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The 12m Class and the America’s Cup By Halsey C. Herreshoff

Credit: www.herreshoff.org

The 150-year history of the America’s Cup, the oldest and most distinguished prize in world sport, is summarized from the author’s vantage point of belonging to a family of boat designers and builders who contributed to the dominance of American yachts from the beginning into the 1980s. Particulars and performances of the most important designs are described from AMERICA to the current International America’s Cup Class.

Introduction

The America’s Cup is the Holy Grail of yacht racing. It is much more. This Cup, in competition for a period of 150 years, is the oldest and most distinguished trophy in all sport, outdating the World Cup, Davis Cup, Stanley Cup, Walker Cup, and all others of significance. Excepting the lavish excesses of big time modern professional sport, more talent, effort, and money have been devoted to the America’s Cup than for any other sport competitions. From the standpoint of naval architecture, America’s Cup intensity has inspired countless design breakthroughs, fallout from which benefit all yachts today to an extent generally unrealized by those who sail. Here, a highly focused pursuit of excellence has provided quality, boldness, and dedication to be the best. The most elegant hull lines, most efficient construction, best sails, and most skillful sailing techniques have evolved from America’s Cup competition.

For 132 years (1851 to 1983), the United States enjoyed the longest winning streak in all sport. There were close calls but always the U.S. won the series and most of the individual races. Through that time, American yachts were generally, though not always, the fastest; thus, it may be fairly stated that victories followed very much from technical prowess.

As with any ship design, a sailing yacht embodies many necessary elements, which must dovetail to accomplish its mission. What is nice about America’s Cup design is that the only mission is speed, maneuverability and reliability to best a single match race rival around a closed course. Size, weight, wetted surface, hull form, light but strong construction, efficient rigs with good sails, sea kindliness and maneuverability are necessary. In general the successful boats embody acceptable or superior selections in the above categories. Bold innovation has been rewarded, but nearly always, extremes have failed. In a series of yacht races encompassing generally a variety of wind and sea conditions, an overall good boat wins.

It is appropriate to divide America’s Cup history into seven logical chronological divisions. The outstanding or most interesting yacht of each period will be addressed herewith. Listed below are the America’s Cup competitions by era with the names of the winning and defeated yachts respectively. In each case the focus yacht is in boldface type.

The l2-Metre era: 1958-1987

Following World War II, the conventional wisdom on both sides of the Atlantic was that the America’s Cup was done. The world was rebuilding and there seemed little prospect of funding further J boats given their assumed greatly accelerated cost. The Cup itself remained the pride of the New York Yacht Club, continually on display in the trophy room of the 44th Street Club House. Most of us expected it to just remain there for a long time, perhaps never to be raced for again.

Enter Commodores Henry Sears and Henry Morgan of the New York Yacht Club. By petitioning the Supreme Court of the State of New York, they modified the Deed of Gift to allow smaller yachts without the previous demand that challengers must cross the ocean on their own bottoms. It was agreed to compete in the International 12-Metre Class, which had provided excellent racing for several years before the war. Designed to the rather tight specifications of the International Rule, these boats did not really fit the grand traditions of the Cup but nevertheless provided nearly three decades of some of the finest match racing ever.

1958-1987: The 12-Metres 1958 COLUMBIA vs. SCEPTRE 1962 WEATHERLY vs. GRETEL 1964 CONSTELLATION vs. SOVEREIGN 1967 INTREPID vs. DAME PATTIE 1970 INTREPID vs. GRETEL II 1974 COURAGEOUS vs. SOUTHERN CROSS 1977 COURAGEOUS vs. AUSTRALIA 1980 FREEDOM vs. AUSTRALIA 1983 AUSTRALIA II vs. LIBERTY 1987 STARS & STRIPES vs. KOOKABURRA III

I can write more knowledgeably about the 12-Metre era than any other, as I was an active participant for 25 years and an observer for the full 29 years. Through acquaintance with Harry Sears, I was excused from other duties as a naval officer to sail aboard COLUMBIA, the 1958 Cup Defender, as bowman. Sailing aboard the 12’s in most of their seasons, I participated in four America’s Cup series, a total of 20 races; it was all about the greatest fun I’ve ever had.

The International Rule is an inelegant arbitrary formula that controls and restricts the design of these boats within narrow limits. There is a minimum length, maximum draft, maximum rig heights, and a set relation between length and displacement. Scantlings first in wood and later in aluminum are tightly controlled by specifics of the rule, Nevertheless, innovation in design particularly by Olin Stephens brought about nearly continual improvement of the boats, and the design edge of the United States long seemed to assure retention of the Cup as it did over many matches through 1980.

Curiously, some of the finest racing of all was in the finals of the first selection trials between COLUMBIA, sailed by Briggs Cunningham and designed by Sparkman & Stephens against Stephens prewar 12-Metre VIM. These were great tactical battles with racing margins of a few seconds in many races. The Cup race itself that year was a walk; SCEPTRE was a quite inferior design that had never faced competition before the match. As had happened a few times before, WEATHERLY, a weak American boat, won in 1962 by the brilliance of Bus Mobacher, her skipper. That was the first year of an Australian challenger and GRETEL won a race demonstrating the aggressive posture of Australian sailors.

Another S&S yacht, CONSTELLATION won in 1964. She was a quite elegant all-round boat, which was selected as Cup Defender over the large and powerful AMERICAN EAGLE, which was only superior in heavy weather. This should have been a tip off to the future but the true significance of having to design the smallest possible 12-Metre for Newport conditions was not generally appreciated until Australia II lifted the Cup in 1983. The reason 12-Metres form an exception to the axiom “design big” is the idiosyncrasy of the rule, particularly the prescription of increased displacement with length.

Olin Stephens’ INTREPID of 1967 was a breakthrough yacht. Wetted surface was drastically reduced with a shorter keel and separate rudder and the boat had numerous refinements. With outstanding management and the skill of Mosbacher again as skipper, INTREPID was unbeatable. The quest for further breakthroughs led to some peculiar and unsuccessful designs over the next two seasons.

The 1970 match was saved by repeat defense of INTREPID. In 1974, Olin Stephens designed another very fine boat, COURAGEOUS. Built of aluminum under new scantling rules, COURAGEOUS was powerful and superior in a breeze but did not easily defeat INTREPID, striving for a third defense. The selection trials reduced to a memorable sudden-death race in a 30-knot northeast breeze that COURAGEOUS won through both superior speed and better sailing. While I personally believe that Stephens’s 1977 boat, ENTERPRISE, was a further improvement in the same direction, Ted Turner sailing COURAGEOUS beat her out for the defense. Though not of demonstrably different dimensions, FREEDOM of 1980 seemed very superior. One difference was lower freeboard – providing a lower center of gravity and less hull windage. The new ingredient was a brilliant program of development of sails, gear and crew established by skipper Dennis Conner over a two-year program. The success of the program altered America’s Cup procedures from then on. Even with that, FREEDOM did lose one of the races of the match principally owing to a light-air advantage of Australia employing a rule-beating mainsail that gave her superior windward speed in light air.

Then, in 1983, the unthinkable happened in Newport when AUSTRALIA II beat LIBERTY in “The Race of the Century,” the sudden-death seventh race of that match. AUSTRALIA II was the best 12-Metre yacht to sail in the 25-year history of competition at Newport. Her extraordinary and controversial winged keel was, of course, the conspicuous feature. The ballyhoo about that masked the significant facts that AUSTRALIA II was the first boat to go to minimum 12-Metre length and displacement and that she had significantly less wetted surface than any other Twelve; this latter fact won the Cup! Less wetted surface followed naturally from a smaller boat but also from a keel of radically small planform. Where that had failed 13 years earlier in VALIANT with a conventional keel, it succeeded in spades on AUSTRALIA II because the winged keel provided sufficient hydrodynamic lift (side force) without the conventional large area. Because 12’s have draft limited by a function of length, they crave more draft or the equivalent effect. The lift-enhancing action of the “end plate” wings provided that very effectively.

While the racing ended at Newport in 1983 with the victory by the wonderful AUSTRALIA II, the subsequent events are equally interesting. Dennis Conner took charge again and with a brilliantly conceived and executed plan won back the Cup the first time sailing Twelves in the challenging waters of western Australia. The final STARS & STRIPES was a one-weather boat, big and powerful for the consistent “Doctor” (strong winds) of Freemantle. Others did not have the strength of their convictions to go with such a big and powerful boat. Dennis’s crew and tactics were admirable in this most wonderful challenge at a spectacular sailing locale.

The one-weather quality of STARS & STRIPES was abundantly clear from her total failure to win light-weather 12-Metre races in European waters later in 1987. An AUSTRALIA II type boat was needed there or would have been for continued 12-Metre races in Newport or San Diego.

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December 5, 2022

A brief history of the famous “12 metre” class yachts.

Historic Yachts

Fascination 12mR

Elegant Beauties

The boats, especially the long-keeled examples of the thirties are elegant. You can look at them for a long time, from the massive stem to the stern that is lifted apart from the water.

But let’s tell the story from the beginning

America’s Cup contenders between 1958 and 1987 – the 12 Metre Class

International Rules

The America’s Cup, the oldest Trophy

The Auld Mug

“12 metres” were designed with one thing in mind – to win America’s Cup races. The design of their products reflects this in every aspect. America’s Cup twelves didn’t have room for an engine, anything below decks, or even a toilet when they were campaigning. The deck layouts of America’s Cup twelves are set up for optimal sail performance as well as for speed. When racing, the sails are the engine of the boat, so trimming them correctly and quickly was crucial to winning. America’s Cup “12 Metre” crews were also trained for efficiency. When it was their turn to compete in the famous America’s Cup, they had intensive training and practice to be flawless at sail handling and the best yacht racers in the world.

During the summer months of August and October, many of these classic racers attend numerous sailing events on the French Riviera . Noblesse Yachts is the only company that offers sailing opportunities as well as yacht charters.

Come sail with us on a piece of America’s Cup racing history on these sleek racing beauties!

Available Dates are: 07.09. – 10.09.23: Vele d’Epoca di Imperia ( See Video here ) 13.09. – 16.09.23: Monaco Classic Week ( See Video here ) 19.09. – 25.09.23: Les Regates Royales de Cannes ( See Video here ) 24.09. – 08.10.23: Les Voiles de Saint Tropez ( See Video here )

Note about copyright: This text is copyrighted by us and you may copy and use it only with a link to our website along with a clear indication of our authorship. Thank you!

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Enterprise: Is this restored 12 Metre the best yacht to never contest the America’s Cup?

• November 19, 2019

Enterprise is a 1977 S&S-designed 12 Metre, originally built to defend the America’s Cup, and fully restored in time for this year’s 12 Metre World Championships in Rhode Island. Dave Powlison reports

Among the 21 elegant Twelves lining the docks at Rhode Island’s Fort Adams for this summer’s 12 Metre World Championship, sat a yacht that for many was a huge disappointment. Enterprise , built for the 1977 America’s Cup , had everything going for her, but never got the invitation to the Cup she seemed destined to receive. Today, she’s arguably the best set-up 12 Metre in the world.

Designed by Olin Stephens and David Pedrick at Sparkman & Stephens, and built of aluminium at the Minneford Yacht Yard, Enterprise boasted a number of firsts. She was the first design to be tank-tested on a large scale, with a handful of models measuring roughly 7m each, in tanks designed for the aerospace and military industries.

Results from those tests suggested that over a typical 24-mile America’s Cup course in an average 10-knot wind, Enterprise would be a minute faster than her rivals.  Enterprise was also the first yacht to pioneer laminate sails, using plastic films to stabilise the more conventional Dacron. Her sails included the ‘garbage bag’, a light airs genoa that (in colour, at least) suggested its moniker.

Enterprise posted two race wins in the 2019 12 Metre World Championships. Photo: Ian Roman

The 1977 Challenger matches were a rematch of the 1974 Courageous v Intrepid rivalry between upstart west coaster Lowell North and eastern establishment sailor Ted Hood.

At North’s right hand was sailmaking wunderkind John Marshall, who would be a dominant presence in Cup competitions for years to come. Many of Enterprise ’s crew had cut their 12 Metre teeth on Intrepid ’s successful 1970 Cup defence. In fact, Intrepid was brought out of retirement and trucked to San Diego to spar with the new design.

Yet it was Courageous , a 1974 design, that secured the spot to defend the Cup ( Courageous successfully saw off Alan Bond’s Australia in the Cup match). So what went wrong for Enterprise ? Anyone who knows the boat well won’t hesitate to respond. “ Enterprise had a foretriangle dimension that was about three feet shorter than what was conventional,” Marshall explained to me recently.

Enterprise hull is now painted battleship grey – the original colour was white

Most 12s have a 24ft foretriangle, give or take a bit. Enterprise ’s was 21ft. “Computer predictions that evaluated flow over surfaces suggested this would give us an edge,” Marshall recalled. But when it came to tacking, getting the stiff headsails quickly across was a challenge, as there was now 3ft more sail that had to pass around the front of the mast.

“The jib didn’t fill quite as quickly, and we didn’t accelerate quite as quickly coming out of tacks,” Marshall adds. In the early challenger races, Enterprise performed well. But as the summer progressed, Courageous got distinctly better. “Once the difference got down to being pretty small, and the boats were always close together, tacking performance became much more important.”

Consider that it wasn’t unheard of for 12 Metres to do over 50 tacks on a four-mile beat, and it’s clear why the writing was on the wall.

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Back to her best

Fast-forward to 2019 and Enterprise is back in fighting form. After stints in the Med she had been donated to the US Merchant Marine Academy Sailing Foundation.

With the impetus of the forthcoming 2019 Worlds in Newport, a major refit was begun in earnest. Tommy Rich, from New England Boatworks, which carried out the refit, recalls: “The boat had been bastardised. They had put a flush deck on it and a bogus interior, and it was basically in a state of disrepair.”

The refit was done over roughly two years, and in that time virtually everything on the boat was upgraded or replaced, except the hull and framework.

The hull structure is one of the few parts of the boat that remains original

Rich explains: “S&S, along with David Pedrick, designed a new keel. The boat got a more modern spade rudder to replace the old, barn-door type, and a more modern deck. That included new cockpits and a spinnaker pole trough – basically all the working deck – as well as a new chainplate structure.”

The boat received a new rig: an aluminium mast, as per the class rules, but with carbon used everywhere else, as well as all-new Harken hydraulics. And, of course, the ‘J’ foretriangle dimension is at 24ft once again.

For this level of investment in time and money, there was just one goal: to win the World Championship. Enterprise was chartered by Clay Deutsch for the summer, but the race started even before she had hit the water. “The challenge for us has been the calendar,” says Deutsch. “We didn’t have the boat in a position to go sailing until the end of May. And it’s pretty humbling how long it takes to get these boats dialed in.”

Double wheels: outer one for steering; inner one for trim tab control

Nevertheless, her pedigree showed quickly. In her first competition in Newport this summer, Enterprise posted a pair of 1sts in the two final races. In the 2019 World Championship in Newport she finished a solid 2nd overall in the Modern Division to the more seasoned Challenge XII .

For Deutsch, the 12 Metre seed was planted long ago. “When I was a kid, while other kids had baseball and football cards, I had an Intrepid scrapbook, and I have always fantasised about 12 Metres. Then, out of the blue this past winter, North Sails’ Mike Toppa came to me with, ‘What about Enterprise ?’ It was the furthest thing from my mind, and I just figured we wouldn’t be there.”

But Deutsch was persuaded, and work shifted into a frenzied pitch at New England Boatworks. “I remember when I first looked at it, and it was in a million pieces, and I said: ‘I’m not a professional, but my amateur opinion is that this boat has no chance of being ready.’

Asymmetric foredeck hatches – the port hatch has a roller on the aft side for spinnaker take downs

“But Ben Quatromoni, the project manager, and his team jumped on it, working around the clock, and we made it to the starting line.” Today Enterprise ’s decks today are remarkably spartan for a 12 Metre: it’s 1977 meets 2019 technology, with lots of carbon. “The boat setup is complicated,” says Quatromoni, “but it’s very user-friendly.”

The port foredeck hatch has a roller on the aft side, TP52 -style, for the string take down spinnaker system. Once around the roller, the chute is pulled through a Dacron tube that runs to the stern. With the grinders working in unison, the sail disappears in five seconds.

Control lines run through custom-made carbon ‘trumpets’, allowing them move effortlessly out of sight. Carbon reels take up the halyards. These are ratchet system reels, where one control line spins the reel, bringing the halyard in, and another control line releases it. Unlike those reels, the spinnaker take-down reel is powered off the pedestals.

The spinnaker take down bag; the spinnaker comes down through the forward deck hatch and is pulled through this long Dacron bag

The aluminium cockpit has been lowered to get the grinders down and allow the boom to just avoid grazing the deck when fully sheeted in. But the boom is low. “Man, is it crowded,” says Deutsch. “I can barely fit under the boom – when we’re tacking, I’m literally down on all fours.”

The port and starboard jib trimmer pits have hydraulic controls for the jib tack and jib leads, which is standard for the Twelves. As on most 12 Metres, below decks is anything but simple.

The 150ft of mainsheet runs from the traveller car up into the boom, forward to the gooseneck, below deck, then aft to a turning block where it goes up into the mainsheet pod. Rather than using a winch for the traveller, the car is controlled by a Harken magic wheel below decks, with a 17:1 purchase.

With so many hydraulic systems, continual pumping is required to keep them pressurised, and the aft cockpit pedestal is set up to run a rotary pump, mounted below, for that purpose. For trimmers, there’s no downtime. Once they’ve finished trimming, it’s back to pumping to keep the hydraulics powered up.

The workmanship on many of the systems is truly extraordinary. The turning blocks for the spinnaker sheet and guy are so inconspicuous as to be barely noticeable. The traveller control line looks as if it has been simply laid on deck.  Enterprise ’s original white hull is now battleship grey. Coupled with black spars, the effect is stunning.

Specification

LOA: 20.15m (66ft 1in) LWL : 13.41m (44ft 0in) Beam: 3.78m   ( 12ft 5in) Draught: 3.78m   ( 12ft 5in) Displacement: 25.7 tonnes Sail area: 168m 2  (1,808ft 2 ) Design: Sparkman & Stephens Year: 1977 Builder: Minneford Yacht Yard, Inc.

About the author

Dave Powlison has been writing about sailing since the late 1970s and is currently an editor-at-large for Sailing World magazine. When not writing, he races Etchells and an RS Aeros in Vermont, USA.

First published in the November 2019 edition of Yachting World.

The 12-Metre Class is a rating class for racing boats designed to the International rule. It enables fair competition between boats that rate in the class whilst retaining the freedom to experiment with the details of their designs. The first 12 Metres were built in 1907. The 12 Metre Class was used in the Olympic Games of 1908, 1912 and 1920 but only few boats participated. The 12 Metre Class boats are probably best known for their use from 1958 to 1987 in the America’s Cup.

Rough equality between boats is ensured by requiring compliance with a formula that takes  account of the length at the waterline, the girth (the measurement around the boat from one sideboard; under the keel and then back over the top on the opposite side back to the original side) and the sail area. The very carefully specified measurements are then entered in to the formula, and the result must be 12 Metres – hence the name of the class. Designers are free to change any of these variables (as well as other details, such as the size of the rudder and keel, etc.), with the understanding that for any change in any of the measured attributes, something else will have to be adjusted, in order to make the formula produce the required value.

The “12 Metre” in the class name does not refer to the actual length of the boats, which ranged from 65 to 75 feet (about 20 to 23 m) overall. They were all sloop-rigged, with their masts typically being about 85 feet (26 m) tall. The “12 Metre” yachts are also referred to as “Twelves” or “12 Metres” or even 12s.

The Formula and associated rules for designing and constructing 12 Metre yachts has been modified several times from inception in racing.

The purpose of the Formula and rules was to encourage designer creativity to optimise designs to get the best overall performance when racing whilst maintaining competitive racing between the different designs. Although the Formula and Rules allowed some creativity they were also intended to be comprehensive enough to eliminate loopholes which could result in an extreme design which conformed to the 12 Metre rule but completely outclassed other contemporary designs on the race course. If the rules were considered to be too loose then it would discourage the building of new 12 Metre yachts for fear of a new boat being outclassed even before it was launched.

The Rules were typically updated in response to advances in areas such as material technology (e.g. metal masts versus wooden masts), design technology (e.g. use of the wind tunnel to design sails and sail/mast combinations, advances in fluid dynamics), and equipment (e.g. winch technology).

The Rule has four distinct periods:

Used from 1907–1920

• L  = waterline length (LWL)
• B  = beam
• G  = chain girth
• d  = difference between skin girth and chain girth
• S  = sail area
• F  = freeboard

Used from 1920–1933

Used from 1933–1939

Used from 1956 onwards:

Associated with the formula is an extremely comprehensive set of rules. The rules can be classified into two main areas. Rules concerning safety and rules to ensure competitive racing. For example the maximum total area of all cockpits is specified to minimise the chance of a boat being swamped in rougher seas. Structural requirements are specified to ensure that strength is not sacrificed by the need to get weight low down in the keel. Materials are specified plus numerous other details concerning all aspects of the boat. The intention is to challenge designers but ensure competitive racing.

Information courtesy of the ‘Australian Twelves Association’.

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12 Metre Worlds

Official website of the International Twelve Metre Class World Championships

ABOUT THE 2019 12 METRE WORLD CHAMPIONSHIP:

The International 12 Metre Class’ 2019 World Championship was held at Newport, Rhode Island (USA) from July 8- 13, hosted by the Ida Lewis Yacht Club and the 12 Metre Yacht Club . It was the largest-ever gathering of 12 Metre yachts in the United States featuring 22 boats from seven countries. International teams comprised of elite sailors including America’s Cup veterans and Olympic medalists will represent Australia, Canada, Denmark, Finland, Italy, Norway and the United States. The 2019 12 Metre World Championship fleet will span the years 1928 -1987, include seven America’s Cup defenders and challengers, and be sailed on Rhode Island Sound, the site of nine America’s Cup competitions from 1958-1983.

ABOUT THE INTERNATIONAL 12 METRE CLASS:

The 112 year-old International 12 Metre Class encompasses a living history of racing yacht design by the world’s foremost naval architects including Olin Stephens, Clinton Crane, William Fife III, Philip Rhodes, Johan Anker, Ben Lexcen and more who pushed their designs to the very limits of innovation. The resulting boats represented the pinnacle of yacht development from 1907-1987 for the highest levels of international sailing competition– the Olympic Games (1908-1920) and the America’s Cup (1958-1987).

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Northern Light, US-14

Built in 1938 according to the International Third Rule.

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Event Details

12 METRE RACING

Philipsburg, Sint Maarten

Length: 20.11 Metres (66 Feet)

Beam: 3.65 Metres (12 Feet)

Draft: 2.72 Metres (8.9 Feet)

Sail: 166 Sq. Metres (1786 Sq. Feet)

THE HISTORY

Canada II is generally regarded as being the fastest light air 12 Metre Class sailboat in the world.

Canada II was designed by Bruce Kirby and built by McConnel Marine in 1982, and competed in the 1983 Louis Vuitton Cup as Canada I. In between the ’83 and ’87 competitions she was radically redesigned, being extended both in her bow and stern, given the addition of a winged keel, and rechristened Canada II. She went on to serve as Western Canada’s challenge for the 1987 Louis Vuitton Cup under the flag of the Royal Canadian Yacht Club. She is extremely fast, agile and tough to beat during every 12 Metre Regatta race!