j class yacht length

Before the J Class yachts came into existence, yachts were designed to be bigger and bigger. The towering rigs of the Big Boat Class such as ‘ Lulworth ’ and ‘ Britannia ’ dwarfed all other yachts. The late 1920s heralded discussion and agreement of the Universal Rule. This new formula controlled the size and displacement of the new yachts, enabling them to be raced as evenly as possible. Almost immediately, designs were being commissioned for the new, massive ‘Bermudan rigs, with no bowsprits’.

The rule was based on ideas proposed by Nat Herreshoff allowing waterline length to be increased without sail area being restricted, as it had been under the International Rule. This was compensated by a larger displacement and so draught was limited to 15ft.

In 1929 Sir Thomas Lipton, owner of Lipton’s famous for his import of Lipton Tea from India, issued his fifth challenge to the Americans for the America’s Cup. He commissioned the build of the first J Class Yacht which signified the start of a new era in design evolution and racing. On each occasion he challenged for the America’s Cup as a member of the Royal Ulster Yacht Club in Northern Ireland.  RUYC  are still involved with The Cup – presenting the Royal Ulster Cup to the Club of the winning challenger.

The Universal Rule came into effect in 1930. The size of a yacht was determined (by waterline length) and this was shown as an alphabetical list. “J” signified yachts with a waterline length of between 75 to 87 feet. The addition of the new design Bermuda mast allowed the yachts to carry a huge sail plan. Nothing so large and ‘awesome’ had been built previously. The Americans had a distinct advantage over Britain in the 1930 America’s Cup. They had the money to build four J’s over Britain’s one, yet the British yacht, Shamrock V  was a hot contender. She was designed by Nicholson and built at the family yard in 1930, and before she crossed the Atlantic to attend the Cup she had notched up more than 700 sea miles (1,296km), won 15 out of the 22 races she had entered and had been tweaked and tested to a high degree.

In answer to Lipton’s challenge of 1929 the Americans designed four J-Class yachts as possible defenders. Enterprise, Whirlwind, Yankee and Weetamoe were launched within a month of each other; Weetamoe and Enterprise from the Herreshoff yard and Yankee and Whirlwind from Lawley & Son’s yard in Bristol.

Whirlwind, the second J, was the most revolutionary of the four. Francis L Herreshoff had moved away from conventional yachts and designed a boat, which took the new rule to its extreme. Whirlwind combined many new ideas and Herreshoff experimented with hull shape and rig. She was the longest of the early J’s at 86ft on the waterline and remained so until Ranger and Endeavour II were built in 1937.

She was built of semi-composite construction (the other three American Js were built out of the highly expensive Tobin bronze), was double-ended and had a permanent backstay. Uffa Fox described her profile as: “Very pleasing to the eye, the stem sweeping down to the keel in a very sweet line, and to a man who, like myself, believes that a pointed stern is a logical ending for all vessels, her stern is a joy to behold.” He predicted, “If the Yacht Racing Rules govern well and wisely, we shall see Whirlwind racing 50 years hence. If they do not she will probably be cruising then.” But Whirlwind met an early demise. Her building was delayed as she didn’t meet Lloyd’s A1 scantling rules and she wasn’t chosen to be the 1930s defender. She was often out-performed when close hauled, her steering gear making her difficult to steer. She was eventually scrapped along with Enterprise in 1935. However, her unusual double-headsail rig was later adopted by the rest of the Js.

The third American J, Yankee, was the best all-rounder. At 84ft on the waterline and 125ft length overall, she was solidly made of Tobin bronze and was extremely well balanced. Designed by Frank Paine , Yankee had an almost straight sheerline and easy lines. She was a powerful contender for defender, but not fine-tuned enough to succeed. She did, however, take part in the 1934 America’s Cup trials and with alterations to her rig, to carry more sail, and bow, which was lengthened and made more of a V-shape, she then proved more successful, especially in light winds.

The fourth of the American J’s was Weetamoe, which was designed by Clinton Crane and was the narrowest of the early four. Despite claims that Yankee was the best all-rounder, Weetamoe is said to have been the closest rival to Enterprise to be the Cup defender. Charles Nedwick, in Ian Dear’s book Enterprise to Endeavour, describes Weetamoe as having a profile “that is practically a triangle, with a straight line from the after end of the waterline to the bottom of the keel and thence a line which is slightly convex, and then slightly concave to the forward end of the waterline.” In an attempt to better performance and make her less tender, her profile below the water was radically altered in 1934 with a new contour and bulb keel. The alterations failed and not long afterwards were reversed. In common with the other J’s, she had about 43ft of overhang and her hull, Nicholson opined, “was the best of all the US Js”.

When Shamrock V and Enterprise eventually met off Newport, Rhode Island, later that year, the two J’s were well matched in hull profile, but differed significantly in rig. Enterprise’s rigging was lighter, she had the Park Avenue boom, which was so advantageous to windward, and had lots of winches on board. Shamrock V meanwhile, was under-winched and hard work to sail. She has since, however, proved her success in that she is still sailing today.

The sixth J-Class yacht to be built, and the second built on British soil was Velsheda . She was the only J not built as a contender for the America’s Cup. Her owner, WL Stephenson, who previously owned White Heather II, the 23-Metre converted to rate as a J-Class in 1930, had Velsheda built in steel in 1933 at the Camper & Nicholson yard. Velsheda was a great success. In 1935 she was significantly altered, her bow was snubbed around the waterline and her stern improved. The following season she won the King’s Cup at Cowes Week.

In 1934, Sopwith challenged for the America’s Cup. His challenger was Endeavour . She was Charles Nicholson’s third J-Class design and he said of her “She will have quite a normal hull… because I have thought it right to suppress possible experimental form, which would be most interesting to try out, but which I have to leave to American designers.” He did, however, produce the most beautiful J-Class and her rig was innovative.

Sopwith experimented with new running backstay strain gauges, which controlled the trim of the mast and used electronic windspeed and direction indicators. It has since been suggested that part of the reason for her failure in the Cup was due to all the gadgets on board. She was matched 83ft 3in on the waterline against Rainbow ’s 82ft. However, despite being thought to be the best challenger Britain has ever built, she did not win the Cup. Rainbow, which was considered the inferior boat, beat her by four races to two.

Rainbow was designed by W Starling Burgess and launched in 1934 from the Herreshoff yard where she was built in just 100 days. The J stepped a pear-shaped duralumin mast, designed to take the strain of the double-headed jib – first used on Whirlwind – and she was originally rigged with a Park Avenue boom. This was later removed because it was considered too heavy.

The UK Class was depressed with the death of King George V and scuttling of his yacht “Britannia” off the South of the Isle of Wight, in accordance with his will.

Of the American Js, Yankee was the only one to sail in British waters when she was bought by Gerald Lambert and crossed the Atlantic in 1935. She was scrapped in 1941. Enterprise and Whirlwind were both scrapped in America.

1937 saw the building of the last two J’s on both sides of the Atlantic. Both Ranger and Endeavour II took the waterline length to its extreme, measuring 87ft  LWL . Ranger, the American boat, was built at Bath Ironworks in Maine and designed jointly by W Starling Burgess and Olin Stephens . It was a design combination, which produced the greatest J of the fleet – the ‘super J’ as she was later known. She was built, for the cost of the materials only, of flush riveted steel plating and soon after launching had an accident. The upper parts of her rod rigging which stayed her duralumin mast shook loose and her mast snapped “with a report like a cannon”.

Ranger’s success on the water was widespread. Of 37 starts she won 35. Owner-skipper Harold Vanderbilt described her as being “slower to turn and to pick up speed, but (she) held her way longer, and was perfectly balanced on the wind.” The challenger, Endeavour II, was designed by Nicholson again and built at the C&N yard. She too was steel, but flush-plated above and below the waterline. Sopwith towed her and Endeavour, plus an entourage of 100, to America where he worked on tuning her rig. Sadly, Ranger saw off the competition, easily winning four races, and dashing British hopes.

Although they became recognised the most beautiful yacht design in the world, only 10 J Class yachts were ever built – 6 in the  USA  and 4 in the UK. Most of these competed in trials for the America’s Cup, or competed in the Cup itself. Several existing large British yachts, ‘ Astra ’, ‘ Candida ’, ‘White Heather II’ and ‘Britannia’, the King’s yacht, were all converted to comply with the rule and raced alongside the J’s.

After the victory of Ranger over Endeavour II, Vanderbilt wondered whether the boat was so much faster than the competition that it might kill the class. History would show this was not the case as analysis of the Holm design shows that it would likely have been faster than Ranger.

1937 marked the end of an era – it was the last America’s Cup contest for 21 years and marked the end of Big Yacht racing. Shamrock V was sold to Mario Crespi, the Italian Senator and publisher, who converted her to a ketch rig and renamed her ‘Quadrifoglio’, with a literal translation giving her authentic name of ‘4 leaves’ in Italian. This was in accordance with an Italian law, which forbade foreign names.

Weetamoe was scrapped in this year, while at the end of the season Ranger was laid up, prior to being scrapped in 1941.

HANDLING   THE  J  CLASS   YACHTS  IN  THE  1930’s

The Skippers had to be experienced in racing and their skill on the race circuit became a matter of pride. These mighty craft had no engines and they had to be handled with great precision to get into and out of ports. Often their experience came from sailing all types of small craft, including fishing boats, during the winter months, when the J Class yachts were laid up. The permanent racing crew in the early days was probably around 16 men thou this may have been augmented to around 30 for racing. When not required for sail changes, spare crew were often moved to below decks.

With the incredible loads on the rigging and systems it was a constant concern that J Class masts could collapse in winds above a Force 3.

Sailing small boats in often inhospitable waters gave them the skills to manage their J Class yachts. The same is true today. Skippers have to deliver their yachts across Oceans, and compete around the race course, using their skills and all the technical advantages that are available today.

It is now clear that there was another J Class Yacht under development in 1937. Several years ago, drawings for a J-Class boat by Swedish naval architect Tore Holm were discovered by Fred Meyer, (Société Nautique de Genève – the Defender of the 32nd America’s Cup).

Now known as the Holm Project, this was to be a Swedish yacht with an innovative design. Many of the hull plates were made – and exist to this day. The project was put on hold prior to the outbreak of War in 1939 and was forgotten for more than 60 years. Endeavour and Endeavour II (K6) were laid up at Camper & Nicholson’s yard in Gosport, England.

Rainbow was scrapped.
By the end of 1941, all the US yachts, which had been laid up were scrapped for their metal, with the last two being Yankee and Ranger. None survived. Yankee’s owner Gerard Lambert allegedly donated her scrap money from the yacht to Queen Mary to be used at her discretion in the London Hospital, in memory of the courtesies shown to Yankee by King George and the Queen herself.

Endeavour II was sold for scrap to Charles Kerridge Limited but her hulk remained until the late 1960s. Endeavour and Velsheda became houseboats in a mud berth on the River Hamble. This is where they stayed for more than 30 years, protected by the mud, which they had sunk into. Only Shamrock V was still sailing.

Endeavour II was broken up and scrapped in Southampton. Quadrifoglio (Shamrock V) had been hidden in Italy in a barn throughout the war years and following Crespi’s death in 1962 was sold to Piero Scanu, who saved her just two weeks before she was due to be broken up in Genoa.

During the 1970s Endeavour’s hulk was sold for £10 and restoration was started.

Quadrifoglio (Shamrock V) arrived from Italy and was refitted at Camper & Nicholson’s yard where she had been built, supervised by Paolo Scanu the naval architect, and son of the owner.

The large holes in Endeavour’s hull were plugged and she was towed to the old seaplane base at Calshot Spit on the Solent to start restoration.

Terry Brabant rescued Velsheda from her Hamble mud berth and gave her enough of a refit to get her chartering and, occasionally, racing again in events like the annual Round the Island Race, hosted by the Island Sailing Club in Cowes. Despite being in rather poor condition she still acquitted herself well and looked magnificent from a distance. Swiss plans to restore her came to nought and the old racing yacht was eventually laid up afloat in Gosport. Elizabeth Meyer took on the challenge to continue with the rebuild of Endeavour at Calshot.

Quadrifoglio (Shamrock V) was purchased in 1986 by the Thomas Lipton Company, and given back her original name of Shamrock V, when she became the property of the Newport Museum of Yachting. Endeavour was towed from Calshot, to Cowes on the Isle of Wight to have her fittings and rigging fitted. She was then taken on a barge to the Royal Huisman Shipyard in Holland to continue and complete the rebuild.

Endeavour was relaunched in Holland. Endeavour and Shamrock V match raced each other over the Old America’s Cup course in Newport, Rhode Island in August.

Velsheda was purchased from a bankrupt C&N boatyard and brought to Southampton Yacht Services to start her rebuild. She was relaunched in 1998 and started her programme of racing and cruising around the World.

Velsheda, Shamrock V and Endeavour raced against each other in Antigua Classic Week.

The Owners met in England and formed the J Class Association to protect the interests of the Class, present and future. Class Rules were established for the construction of Replica Rebuilds from original plans. Shamrock V came out of a major refit at Pendennis in Falmouth under the supervision of the Dykstra office.

The first J Class Regatta is held in Christchurch Bay on England’s south coast over three days, followed by the Jubilee Regatta in Cowes.

Ranger replica was commissioned and construction started at Danish Yacht Shipyard.

Ranger was launched and started her racing programme.

Replicas of Endeavour II (Hanuman) and Ranger (Lionheart) are commissioned.

Replicas of Rainbow and Paine design (JH7) are commissioned.

Hanuman, replica of Endeavor II launched.

Lionheart launched.

Rainbow launched. Cheveyo commissioned from Sparkman & Stephens / Spirit Yachts.

Information courtesy of the J Class Association

Svea, Velsheda and Topaz at the St Barths Bucket, 2018.

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Story of the J-Class Yachts:

The J-Class was adopted for America's Cup competition in 1928, looking forward to the next regatta in 1930.  The Class itself, though, dated back to the turn of the century when the Universal Rule was adopted though no J-Class yachts had yet been built.

The Rule used a yacht's various dimensions to calculate an equivalent rating in feet.  Boats of equal rated lengths could then race against each other directly without making other allowances for time or distance sailed.  Even though one yacht might have a longer length or another yacht a larger sail area, their overall configurations had to produce a rated length that met the Universal Rule for that class. Boats in Class J, more commonly today termed J-Class yachts, were the largest constructed under the Universal Rule.  The Rule actually includes provisions for an even larger type of boat, the I Class, though none were ever built.  Inquiries made in the 1930s for a Defense in the smaller K Class were rejected.

The J-Class were the first yachts in an America's Cup match to be governed by a formal design rule.  Previous defenders and challengers were only restricted by minimum and maximum lengths set forth in the Deed of Gift.  Sir Thomas Lipton, challenging in 1930 for the fifth time, had held earlier discussions with the New York Yacht Club in hopes of adopting the Universal Rule for the previous America's Cup match, intended for 1914 but delayed until 1920.  Though an agreement to use the rule was not reached for that match, the 1914 US boats, Vanitie and Resolute, still roughly followed J-Class parameters.

Building Program:

There were only 10 J-class yachts designed and built.  Additionally, several yachts of closely related dimensions, mostly 23-Meter International Rule boats, were converted after their construction to meet the rating rules of the J-Class. 

Only the purpose-built Cup yachts, though, could compete in the America's Cup.  The "converted" J-Class yachts, while acceptable for Class racing events, were not admissible for America's Cup competition.  Responding to issues that surfaced in earlier defenses, the America's Cup rules required that all boats had to be sailed to the event on their own bottom.  Some critics pointed out the possibility that the challenger might, as a result, be disadvantaged by  being of heavier construction than the defender.  In order to avoid a situation that could be perceived as an undue advantage, the NYYC eventually agreed that all America's Cup J-Class yachts would be built to Lloyds A1 standards, ensuring that defender and challenger met the same minimum construction specifications (the nautical term is "scantlings").  Most existing yachts were not built to such standards, so the Cup-eligible boats thus ended up heavier than the ineligible J's.

(The issue of challengers having to build heavier boats due to the ocean crossing was a popular, if uncertain, explanation in the British press for the long string of American victories.  In practice, a number of challengers added internal bracing for the crossing, which was then removed before racing.  And on a few occasions defenders subsequently made the crossing in reverse in search of competition following their successful defense.  The rule requiring that the challenger sail to the event on her own bottom was actually instituted in response to a super-lightweight challenger towed to the match through canals and rivers from Canada.

The J-Class Yachts

Disposition:

Conceived at the height of the affluent 1920's, the J-boats arrived during the Great Depression.  They required enormous crews, and, despite expert attention to their technical details, still broke an astonishing number of masts.  While they were in most regards the most advanced sailing yachts yet built, and they were  indeed powerful sailing thoroughbreds formed in sleek lines that can race the pulse of almost every viewer, the glorious J's proved too extravagant for their own good.  Most had very limited sailing careers outside of America's Cup.  Ranger , whose 1937 cost was upwards of $500,000, was laid-up at the end of her debut season and never sailed again.  All of the American J's were scrapped between 1935 and 1941. Most of the British J's were either abandoned or scrapped.

When NYYC sought to revive the America's Cup in the 1950s, there was a faction that favored returning to the J-Class.  Mike Vanderbilt even stated that not only would he like to see the Cup contested in the large boats, but that if so he would consider rebuilding a new Range r to the design of the original.  Still, another faction hoped for smaller dual-use yachts that could be used in offshore racing when the Cup year was ended.  With cost estimates for a 1958-era J starting around three million dollars, the impulse for a J-Class defense faded away in the face of economic pressures and a compromise was reached to sail the America's Cup in International Rule 12-Meters.

The J-Class Resurgent

J-Class rigs today are no longer built of wood or dur-alumin, but with modern lightweight composites.  Their sail technology is long past being canvas duck, and many other subtle changes have been made to make the ongoing maintenance and operation of these yachts a realistic proposition.  Still, the J-Class owners have gone to great lengths to insure the integrity of the boats.  The J-Class is self-administered, rather than governed by an outside organization as is the case with almost all other classes.  This allows the members to more easily adapt the rules in order to serve the needs of these uniquely historic yachts.

Most of the surviving J's are available for charter.  Cambria was reportedly for sale in 2000.  Endeavour changed hands in 2006 for a reported $13.1 million USD, though as her former owner Dennis Kozlowski said, "No one truly owns Endeavour .  She's a part of yachting history.''

Recreations, Replicas, and a Tender:

For decades, most yachting fans thought that we would never again see the likes of these boats again, the few survivors would sooner or later fade away, and the whole history would be reserved for books and fading photographs, but following the restoration of the surviving hulls rumors grew throughout the late 1990's and early 2000's about building "new" J's.  In 2001, all of this dock talk began to become reality:

Ranger Wooden Boat magazine, March/April 2001, described a "Dutchman" who had commissioned a new Ranger built to the original's plan.  This incredible rumor came true, and a piece of lost sailing history was brought back to life.  The new version of this "Superboat", as Mike Vanderbilt once called her, was officially launched in October, 2003. 

Designed by Studio Scanu and Reichel-Pugh, and built by Danish Yachts, Skagen, Denmark, she is not an exact replica of the original. Some would term her a re-interpretation, as a number of changes were made including greater freeboard, and Ranger 's original designers did not participate in the project.  The new Ranger first competed head-to-head against other J's in Antigua, Spring, 2004.  It took some additional adjustment after launch by her owners and designers to seek the proper trim that would make her float on her lines, an essential step in the process of being officially rated a J-Class yacht.  Visit the Ranger Website for more info.  J-Class Management is also at work on a restoration of Bystander, tender to the original Ranger .

Endeavour II An Endeavour II replica is being built at Royal Huisman Shipyard, with a planned 2008 launch date.  Gerard Dykstra and Partners is leading the project, which features a lightweight Alustar (aluminum alloy) hull and carbon-fiber mast.  See additional photo at Yachtspotter

Lionheart Based on an unbuilt alternate design by Starling Burgess and Olin Stephens II that was considered for 1937's America's Cup defender Ranger , this new boat is being built at yards in the Netherlands for an expected 2008 launch.  Lionheart will be the longest J-Class yacht when completed. See more including photos of the completed hull at the Lionheart Website and the story of sailing onboard including photos and videos Cruising J-Class Style Aboard Lionheart at Yachting World Designer:  Hoek Design Builders: Bloemsma Aluminiumbouw and Claasen Jachtbouw BV

Svea Tore Holm's unbuilt 1937 design, said by some to be faster in the test tank than any of the original boats, is being pursued by Hoek Design

Name To Be Announced In late March 2008, reports of another replica about to begin construction appeared on the Classic Boat website .  Whether this is one of the known projects, such as Svea , above, or yet another replica about to become reality, such as Rainbow , below, should become known shortly.

Rainbow In late May, 2008, Dykstra and Partners announced that a new build of the 1934 America's Cup Defender Rainbow was underway, with an expected launch date of 2010.  Read the Press Release

Other projects: Hoek Design is also studying replicas of 1930's Enterprise and another boat from Yankee designer Frank Paine.  Yankee herself has also been rumored as a new project, as well.  Earlier reports of a Ranger alternate-design carrying the name of Seawolf may have been referring to the project that has become Lionheart , see above.  Whirlwind and Weetamoe are the only two designs of the original ten J's that aren't known to be sailing, building, or under serious consideration as of 2008.  The J-Class website points out that there are 10 unbuilt J designs from the 1930's, so the possibilities for more J-Class yachts are intriguing.

Yachting World reported in May, 2003 , that construction was underway on a yacht replicating the famous G.L Watson design Britannia .  Photos showed a nearly completed hull at Solombala Shipyard, in Arkhangel, Russia, and included interviews with the yacht's owner Sigurd Coates of Norway.  The design was adapted by Cesil Stephansen from published plans.  The original designer's modern descendent company, G.L.Watson & Co., Ltd., has no involvement with the Arkhangel boat.  Little was been heard of this ambitious project for years, until the yacht was finally launched only to become subject of a financial dispute, trapping her in Russia until 2009, when she "escaped" to Norway. 

In the Spirit

A similar project to return elegant yachts to competitive racing, the W-class, was set in motion by Donald Tofias, an American enthusiast.  He commissioned naval architect Joel White to design a new class with lines evocative of famous racing yachts like the New York 50's and the J-Class.  The first two boats, Wild Horses and White Wings , were built in Maine of modern cold-molded wood construction and launched in 1998.  It is Tofias' aim that there will eventually be a whole fleet of the beautiful W-class to regularly compete against each other.  The one-design W-76 is actually similar to the New York 50's.  Tofias' long-range plans involve a range of classes including 46, 62, 76, 105, and 130.  The 130's would be nearly identical in basic dimensions to the J-class. See the W-Class Websit e .  

Additional Links: Chris Cameron onboard Ranger at Maxi Yacht Rolex Cup, 2010: Photo Gallery

Web Sites of Particular Interest: The J-Class Association J-Class Management, Inc.  

Further Notes:

K-Class: The Royal London Yacht Club made and withdrew its inquiry for a K-Class challenge in 1935.  The intent had been to reduce costs, not the least of which was hoped to be a lower velocity of mast replacement, but the K-Class line of thought was rejected for several reasons.  For one, the K-Class wasn't so much smaller than the J-Class as to have clearly led to significant savings.  Additionally, no K-Class yachts existed on either side of the Atlantic while several J's of various pedigree were available for testing, training, and racing in 1935.  Also a factor was that the NYYC was already actively considering another challenge at the time the RLYC began their communication  about the K-Class and it was the NYYC's policy to consider only one challenge at a time, in keeping with the Deed of Gift.

Sailing to the Event on Own Bottom: This provision of the Deed of Gift was at times strictly interpreted to the the degree of making sure that the challenging yacht actually was under her own sail while traveling to the match, not towed by another boat.  Challengers returning across the Atlantic after Cup matches concluded were sometimes towed for convenience. Eventually the NYYC agreed at various times to permit towing the yachts to the match, particularly when conditions were light, and in 1956, for the coming of the 12-meter yachts in 1958, the Deed of Gift was amended to eliminate the requirement.

CupInfo Home

What is a J Class

The terminology “J” Class refers to a class of racing yacht, the rules for which were established in 1929 and which resulted in the “J” Class rating for large sailing yachts built between 1929 and 1937 and used to compete in the Americas Cup racing series.

The formula which determines a “J” Class is complicated and relates to the relationship between the sail area and the waterline length but the general design stems from a time when art and design fought for the same space and combined to produce a design which pushed the technology of the time to win races whilst also being a visual spectacle of grace and elegance. These yachts were limited in number, hugely expensive to build and remained the playthings of the very rich. Most were scrapped for the Second World War but m ore recently there has been a resurgence of interest in the full sized yachts with regular racing of original, rebuilt and replica yachts around the world.

Th e pictures above are of “Lionheart”, a modern J Class yacht from Hoek Design in the Netherlands. Construction of the 44 metre hull commenced in 2007 and she was launched in 2010. If some modern designs of racing craft epitomise the search for speed over the water, Lionheart epitomises the search for both speed, and grace and elegance.

Lionheart is the inspiration for my one of my own Bermuda rigged Nottingham 48's.

Model makers attribute the title “J” Class to a certain configuration of hull and keel which I refer to as a "fu ll keel" (see Lionheart above) to distinguish it from the more modern 1 Metre or Marblehead model designs where the keel is a fin that drops vertically from the bottom of the hull and carries a torpedo shaped weight at its end. In reality it proves impossible to make a true working replica of a “J” Class as we can’t scale the physics of wind and water so some compromise is necessary! It nevertheless suits our purpose to refer to the smoother shape of the hull as a “J” Class and it is possible to remain faithful to the spirit of the design and also produce a practical working model which is aesthetically pleasing on the eye and which also sails well in a range of wind conditions.

More information on the J Class can be found here:

www.jclassyachts.com

www.cupinfo.com

www.sailing-yacht-lionheart.nl/

S/Y Rainbow

About rainbow.

The multiple award-winning J Class yacht Rainbow was launched at the Holland Jachtbouw shipyard in 2012. This spectacular J was based on William Starling Burgess’ original Rainbow , winner of the America’s Cup in 1934. Her impressive track record, eco-consciousness, and technique, but also her luxury comfort and style make her to be one of a kind within J Class. Rainbow’s innovation and style have received a lot of praise from the industry. At the 2013 Showboat Design Awards she won the Naval Architecture Award for sailing yachts and was a finalist for the Interior and Exterior Design Awards for sailing yachts as well. On top of that, Rainbow won the award for Best Sailing Yacht for 40m+ at the 2013 World Superyacht Awards.

Rainbow is equipped with an elegant classic Art Deco interior, designed by deVosdeVries Design. This interior is characteristic for the glorious 1930s. In addition, she was the first to have an innovative, hybrid propulsion and power system. Her luxury accommodation has not in any way compromised her performance, illustrated by her proven track record on the race course.

Designed by Dykstra Naval Architects, Rainbow is true to her original lines plans. The aluminium hull was built by Bloemsma Aluminiumbouw and meets all the requirements of Lloyds Register, MCA Classification and the J Class Association.

Rainbow’s stunning finish is down to the Holland Jachtbouw craftsmen who worked tirelessly to provide exactly the correct finish both above and below decks, giving her a unique appeal. Unlike the original Rainbow , her interior is fully fitted for elegant comfort. She has beautifully detailed mahogany panelling, lightly stained oak cabin floors and is fitted with antique lighting fixtures and other high-end materials such as marble. All this contributes to the recreation of the exuberantly luxurious and characteristically elegant Art Deco style of the 1930s.

The panoramic 360-degree view from the raised deck saloon offers breathtaking views while comfortably lounging. Stairs in the deck cabin lead to the main saloon of Rainbow , which allows up to eight guests to enjoy their dinner at the custom-built mahogany dining table. Opposite of the table, the L-shaped settee/daybed and cocktail table offer space for lounging and entertainment.

Spread over three luxurious guest cabins, Rainbow can accommodate a total of eight guests. The master cabin has a queensize bed, wardrobes, a desk on either side and an en suite bathroom. The other guest cabins are equipped with twin beds and Pullmans. Apart from the guest cabins, this beautiful sailing yacht also accommodates six to eight crew members.

Rainbow is the first J Class to have a unique hybrid propulsion and power system. This state-of-the-art system was built by the Dutch company WhisperPower, in close collaboration with Holland Jachtbouw. The WhisperPower system consists of a 50kw main engine with an integrated flywheel generator to provide power. The Genverter 50 (Hy-Gen 50kw) is the second power source: a lightweight variable speed generator, which is very energy efficient, but also exceptionally quiet. Both power sources are connected to Li-ion batteries (Hy-store) which is where the power is stored. These batteries work as a buffer as well, enabling electrically cruising for a minimum of 3 hours. Rainbow’s batteries can be charged while sailing, drastically reducing the carbon footprint.

Even though she was built to participate in J Class races, Rainbow is also utterly fit for cruising and chartering. The mast and boom are made out of carbon by Southern Spars, the standing rigging is carbon fiber/ECsix and her running rigging is Dyneema.

Whether Rainbow is used for racing or cruising; sailing with her is always an unforgettable experience!

Her luxury accommodation has not in any way compromised her performance, illustrated by her proven track record on the race course.

Specifications

Berthon Winter Collection

Latest issue

August 2024

In the August 2024 issue of Yachting World magazine: News Few finish a tempestuous Round The Island Race European rules are eased for cruising to France and Greece Olympic sailing…

Yachting World

• Digital Edition

The new heyday of the J Class – why this illustrious class is now more popular than ever

• Toby Hodges
• March 24, 2017

Toby Hodges on the 2017 renaissance of the giant J Class yachts

Yacht brokers Edmiston created the opportunity to get us aboard Endeavour , which is currently for sale ( see original blog and history here ), the most beautiful of the J Class yachts and ranked among the most iconic yachts ever. Sailing simply doesn’t get any finer than this.

Compare all the J Class yachts with our pocket guide .

The word that kept entering my head and one that can be applied to all J Class yachts is ‘majestic’. They sail upwind at 10 knots and downwind at up to 13 knots – pedestrian by today’s planing and flying standards – and can be beasts to handle. But J Class yachts remain sensational to sail and mesmerising to watch.

The launch of the latest J Class yacht Svea this January takes the current fleet up to nine. That’s a collective weight of around 1,600 tonnes, with a sail area over 8,360m2 (90,000ft2).

Stack the J Class masts up end to end and they would reach the top of the Empire State Building. Their collective worth is over £100 million according to some camps – priceless in others.

When you consider that there were only ever ten J Class yachts built originally in the 1930s, a maximum of four of which sailed together at one time, and that all bar three were destroyed for scrap – the fact that five J Class yachts have launched in the last eight years is a pretty radical turnaround.

Six J Class yachts will race for the first time ever in St Barth this March. Eight out of the nine will then go to Bermuda for the America’s Cup showcase event in June (perhaps all nine if Endeavour sells before then), where a record seven will compete – a prospect that few people could ever have imagined before the recent resurgence of the class.

The J Class is unparalleled in any sport: historic yet cutting edge, competitive but also used for pleasure. They are the multimillionaire’s ultimate racer-cruiser.

Unlike maxi racing yachts, Js have fully fitted luxury interiors, a rule instigated by the class to ensure a multi-role yacht.

Endeavour ’s finely appointed saloon.

One of the charms of J Class yachts is that their size and shape can swallow these interiors without harming performance – long overhangs mean the accommodation and associated weight remains central. And unlike modern performance superyachts that occasionally race, J Class yachts are seaworthy racing machines that can be cruised and are united by an absorbing history.

J Class yachts have the best systems, hydraulics, deck gear, sails and rigging to take the highest dynamic loads, and are crewed by armies of the most experienced pros on the circuit. Most J Class owners still enjoy cruising too. Indeed, both the current owners of Endeavour and Rainbow choose only to cruise – and over the last three decades, Endeavour has sailed all over the world.

A turning point for the class

In the last 15 years we have seen J Class yachts evolve from exhibition yachts to cutting edge race boats. The designs range from the wood-composite 1930-built Shamrock V , at 120ft the smallest J afloat, to the newly launched 143ft Svea , an aluminium masterpiece.

Superyachts Palma J Class Lionheart J-H1. Photo Nico Martinez

The America’s Cup Jubilee regatta in Cowes in 2001 was a real turning point for the class. For the previous 20 years the three Js had only cruised or raced with Corinthian crew. But when Endeavour showed the difference that racing with professionals could make, things changed.

Many were against the introduction of pro crews, but it was a transition that was inevitable if the three-strong class was ever to grow. These 180-tonne yachts could not conceivably race safely with five or more on the startline today without pros in key positions.

Ranger entered the scene in 2004 and this increased the momentum in the class further. Together with Velsheda she has been a stalwart of the regatta scene since.

The owner-drivers have become confident and competent, particularly on Velsheda and Lionheart , and can regularly boss and win the prestart with the aid of their expert tacticians.

But with more Js on the line this summer, the experience of top helmsman such as Ken Read ( Hanuman ), Erle Williams ( Ranger ) and Peter Holmberg ( Topaz ) could be a deciding factor. Clear air will be gold.

I have been fortunate enough to race aboard several J Class yachts in big regattas during this modern era and it is always an electrifying experience. It requires around 30 crewmembers to race a J, which is more than most other large racing yachts, with a team of no fewer than eight required to handle the spinnaker pole.

“The excitement is the closeness of the racing and all the loads and the amount of effort it takes to coordinate all 30 guys to do something at once,” said North Sails Scott Zebny. “That’s the cool part.”

• 1. Introduction
• 2. The Dutch design edge

Lionheart, JH1

Original lines: Burgess/Stephens / Modified lines: Hoek Design & Naval Architects

Image Credit:

Image Credit: 

Lionheart is the first modern replica J Class to be built in aluminium and was launched in July 2010. The original owner who commissioned JH1 was a repeat client of Andre Hoek who had then simply sought to build the fastest J Class yet.

Hoek developed their own VPP (velocity prediction program) software to analyse all the existing J Class designs before CFD and traditional tank testing with 6 metre long models. Hoek identified the J Class Ranger as outstanding from a family of seven Burgess and Stephens designs which were originally submitted to Harold Vanderbilt in 1936, and it was this design that was used for Lionheart.

The design showed exceptional promise as a very good all-rounder, fast on all points of sail in light, medium and heavy winds. Designed at 43.4m she was to be the longest on the waterline at the time.

In terms of deck and rig hardware, Lionheart fully utilised modern superyacht and grand prix race yacht technology where appropriate, significantly moving forwards J Class construction and specification using the most powerful winches and hydraulic systems available to optimise sail handling and trimming, keep all up weight down and to deal with the high rig loads.

Lionheart is the first J Class to have adopted a double cockpit layout with a private owners’ cockpit and deckhouse aft of the wheel and, forward of the wheel, a large guest cockpit leading to the main companionway and deckhouse. This allows the working area of the boat to be separated from the guests, improves communications between the afterguard and allows more of the working crew to work inside a cockpit rather than on the deck.

True to that original promise, Lionheart has been the standout performer on the race course since she was launched. From 2014 when they won in Menorca, Palma and Sardinia until 2017 when she won the seven boat J Class Superyacht Regatta and the J Class America’s Cup in Bermuda, followed by the inaugural J Class World Championship in Newport RI.

Then under the guidance of tactician Bouwe Bekking, the Lionheart project evolved to the highest level thanks to their desire to improve as a team. Each regatta saw Lionheart make comprehensive daily briefings and debriefings, they optimised their performance package and trained hard as a team. And over the years the owner became one of the most accomplished, competitive helms in the fleet. Bekking retained key core crew from the Brunel round the world race programme he skippered.

Lionheart has cruised extensively since 2017 and was expected to return to the race course in 2023 before their plans were put on hold.

Length at waterline

displacement

upwind sail area

spinnaker sail area

2013 Saint Barths Bucket

Lionheart 2nd

2013 Superyacht Cup Palma

2013 les voiles de saint-tropez.

Lionheart 3rd

2014 Menorca Maxi

Lionheart wins

2014 Superyacht Cup Palma

2014 maxi yacht rolex cup, 2015 j class falmouth regatta, 2015 rys bicentenary regatta cowes, 2016 maxi yacht rolex cup.

Lionheart wins on countback with Velsheda

2016 Les Voiles de Saint Tropez

2017 saint barths bucket, 2017 america’s cup superyacht regatta, bermuda, 2017 j class america’s cup regatta, 2017 j class world championships, newport.

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The new J Class sailing yacht Lionheart

Lionheart was the third new J Class to be launched since Harold S Vanderbilt's successful America's Cup Defender, Ranger , took to the water in 1937. In 2003, a replica of Vanderbilt's Super J Ranger left the Danish Yacht boat yard and immediately began racing, followed six years later by the J Class replica of Endeavour II , renamed Hanuman , leaving the Royal Huisman Shipyard and competing successfully against Ranger just four months after launching. With the launch of the Hoek Design_ Lionheart_ from Claasen Jachtbouw the stakes have been raised again.

The meeting between the replicas of Ranger and Endeavour II was significant when the duo met in 1930s, Ra nger _was victorious, but the more recent _Endeavour II-r eplica, Ha numan, triumphed on the water 90 years later.

For Andre Hoek, a detailed research program focused on testing the various, original J Class designs revealed that Lionheart was one of the best set of designs available for an all-round, high-performance J.

When an existing client came to us for a third yacht, his main interest was a new J Class yacht,' says Hoek. 'He asked us what we would do if we were to build a new J and that led to a proposal to first do a dedicated research project to determine what would possibly be the best performing J Class yacht.

'We proposed to analyse the theoretical performance of all existing J Class lines and to develop a dedicated Velocity Prediction Program specifically geared to J Class hulls with long keels,' the marine architect explains, 'as the existing VPP software is all for round-bilged hulls with fin keels and spade rudders, which are totally different hydrodynamically to a long keel hull with a rudder that forms a flap on a long keel.'

The proposal was accepted and a new Velocity Prediction Program for typical J Class hulls was developed together with Peter van Oossanen (of wing keel and FDHF fame).

Tank test data of a 20 foot long model of the J Class _Rainbow _was used to calibrate the mathematical formula of the VPP program. With this new software, initially all possible Super Js (with a maximum waterline length of 26.51m) were analysed for performance both on line honours and handicap.

The five best-performing hulls from this research were then analysed using computational fluid dynamics software (CFD). The CFD analysis confirmed the VPP findings and the search was narrowed to three hull designs:

One of the eight tank-tested designs commissioned by Vanderbilt from W Starling Burgess and Olin Stephens for the Ranger 77-F project;

Svea , designed by Sweden's Tore Holm in 1938 but never built; and A Frank C Paine design that didn't progress beyond the drawing board.'Of the final three, Lionheart showed the best overall performance,' Hoek reveals. 'The Paine-designed Atlantis is a very good light wind and downwind boat and Svea is the best upwind boat.'

Furthermore, the research proves that the_ Lionheart_ design is faster than the lines chosen for the original Ranger a choice that was not due to flaws in the combined wisdom of Vanderbilt, Burgess and Stephens, but purely that tank testing with models of just under a metre in length is now known to supply inconclusive and misleading data.

Once the optimum design podium was full, the client purchased the intellectual property rights for the Burgess/Stephens Ranger 77-F designs from Sparkman and Stephens and optimisation began on the_ Lionheart_ hull, rig and sail plan. The process started with recreating the 1937 lines to ensure that both port and starboard matched a common error in early, hand-drawn, pre-digital designs.

Continuing research soon showed that the designs with the buoyancy further forward were more effective; wind tunnel testing produced the sail plan geometry, and rudder angle calculations with the new VPP dictated the mast position.

The next phase in the design process was hull strength and construction. While the original J Class yachts were built in steel, the J Class Association (JCA) allows the modern, replica yachts to use aluminium a farsighted decision by the JCA, but one that raises issues of longitudinal stiffness in yachts possessing the enormous overhangs synonymous with the classic J Class profile.

To prevent the characteristic hogging, sagging and alarmingly slack standing rigging associated with an elastic, aluminium hull, Hoek and his team used a 3D finite element model (FEM) to explore load levels throughout the yacht, resulting in an exquisite, internal lattice of aluminium supports to keep Lionheart stiff, and hull panels of multiple thicknesses dependant on specific load stress areas.

While the overall hull design remained faithful to the original, 1930s J Class remit, one aspect of the replica hulls had to change. 'We are allowed to raise the freeboard by 10cm and make a bulwark of an extra 10cm above the level of the deck,' confirms Hoek. 'These are the only two changes you are allowed to make to the original lines.'

The reason the JCA introduced the rule change is simple: 'It has everything to do with the fact that the boats were never built to be equipped with vast interiors, generators, powered winches, galleys and electronics,' Hoek explains. 'There were hardly any interiors in these boats and they were purely built for racing.'

However, J Class purists who fear that the sanctity of the original class rule has been compromised with modern tampering should realise that the truth is somewhat different.

'Most people think that a J Class has an extremely low freeboard with long overhangs,' continues Hoek. 'Especially when you look at the original, surviving boats Ve lsheda, Shamrock V _and _Endeavour.'

In reality, the modern equipment on Velsheda and _Endeavour _has sunk both yachts by around 30cm below their 1930s waterline.

'None of the surviving Js fit the original Universal Rule now,' he adds.

The Universal Rule ensured that waterline length was no longer than 87 feet (26.51m). 'In some of them, the waterline length is now about 95 feet as they are so much lower in the water,' states Hoek.

Historically, the 26.51m waterline achieved by the Super J yachts was a fundamental advantage an area researched heavily by Vanderbilt.

'In 1936, they did a test with Rainbow and ballasted her down to precisely 26.51m,' recalls Hoek. Sinking the yacht below her natural 24.99m waterline delivered immediate results.

'She was faster than she was before due to the improved righting moment, but still did well in light airs,' he adds. 'The conclusion that a Rainbow -type boat at 26.51m waterline length would be high performance led to all the subsequent Ranger designs.'

The implications of this issue are twofold in terms of performance and aesthetics, for although modern photographs of the surviving yachts suggest that reduced freeboard is more in keeping with tradition, the replica Js with their stretched overall length in the overhangs to compensate for the increased freeboard, share an identical design DNA.

'So, technically, the freeboard of the new boats is higher,' explains Hoek, 'but they are actually closer to the original.'

Lionheart's immaculate hull has been built at the Bloemsma yard, a key player in the current J Class revival, which has also been responsible for the hulls of Atlantis and Rainbow . Lionheart's fitting out was done at Claasen Jachtbouw with a team of 20 craftsmen and specialist contractors working with extraordinary co-ordination in the yacht's slender hull.

Deeper into the boat at the turn of the bilge in an area that charter guests are unlikely to visit the engine room is a masterpiece of space management. Despite the sheer volume of engineering squeezed into such a confined space, it is possible to stand upright and move around without skinning elbows or slipping discs.

And while Claasen Jachtbouw is famous for its exquisite joinery work and attention to detail, technical installations are to very high quality levels as well. MCM from Newport, USA, acted as the owner's representative a team of specialists that have added considerable experience to the build team. Their vast technical and big boat racing experience has also contributed to the end result on board.

For Victor Weerens, the yacht's project manager at Claasen Jachtbouw, Lionheart has been an exceptional experience.

'It has been a great project for us with many challenges,' he admits. 'But the team here and our sub-contractors have met all the demands of building a modern J.'

After launching she was taken up river to Zaandam for the stepping of the clear-coat carbon mast and boom from Hall Spars with Future Fibres PBO rigging.

Bugsy Gedlek; Claasen Jachtbuow; Freddie Bloemsma Aluminiumbuow; and courtesy of Hoek Design

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