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January 25, 2013 By Jack Griffin

America’s Cup Race Course – details

 

Louis Vuitton Cup and America's Cup race course. San Francisco 2013 Louis Vuitton Cup and America’s Cup race course. San Francisco 2013

The America’s Cup race course is right on the San Francisco city front.

The course layouts were published in Regatta Notice 81 dated Dec 31, 2011, as required by the Protocol, paragraph 12 d (f).

America's Cup race course diagram. America’s Cup race course diagram.

There are two possible variations. Both start with a reaching leg at the western (Golden Gate) end of the course, which can be 0.25 to 1.0 nm long. Both end with another reaching leg, at the eastern (Pier 27-29 / AC Village) end of the course, which can 0.5 to 1.5 nm long. In between the starting reach leg and the finishing reach leg, there will be

  1.  two downwind legs and one upwind leg giving a race approximately 30 minutes long, OR
  2.  four downwind legs and three upwind legs giving a race approximately 60 minutes long

Variation 1 will be used for the America’s Cup Match and for the Louis Vuitton Cup finals.
Variation 2 will be used for the Louis Vuitton Cup round robin and semi-final.

What this means for for boat design and race tactics

If, like Emirates Team New Zealand, you designed your boat for foiling, you may have sacrificed upwind speed for more speed when reaching and downwind. So you need to build enough of a lead on the reaching and downwind legs so that a non-foiling competitor, perhaps Artemis, cannot beat you with better upwind speed. Given that both possible courses have one more downwind leg than upwind, you have an advantage.

As to tactics, the “transitions” will be crucial:  how much speed do you lose in a tack or a gybe? If you are foiling, what is the crew choreography to gybe the boat, dropping the old windward daggerboard and getting up and foiling after the gybe? Remember: only 11 crew.  One or two are needed to steer through the gybe, six may be on the handles grinding to provide power to trim the wing, furl and unfurl the gennaker and control the angle of attack of the daggerboards.  You need one crew to lower the a daggerboard and one to raise the other. Somebody needs to handle the gennaker furler and somebody needs to trim the gennaker when it unfurls.  If you think there is a lot to do and not enough crew, you are right!

Until the racing starts in July, we can only speculate about who has an advantage.  One thing is sure: regardless of design decisions, teams will need to sail well and avoid crew errors in order to win!

See more info about ergonomics and crew choreography here

 

January 24, 2013 By Jack Griffin

Soldini and “Maserati” crew want the Gold Rush Route record

 

VO70 Maserati currently attempting the monohull record on the Gold Rush Route - New York to San Francisco, around Cape Horn VO70 Maserati currently attempting the monohull record on the Gold Rush Route – New York to San Francisco, around Cape Horn VO70 Maserati, skippered by Giovanni Soldini, is currently attempting the monohull record on the Gold Rush Route – New York to San Francisco, around Cape Horn

Making maritime history in San Francisco – not just the “America’s Cup”

San Francisco will host the America’s Cup in 2013. This iconic event is a battle of technology and sailing skill fueled by the egos and fortunes of the tycoons who have been captivated by this silver trophy. The yacht “America” first won the trophy on August 22, 1851, racing against the cream of British yachting in a race around the Isle of Wight.

Poster announcing the £100 guinea cup which became Poster announcing the £100 guinea cup which became “America’s Cup” Royal Yacht Squadron poster 1851. The RYS £100 Cup became “America’s Cup” America's Cup trophy America’s Cup trophy America’s Cup trophy

This trophy, named after the yacht that first won it, remained in the hands of the New York Yacht Club until 1983, when the challenger from Australia won it – 132 years after “America.”

The yacht The yacht “America” in 1851 The yacht “America” in 1851

“Flying Cloud” made history in 1851, too.  And her record stood even longer than the US grip on  “America’s Cup”

Gold Rush Route: New York to San Francisco. Flying Cloud held the record - 89 days - from 1851-1989. Gold Rush Route: New York to San Francisco. Flying Cloud held the record – 89 days – from 1851-1989. Gold Rush Route: New York to San Francisco. Flying Cloud held the record – 89 days – from 1851-1989.

August 1851 was a golden moment in US maritime history – nine days after “America” won her cup in UK waters, “Flying Cloud” dropped anchor in San Francisco Bay, 89 days and 21 hours after leaving New York. This was an astonishing passage – around Cape Horn against the prevailing powerful winds – in less than half the usual time for the New York to San Francisco passage.  The gold rush was in full swing, and speed was everything.

Poster for fast clipper ship to California and the gold rush Poster for fast clipper ship to California and the gold rush During the Gold Rush, speed was everything

“Flying Cloud” carried 11 passengers and cargo. Her main mast broke twice during the passage and was repaired under way by the ship’s carpenter and crew. Two crewmen tried to sabotage her, drilling holes in the hull.  And yet, no vessel of any kind sailed faster from New York to San Francisco until 1989! “Flying Cloud” held the record for the “Gold Rush Route” for 138 years – longer than the New York Yacht Club held “America’s” Cup. The record has been bettered three times since 1989. The current record is 43 days 38 seconds, set in 2008 by Lionel Lemonchois in the giant catamaran “Gitana 13.”

Gitana 13 set the outright Gold Rush Route record in 2008 - 47 days New York to San Francisco. Flying Cloud held the record from 1851-1989. Gitana 13 set the outright Gold Rush Route record in 2008 – 47 days New York to San Francisco. Flying Cloud held the record from 1851-1989. “Gitana 13” set the outright Gold Rush Route record in 2008 – 47 days New York to San Francisco. “Flying Cloud” held the record from 1851-1989.

Yves Parlier holds the monohull Gold Rush Route record  with “Aquitaine Innovations” – 57 days 3 hours.  This is the record that Giovanni Soldini and the crew of “Maserati” are trying to beat.

Yves Parlier holds the monohull Gold Rush Route record - 57 days- with Aquitaine Innovations. Yves Parlier holds the monohull Gold Rush Route record – 57 days- with Aquitaine Innovations. Yves Parlier holds the monohull Gold Rush Route record – 57 days- with Aquitaine Innovations.

 

January 21, 2013 By Jack Griffin

AC72 Design – Artemis wing1 and 2 side by side

 

AC72 wing sail 1 & 2 for 2013 America's Cup in San Francisco AC72 wing sail 1 & 2 for 2013 America’s Cup in San Francisco Wings 1 & 2 side by side. Artemis AC72 Artemis Racing has put wing 2 in the boat recently and will be sailing with it soon. Their AC72 design team has made big changes from wing 1: The new wing looks to have only 2 elements (meaning only 1 slot between elements) and the flaps are much wider. In “tech-speak” this means the ratio of the chords of the 2 elements has changed dramatically. (Look here for Wikipedia’s discussion of chords in wings.) The AC72 design battle continues, in the build up to the 2013 America’s Cup in San Francisco!

 

January 18, 2013 By Jack Griffin

New pages on AC72 design

 

The AC72 catamarans don’t race until the Louis Vuitton Cup in July. Right now the competition is among the designers as the teams develop their boats.  Foils, wing sails, hull shapes, aerodynamics, ergonomics and other cool stuff – you’ll find it on the CupExperience AC72 Design pages.
See these new pages describing the AC72 design choices made by Oracle, Artemis, Emirates Team New Zealand and Luna Rossa. It’s so important, it’s in the CupExperience main menu.

You’ll find the first series of articles on the AC 72 design battle by clicking the main menu or here.

Artemis has a central station for grinders and trimmers.

AC72 wing sail for Artemis

 

January 17, 2013 By Jack Griffin

AC72 Guest Racer and LiveLine pod

 

AC72-design-guestracer-pod-900w
AC72 guest racer – 2013 America’s Cup

Update: The Safety Recommendations issued on 22 May 2013 eliminated Guest Racers during racing.

The LiveLine team designed a pod for the Guest Race and the LiveLine electronics. It bolts on to the rear crossbeam of the AC72. How will this affect aerodynamics? “USA 17” and “New Zealand” both have fairings that need to be modified.

AC72 catamarans will carry a guest racer in this bolt on “pod” that also holds the LiveLine electronics, a video camera and signal lights.

It is not clear that the design teams have given any thought to this as they add fairings to the rear crossbeam of their AC72.

AC72 catamaran New Zealand, for 2013 America's Cup.  AC72 catamaran New Zealand, for 2013 America’s Cup. “New Zealand” in early testing. No fairing on rear crossbeam.

AC72-NZ-fairing
AC72 catamaran for 2013 America’s Cup. Some of the fairing needs to be cut away.

A fairing has been adde to the rear crossbeam, but no space for the Guest Racer pod

AC72-USA17-fairing
Oracle’s AC72 catamaran for 2013 America’s Cup. Oracle did not leave space for the Guest Racer pod

 

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