Please select your home edition
Edition
Selden 2020 - LEADERBOARD

America's Cup: Emirates Team NZ's has high speed dive

by Richard Gladwell/Sail-World.com/nz 7 Nov 2019 10:49 GMT 7 November 2019
Emirates Team New Zealand's Te Aihe, Waitemata Harbour, November 7, 2019 © Richard Gladwell / Sail-World.com

Emirates Team New Zealand's AC75 had another high-speed smash while training in moderate to fresh winds on the Hauraki Gulf today.

The sequence was caught on camera, at long distance, by Sail-World NZ, and revealed some interesting characteristics of the AC75. Please excuse the graininess of the images which were shot at a range of 2.5nm.

The incident happened in a steady sea breeze (NE) of around 18kts, with some chop/wind waves with no accompanying swell.

The nosedive happened very quickly while the AC75 was sailing at very impressive speed to windward and suddenly nosedived.

The skiff hull threw a lot of white water, and the upward force generated by the leeward wing was sufficient to force the AC75 to roll sharply before the wing lifted clear of the water during the roll.

The mainsail appeared not to be tensioned in some shots of the AC75 sailing on her centre bustle and windward side. The soft mainsail (and suddenly release of pressure onto the downward foil) could account for the foil driving upwards and rolling the AC75 onto her centre bustle and windward side. The windward foil arm was still extended pulling the AC75 over to windward, aiding, and not countering the rolling motion induced by the leeward wing.

The AC75 slithered along the surface, still heeled before rolling upright, and coming to a complete stop.

After a pausing sailing for a few minutes, presumably to check and mark the data stream, and converse with design engineers on the chase boat, the AC75 took off again sailing very quickly to windward, before turning downwind and sailing at high speed without further nosediving. The incident was later dismissed as "learning".

The rest of the seven-hour training session was conducted in flatter water in "The Paddock" - the area to the east of Browns Island and sheltered by Waiheke Island to the north, used by ETNZ in their build-up to the America's Cup in Bermuda.

Related Articles

America's Cup: Tom Whidden's take-outs from AC36
Three times America's Cup winner Tom Whidden looks back at the 36th America's Cup and technology Three times America's Cup winner and President of North Technology Group, Tom Whidden, shared some insights into the 36th America's Cup during a Wednesday Yachting Luncheon hosted by Ron Young of St Francis Yacht Club, San Francisco. Posted on 20 Jun
America's Cup: Spanish ratchet up Cup stakes
America's Cup: Valencia comes up with innovative hosting approach Backers of Valencia's bid to stage the 37th America's Cup believe they can access a €750 billion fund established by the European Union to assist member countries to recover from the economic effects of the COVID pandemic. Posted on 18 Jun
Valencia in this mix to host 37th America's Cup
Existing, ready-for-use, tailored infrastructures and previous hosting experience Valencia's successful history in hosting the America's Cup, its existing, ready-for-use, tailored infrastructures made positioning Valencia's as potential host for the next event obvious. Posted on 18 Jun
America's Cup: NZ Govt confirm $100m declined
Kiwi Government confirm ETNZ Board has said "Thanks, but no thanks". The Minister responsible for the America's Cup has confirmed the joint Crown-Auckland Council offer to host the next regatta has been declined by the Board of Team New Zealand. Posted on 15 Jun
America's Cup: Steady hand on helm at Briefing
“The writing is on the wall” for a Cup defence in Auckland - reaction from RNZYS Members Briefing The America's Cup briefing for Royal New Zealand Yacht Squadron members only, turned into a rather low-key affair, with no major announcements. Posted on 15 Jun
America's Cup set to go offshore until COVID fades
A traditional America's Cup defence is not expected to be conducted in Auckland until COVID fades On Thursday, the 90 days "good faith" negotiation period ends for Auckland to be Host Venue of the 37th America's Cup. The outcome is expected to be that a traditional America's Cup defence will not be conducted in Auckland. Posted on 15 Jun
Team NZ Board Chair hits back at fake media claims
Tindall responds angrily to claims he is offside with the team's plans for its fourth Cup Defence. Sir Stephen Tindall, the recently resigned Chairman of the Board of Team New Zealand has responded angrily to media claims that his retirement is "proof positive" he is offside with the team's plans to go offshore for its fourth Cup Defence. Posted on 14 Jun
Suzanne McFadden wins supreme sports award
Suzanne McFadden has been instrumental in the upsurge in coverage of women's sport Leading America's Cup correspondent, Suzanne McFadden has been instrumental in the upsurge in coverage of women's sport in this country and was recently named New Zealand sport journalist of the year. She looks back at her career in this podcast with YNZ. Posted on 14 Jun
Brad Butterworth on winning four America's Cups
Shirley Robertson's talks with one of the most successful tacticians of the modern era From the America's Cup to the Whitbread, the Admirals Cup to the Sydney Hobart, NZ's Brad Butterworth has been at the sharp end of competitive sailing for his entire adult life, and has a grand prix sailing CV few could match. Posted on 9 Jun
America's Cup: Board Chairman Tindall exits ETNZ
Sir Stephen Tindall is retiring as Chairman and Director of the Board of Emirates Team Sir Stephen Tindall is retiring as Chairman and Director of the Board of Emirates Team New Zealand after a long and successful tenure as Director of the four times America's Cup winning team. Posted on 4 Jun