the Italian fashion house. Posted on 6 Oct
America's Cup: Bertelli still critical of AC75
Luna Rossa's Patrizio Bertelli: "We could have had more teams with a less aggressive boat." "If the New Zealanders, the holders of the Cup, had listened to me, now we would surely have a greater number of challenging teams" says Luna Rossa's Patrizio Bertelli. "We could have had more teams with a less aggressive boat." Posted on 5 Oct
America's Cup: Analysis of INEOS Team UK AC75
Photographer Shaun Roster captured these images of the AC75 launch in Portsmouth The British America's Cup team INEOS Team UK was the last of the four "Super teams" in the 36th America's Cup to launch their AC75, which was splashed on Friday, UK time at Portsmouth. Shaun Roster was on hand to catch these images from the launch. Posted on 4 Oct
America's Cup: Update for October 2, 2019
Sail-World's NZ Editor, Richard Gladwell and's Tom Ehman compare notes Sail-World's New Zealand Editor, Richard Gladwell and's Tom Ehman compare notes on the current state of the America's Cup Posted on 3 Oct
Luna Rossa Prada Pirelli Team launch their AC75
Play spot the difference with the hull shape After months of simulations and trials on a smaller-scale model while the full-sized model was being built, the Luna Rossa Prada Pirelli Team revealed their new, totally black, AC75 during an official ceremony at their home base in Cagliari, Sardinia. Posted on 2 Oct
North Sails 2019 - NSVictoryList - FooterNaiad 660x82px_RescueZhik ATR Aroshell SW FOOTER