sailing on a j class yacht

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.

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Shamrock V, JK3

Design: Charles E Nicholson

Image Credit:

Image Credit: 

In 1929 Sir Thomas Lipton, who had reached worldwide fame through his tea business issued his fifth challenge for the America’s Cup and commissioned Charles E. Nicholson, to design the first J-Class Yacht, Shamrock V, to the Universal Rule, signifying the birth of the J Class and the start of a new era in design evolution and racing.

‍ Shamrock V was built out of mahogany planking over steel frames and launched at the Camper & Nicholsons Gosport yard on 14th April 1930. She showed early promise on the British Regatta circuit winning 15 of 22 races and placing second in an additional four. She also underwent continuous upgrading with changes to her hull shape, rudder and modifications to the rig to create a more effective racing sail plan.

‍ Temporarily re-rigged as a ketch, Shamrock V crossed the Atlantic to America on her own bottom fully fitted out with internal accommodation. On arrival, she met Harold Vanderbilt’s Enterprise - race-ready, stripped out and equipped with several pioneering features such as a Park Avenue Boom, hidden lightweight winches and the world’s first Duralumin mast. The America’s Cup arms race was on, and Enterprise took the 15th America's Cup with a clean sweep. Sir Thomas Lipton, after endearing himself to the American public over 31 years and five attempts, would die the following year having never fulfilled his ambition to win the cup. The British aviation industrialist Sir Thomas Sopwith bought her in 1931 as a trial horse to gain J-Class racing experience before his challenge for the 16th America's Cup.  Shamrock was then sold to Sopwith's aviation friend, and fellow yachtsman, Sir Richard Fairey of Fairey Aviation who continued to optimise Shamrock with aerodynamic and hydrodynamic modifications.

‍ In 1937, Shamrock was bought by the Italian senator and industrialist Mario Crespi. This change in ownership prompted Shamrock's only name change. Italian Fascist law had banned the use of foreign names in society. Accordingly, Shamrock V was renamed Quadrifoglio (cloverleaf). Crespi was also the first owner who modified Shamrock for comfort by installing a luxurious interior for longer passages. The next owner, Piero Scanu, instigated a comprehensive three-year overhaul at the Camper & Nicholsons yard commencing. Whilst this refit saved Shamrock, it also took her further away from her thoroughbred origins with the installation of high bulwarks and a large deckhouse. In 1986, Shamrock V returned to the ownership of the Lipton Tea Company who donated her to the Museum of Yachting at Newport, Rhode Island. Another extensive and famed restoration was carried out by Elizabeth Meyer in 1989, which alongside her restoration of Endeavour, returned these two J Class to racing form and allowed the first J Class racing since 1937. This stimulated interest in restoring and building replica J Class yachts.

‍ Following changes of ownership in the 1990s but still under Elizabeth Meyer’s management, Shamrock underwent renovation at Pendennis in 2000 where comprehensive works were planned to improve the yacht’s ballast ratio and with the addition of a new rig and sails, and performance was dramatically enhanced without compromising historical authenticity. Leading naval architect Gerard Dykstra of Dykstra Naval Architects was a major influence on the successful completion of the project, which included the returning of her deck structures and rig to their original 1930s configuration and improvements to the interior layout. Shamrock participated in a reunion in August 2001 with Endeavour, the only other remaining America’s Cup challenger, and Velsheda, for the America's Cup Jubilee off Cowes. Since then, Shamrock has enjoyed success racing on the classic and superyacht circuit, as well as being a popular charter yacht for cruising and racing.

‍ Racing in St Barth’s in 2017, Shamrock sustained significant structural damage and in 2022 was acquired by her current owner who has commissioned a comprehensive strip down and restoration ‘to prepare her for her next 100 years’. Work is well underway, with a planned relaunch early in 2024, Shamrock plans to return to the Mediterranean to take part in the J Class World Championship during the 37th America’s Cup in Barcelona.

‍ Shamrock is the only original J-class never to have fallen into dereliction.

Length at waterline

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spinnaker sail area

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J-Class – the Ultimate Sailing Yacht Charter

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By Editorial Team   9 October 2014

There is nothing quite like the thrill of wind under sail as a fleet of magnificent sailing yachts race against one another in a spectacular display of classic grandeur and regattas such as the Les Voiles de St Tropez each year bring attention to the beauty of sailing of this kind.

The J-Class has its roots roots firmly cemented in the history of yachting, representing the fine pedigree of regatta racing yachts and the high-spirited comradery and competition that goes alongside them. This year the Le Voiles de St Tropez welcomed more than 4000 sailors and some 400 sailing yachts made up of both classic and modern vessels, for a week of racing, social activities and all-round appreciation for these magnificent yachts.

For those who want to experience the high-octane action of a regatta charter or the majestic feel of a sailing yacht of this calibre, all is possible with a J-Class charter yacht.

The 42m/136ft RANGER this year made a clean-sweep of all four St Tropez races, taking the final finish line from under the nose of the 1933 Camper & Nicholsons built VELSHEDA. RANGER is in fact a 2004 replica of the original 1937 America’s Cup winner which was owned and skippered by one of the most significant figures in the Golden Age of yachting, Harold Vanderbilt.

For those who want to experience the high-octane action of a regatta charter or the majestic feel of a sailing yacht of this calibre, all is possible with a J-Class charter yacht. Built in 1930 by Camper & Nicholsons, the 36m/118ft superyacht SHAMROCK V boasts a long and prestigious career on the waves. Since her launch she has been extensively rebuilt by some of the world's greatest yachtsmen and women, ensuring she continues to offer exceptional comfort alongside her world-renowned performance.

Elegantly fitted out in traditional style with all the comforts you would expect of a modern yacht, SHAMROCK V successfully blends luxury with classic charm. She sleeps up to eight guests in four generous staterooms and plays host to a full-time crew who race her competitively on the classic yacht circuit. She is available for both regatta charters and leisure charters in the Mediterranean , creating an unforgettable vacation, whether cutting through the waves at speed or anchored serenely in one of the world’ most spectacular destinations.

The original Herreshoff built RAINBOW was launched in 1934 and won the America's Cup against Endeavour in the same year.

In contrast, the 39m/128ft Holland Jachtbow sailing yacht RAINBOW represents a more modern version J-Class. The original Herreshoff built RAINBOW was launched in 1934 and won the America's Cup against Endeavour in the same year. RAINBOW JH2 was re-designed by Dykstra Naval Architects according to the original design of William Starling Burgess, but now constructed in aluminium with carbon mast and rigging and 3-DL racing sails.

Although she benefits from the latest in sailing yacht design and technology, her interior has been sympathetically styled to encompass a traditional J-Class feel. Glossy mahogany combined with fine fabrics and art deco details, accommodating up to six guests in three spacious cabins. RAINBOW is the perfect choice for those who want to enjoy cutting-edge sailing performance in a classic ambience.

For more information about booking a charter vacation on board one of these incredible sailing yachts, contact your preferred yacht broker . See all classic yachts for charter .

J-Class Yachts Available for Charter

37m Camper & Nicholsons 1930 / 2024

40m Holland Jachtbouw 2012 / 2016

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J Class Yachts For Sale (Sail)

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Building a J Class Model

By john hanks iii.

Now you may be wondering what is involved in building a model of a J Class yacht. I will give you an idea of what is involved in getting your J model in the water.

To begin with, let me say that you will need to do some scratch building to get your J model completed, regardless which yacht you choose to model. The scratch building will involve the deck, the rig, and probably the hardware associated with the mast, boom and rigging. With that said, you will need to decide which yacht you would like to model. In the full size J Yachts there was a definite advantage associated with which hull was in the water, but with the models, it appears that any of the J designs will make a good fast sailing model, if it is built correctly. So your decision should be driven by your personal preference for a particular boat. Once you decide which yacht you would like to model you will need to either buy a fiberglass hull or get the drawings for your chosen hull.  There are hull line drawings available in the proper scale for all of the J's as well as some deck plans. You can get line drawings from several of the maritime museums, such as the Mystic Seaport Museum.

The amount of time that you will spend on building your model will vary with your building ability, whether you start with a fiberglass hull and how much detail you want to put on your model. Should you decide to scratch build the entire model with a lot of detail, you should plan on spending about 500 to 550 hours building your model. If you begin with a fiberglass hull, subtract about 150 hours, if you do not want to detail your model, deduct about another 100 hours. The cost of materials will be about $800 to $900 if you decide to completely scratch build your model.

I will begin the actual building process with a plank-on-frame hull. You can skip these steps if you start with a fiberglass hull. The process for completing the remainder of the model will be the same from that point on.

To begin the building process, you will need to get your drawings ready by extending each frame to a “waterline” that is above the deck line on the drawing. This new “waterline” will be the part of the frame that rests on the building board. The new “waterline” gives you a flat plane so that all of the frames are referenced to the building board surface, while allowing the arc of the sheer at the deck line to maintain its shape. Your modified drawing should show the hull shape, the shape of the deck beams, and the building board surface.

You will begin the building process by building a building board. The easiest way that I have found to do this is to buy an 8 foot long 4”x6” and mount it at a convenient building height on 2”x4” legs. You will need to make sure that the 4”x6” plank is straight and true and that it will stay that way through out the building process, as this will determine the trueness of your model.

Mark a centerline on your building board and then mark all of the station locations on the centerline. You will then need to draw a line perpendicular to the centerline at each of the station locations. You will next attach small blocks (approximately 1-1/2 x 1-1/2 x ¾  inch) to the building board on the centerline and aligned with the perpendicular station lines. The blocks need to be placed so that the frames that will be glued to these blocks will be centered on the perpendiculars.

The next step will be to cut out the frames that will form the hull. For this step you will need to keep in mind the difference between the line drawings for a metal hull versus a wooden hull. The drawings for a metal hull show the frames to the outside of the plating and for a wooden hull, they are to the outside of the framing, not the hull planking. This will make a difference in your model, as all of the Js were metal boats, and if you draw your frames to the lines, your model will be oversized by the thickness of your planking.

I use 1/8 inch Luan plywood for the frames. The plywood comes in a 4’x8’ sheet and I can get all 28 to 30 frames from one sheet of plywood. The frame patterns are cut from your drawing, and each frame pattern is traced on the wood. With careful placement you should have no trouble getting all of the frames traced onto the plywood. You will need to draw the cutouts for the keel, inwales and king plank in the frame tracings. The centers of the framed are also cut out so that you end up with a ring of wood that is about ¾ inch from the outside to the inside of the frame. 

When I cut my frames I do not try to cut on the line that I have drawn; I am not that good with the saw. I leave a little wood, about a 1/16 inch next to the line and sand the frame to the final shape. I find that this makes it much easier to control the accuracy of the frame shape. Once all of the frames are cut and notched for the keel and inwales, they are glued to the blocks on the building board. At this point you should be able to sight down the frames and get a good idea of the shape of your hull.

With the frames glued in place, you are now ready to install the keel and the inwales. I like to use ¼ inch birch plywood for the keel and 1/4x1/4 inch square for the inwales. The inwales can be cut from the same material that you will use for the planking. The hull framing is very limber at this point but it becomes very ridged once the keel and inwales are in place.

The hull is now ready for planking. I have used pine, bass, aspen, spruce and alder for planking. All work well. The availability and price of the material is what determines which material I use. When I built my first J some 30 years ago, clear pine in 8 foot lengths was plentiful and inexpensive. Since then, it has become hard to find and very expensive. As a result I have used other woods that were available, hence the bass, aspen, spruce and alder. The planking material is cut into strips that are about 5/32 inch thick and 3/8 inch wide. This is a nice working size, as the planks are limber enough to form to the hull without the need for spiling (tapering), wetting, or steaming them. You will start the planking at the first frame and end at the last. The 2 to 3 inches of hull that remain at the ends will be filled with solid wood blocks shaped to the dimensions of the hull. Begin planking your hull at the sheer and work to the keel. Each side of the hull will require about 50 to 60 planks. Remember that you will need to alternate sides of the hull as you plank so that you keep the stresses equal on both sides of the hull, thus preventing distortion in the hull. 

You will need to change direction of the planking when you get to the bilge area of the hull. The planking will take on an increased twist towards the stern that will prevent the planks from laying fair. The planks will tell you when you have reached this point, usually about 15 to 20 planks up on the hull. To overcome this you will need to lay a plank in a straight line along the hull so that it lays flat between the areas where the existing planking meets the keel. This will leave a lens shaped gap of about 4 or 5 inches between this plank and the existing planking at the middle of the hull. Fill this area by planking from the new plank that you laid down to the existing planking. Once you have completed that step, then continue to plank the rest of the hull. When you have finished your planking, you are ready to attach the bow and stern blocks, shape them, and sand the entire hull to get it ready for fiber glassing.

I like to build the rudder next and fit it to the hull. I build the rudder as I would build an airplane control surface, with a leading edge spar, three ribs, and a trailing edge. The framework is then covered with 1/32 inch plywood. The square tube that accepts the 5/32 inch brass rod rudder shaft is installed in the leading edge as well as the pivot pin at the bottom of the rudder. The hull is drilled and the rudder log is installed and the rudder is fitted in place. Once the rudder is fitted and works well, the hull is fiber glassed using a single layer of 6 ounce cloth and three to four coats of resin. Each coat of resin is sanded before the next coat is applied. When the sanding is complete you will have a smooth and fair hull that will look great when it is painted. The hull is now ready to be removed form the building board. At this time, you should also have a stand built and ready to accept the hull. 

Once the hull is off of the building board, it is time to seal the inside with epoxy and install the mechanical workings in the hull as well as install any reinforcements that are needed, such as at the chain plates, mast step, and sheet exits. From this point on, the building process is the same for the fiberglass hulls once you have the deck beams in place. This is also the time to lay out the hatch openings. When laying out the hatch openings you want to keep them as small as possible and still be able to do any work inside the hull that is necessary. Nothing is more frustrating than to find out that you cannot reach some part of your equipment once the deck is in place, so be sure that you can work on and remove and replace all of the fittings, winches, ballast, etc., through the hatch(s) that you have framed in your deck. 

Building the deck is the next big step in getting your J ready to sail. There are several different ways to build your deck, and your decision on how much scale detail you want on your model will drive part of that process. If you want a slick deck with no scale detail, then a simple plywood deck will do. The 1/8 inch plywood will be more than adequate for the job and can be finished so that you have a very good looking wooden deck on your model. 

Another option is to build a plank deck that represents the deck on the full size yacht. If this is your preference, then you begin by cutting the deck planking to the same dimensions as the hull planking. I cut my planks to a length of 15 inches so that I have scale 20 foot planks. To simulate the deck caulking, I use black construction paper glued between the planks. Once you have the planking cut, you will need to lay the king plank down the center of the deck and the water way planks down each side of the hull. All of the Js had the planking run parallel  to the edge of the hull, so you will need to begin laying your deck from the edge of the hull, and work to the center. The paper between the planks helps the glue, thin CA, flow and form a good bond at the seam. From this point on you just continue your planking until the deck is completely covered. As you build your deck you will need to cut your planking at the hatches so you will have access to the inside of the hull when you have finished your planking.

When the deck planking is complete, you will sand the whole deck and get it ready for finishing. At this point, you should have a great looking model. 

Again your decision on the amount of detail that you want on your model will determine your next step. If you opt for a scale appearance, by this time you will need to make the cabins, deckhouses, winches, cleats, and anything else that goes on the deck.

The hull is now ready for finishing. I use non-water-based, clear gloss, polyurethane on the deck, cabins, and spars and automotive acrylic enamel for the color on the hull. These make very nice durable finishes which should last many years on your model. I chose to use polyurethane because it does not yellow like varnish does as it ages. This is a personal choice driven by how you would like your deck to look as it ages.

At this point you will have to ballast your model. I have found that the easiest time to do this is after the model is painted and has the scale waterline in place. Place your model in a swimming pool or other suitable tank, and place the lead in the hull until the hull sits on the waterline that is painted on the hull. You will need about 60+ pounds of lead in a manageable form, about 5 pound pigs, for this exercise. Once the lead has been placed in the hull and the proper trim established, you will need to note where the lead is in the hull and the amount at each location. You can then remove the lead from the hull and using your notes, make molds for the ballast so that it fits into the hull cavities. 

The next step is building your rig. The masts for the J models will be anywhere from 8 to 91/2 feet tall, depending on which boat you are building and how you lay out the sail plan. For support, the mast will need at least two sets of spreaders with accompanying side stays, and a diamond stay. I have used both aluminum and wood to make J masts. The last mast that I built was made from spruce and was 109 inches tall, with a tear drop cross section that measured about 1-1/4 x ¾ inches. The mast was tapered in its top 3 feet and had a bolt rope slot cut in it used to attach the main sail to the mast. The mast was made from two pieces of spruce that were glued together on the centerline with the grain in each piece set so that any warps canceled each other out. The result was a stiff spar that weighed about 1-1/2 pounds ready to step on the deck Extruded aluminum masts are also available in lengths up to 10 feet, from Ludwig Manufacturing. These masts have a bolt rope slot molded in them and are both light, about 1 pound for a 10 foot piece, and stiff.

The main boom and jib club were both made from spruce. The jib club was about 33 inches long and 1x1/2 inch in cross section and tapered to 1/2 x1/2 inch at both ends. The main boom was about 45 inches long and was about 1 inch from top to bottom with a scale cross section that resembled an old wine jug. These shapes were made for a model of Rainbow.

The gooseneck attachment was made for a piece of ¼ inch thick aluminum plate and secured in a slot cut into the base of the mast. The gooseneck and boom vang pivot on a single stainless-steel rod, (welding rod) about 3 inches long. The boom can be removed from the mast by simply pulling the pivot pin; then the gooseneck and vang are released. The sail can then be slid down out of the bolt-rope slot and rolled for storage.

This is a quick overview of the building process that is needed to build a model J boat. 

Below is a list of most of the materials that were used.

2 – 1”x8”x8’ pine, aspen, bass or other suitable wood that can be cut into 5/32”x3/8” strips for hull and deck planking

1 – 4’x8’x18” plywood used for hull framing, 2 if you are using one for the deck

1 – 1’x4’x1/4” five ply birch plywood for the keel

1 – 1’x2’x1/32” plywood used for the rudder sheeting

1 – 1”x4”x8’ spruce for the mast and booms (optional if you are using an aluminum mast)

4 – ¼”x12”x.030” brass strap used for chain plates, mast, and boom fittings

1 – 1/8”x3’ stainless steel welding rod used for gooseneck pivot and spreader stubs in the mast

1 – 1’x6”x1/4” aluminum plate used for the gooseneck and vang fitting (use only if you are scratch building the fittings

1 – 5/32”x12” brass round tube used for spreader bases

1 – 3/16”x12” brass rod used for the rudder shaft

1 – 7/32”x12” brass round tube used for rudder log

1 – 3/16’x12’ square brass tube used for the rudder shaft socket in the rudder

60+ pounds of lead used for ballast

4 – 8oz bottles of thin CA used for planking the hull and deck as well as general construction

 1 – 2oz bottle of medium CA for general construction

32oz of 30 minute or longer set epoxy used to seal the hull interior

1 – 10’x50” 6 oz fiberglass cloth used to cover the outside of the hull

2 – Quart cans of polyester resin with catalyst used with the fiberglass cloth

6 to 8 – 2” disposable brushes used to apply polyester resin

8 – Turnbuckles used for the side stays, boom vang and diamond stay

36 – 1-72x 1” stainless steel machine screws with nuts and washers used for various attachments

90’ – 60 pound test nylon coated stainless steel fishing leader with swages used for the standing rigging

8 – Single blocks used for back stay, winch arm, up haul and rudder control

1 – Spool of 40 to 60 pound test braided Dacron line for the sheets

12 – Bowsies for various rigging adjustments

Reference Information

Reference book: Enterprise to Endeavour by Ian Dear, ISBN 1-57409-091-7

This covers most of what you would need to build your J model. I did not mention the wood or brass that I used to make the scale detail, as most of it was obtained as scrap from a cabinet shop and salvage yard. Some additional things that you will need are a radio (at least 2 channels), a quarter scale servo for the rudder, and a sail winch, either arm or drum with about 3,000 inch ounces of pulling power. You would also need to order your sails from your favorite sail maker.

I hope that this answers most of your questions about what it takes to build a model of a J Class yacht. By the way the process described above applies to scratch building any R/C model sail boat, the only difference is the scale of the project. Good luck with your building project

AMYA J CLASS

1330 North Andrew Drive, Kuna, Idaho 83634, United States

Copyright © 2022 AMYA J CLASS - All Rights Reserved.

Published on September 15th, 2024 | by Editor

How it all began for the J/24 Class

Published on September 15th, 2024 by Editor -->

At the 2024 J/24 US National Championship held at Fleet #1, founders John Gjerde, Rolf Turnquist, Dale “Dirtball” Anderson, and the Wayzata Yacht Club were honored with the J/24 Lifetime Achievement Award presented by Jeff Johnstone, President of J/Boats. The J/Boats newsletter relives how the J/24 Class got underway:

On December 1976, a small group of die-hard sailors from Lake Minnetonka, Minnesota learned of a new 24-foot design that had just dominated the eastern Long Island Sound series in Connecticut. The original RAGTIME had won 15 of 17 races sailing with a crew of Mom, Dad, and four kids under the age of 16. The new boat was going into production as a one-design. That new boat was the J/24.

John Gjerde and Dale “Dirtball” Anderson got on the phone with designer Rod Johnstone, peppering him with questions about specs, one-design rules, the builder, you name it. Rod recalls those first conversations, and how reaffirming it was to have such passionate validation of the J/24 and one-design keelboat sailing.

Less than a month later, John Gjerde and Rolf Turnquist went into partnership and ordered the first boat (Hull #7 OZ). Soon four more were ordered, and with an impressive five out of the first 25 J/24s ever built, J/24 Fleet #1 was born on Lake Minnetonka.

In 1978, Oz was towed by John, Rolf, and Dirtball for the inaugural J/24 North American Championship (Newport, RI), proudly representing Fleet #1 and the Wayzata Yacht Club. They helped set the tone early in the J/24 class for fun, highly competitive racing, and even more fun times onshore.

In those first years, with the class exploding in size, most clubs didn’t know what hit them – how to deal with non-stop general recalls, how to deal with teams sleeping on their boats and bringing campers, how to deal with sailors hanging out at the club all night until the kegs ran dry. The J/24 class was more like a rolling Woodstock Music Festival. While John and Dirtball are no longer with us, their contributions to the J/24 class and one-design sailing will never be forgotten. Rod Johnstone recalls an early John Gjerde story that captures the spirit well. After that first season in 1977, John wanted to ramp things up and invited Rod to Minneapolis in late January 1978 (a few weeks after the first 1978 J/24 Midwinters in Key West – won by Mark Ploch’s TCHAU with Stu Johnstone as tactician!) to speak to a packed house.

A conference room was booked at a downtown hotel and 100+ people were invited to hear the latest about the J/24. Rod got stuck at LaGuardia airport in a snowstorm and couldn’t make it and had to cancel. When Rod spoke to John a few days later, he learned that the party went on anyway. Everyone showed up and all night long John, as a joke proudly wore a name tag that read “Hello my name is Rod Johnstone.” Fleet #1 doubled in size in 1978!

Wayzata Yacht Club’s adoption of the J/24 fleet in 1977 helped establish a one-design culture that has, in the years since, spawned an impressive number of other recognized one-design fleets, including J/22 fleet #1 and J/70 Fleet #2. And now, the Wayzata Yacht Club’s Thursday Night summer series draws upwards of 120 boats with no less than seven active one-design fleets.

The inscription on the framed half-model award reads: “In honor of J/24 Fleet # 1 founders Dale Anderson, John Gjerde, Rolf Turnquist, and Wayzata Yacht Club – for their unwavering support, enthusiasm, and lifelong dedication to the J/24 Class and one-design sailing.”

Above photo : Receiving the award (from L to R) was Andy Spence-Parsons (Former Commodore WYC), Rolf Turnquist, and Jeff Johnstone. The inscription reads: “In honor of J/24 Fleet # 1 founders Dale Anderson, John Gjerde, Rolf Turnquist, and Wayzata Yacht Club – for their unwavering support, enthusiasm, and lifelong dedication to the J/24 Class and one-design sailing.”

Tags: J/24 , J/24 US Nationals , J/Newsletter

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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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Endeavour Sailing Yacht Charter

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If you have any questions about the Endeavour information page below please contact us .

Sailing yacht ‘Endeavour’ is a 130 foot J Class classic sailing sloop which was launched in 1934 and embodies one of the most formidable and famous sailing yachts in the world. Following her 2011 refit, she is in an ‘as new’ condition and is ready and waiting to give you the exhilaration of the powerful sailing of yesteryear. Her high sailing performance is matched only by her truly elegant interior accommodations and extremely high standard of craftsmanship, catering, service and facilities.

Sailing yacht Endeavour has now been almost entirely rebuilt in such a way that her quality of workmanship and sleek lines are entirely consistent with her original condition. She does, however, boast the recent technology and increased performance of a modern yacht. She has a powerful engine and generators as well as bow thrusters, an aluminium mast and boom, hydraulic winches and a water-maker and all the latest electronic entertainment and navigation and equipment one could desire.

Endeavour's saloon and dining area is an amazingly memorable space for charter guests to relax and entertain. Her interior joinery is American Cherry wood raised panels, nickel plated fixtures and locust sole.

The crew of classic charter yacht Endeavour are professional and amongst the best in the business. They include the captain, first mate, engineer, chef, steward, stewardess, as well as three deckhands. The fantastic friendly crew will pamper you with first-class service and absolutely fabulous cuisine during your yacht charter. As a lady who has been brought into the contemporary world, Endeavour provides all the modern electrical entertainment systems and yacht water toys. Have you ever helmed just a famous, powerful and impressive classic yacht? It will be no problem if you wish to spend most of your day helming the greatest yacht in the world, the mighty Endeavor under full sail!

Endeavour Specifications

Sailing yacht Endeavour has been awarded the best Refitted yacht at the 2013 World Superyacht Awards and her extensive 18month refit, which concluded in October 2011, included the replacement of the complete weather deck, new deck equipment, relocation of steel deck framing, reconfiguration of the accommodation forward and new interior.  The main engine, electrical system, electronics, air conditioning, hydraulics bow thruster and winches were all replaced.  A new carbon fibre mast was built by Southern Spars and the new interior was built in house by Yachting Developments tradesmen.  Dykstra & Partners, Naval Architects, have been instrumental in the design of the new sail plan, deck layout, and structural engineering. The interior was collaborated by John Munford and Adam Lay Design Studios to ensure the originality of the boat was maintained.  Care was taken throughout the refit to preserve as much of the vessel as practical, yet still enhance performance and improve functionality.  

Yacht Accommodation

Classic Sailing yacht Endeavour is remarkably comfortable with accommodation for up to eight guests in four staterooms - two with queen berths, one with a king berth and one with twin berths. The staterooms adjoin their own baths with lovely heated towel bars and nickel plated shower enclosures. Endeavour’s master bathroom also features an over-sized bath tub.

Amenities and Extras

Luxury classic sailing yacht Endeavour offers the following amenities for your yacht charter vacation: a Zodiac Mark 2 tender with a 25 h.p. out-board engine, two wind-surfers, a dive compressor and a water maker. In the yacht’s Saloon is a 25 inch TV with VCR and an N.A.D. music system with a CD player and there are both indoor and outdoor speakers, a large library of CDs movies etc. Her Master stateroom also provides a Hi Fi music system with a CD player. Sailing yacht Endeavour is fully air conditioned throughout the interior in all of her staterooms. The yacht has up to date modern communication and navigation electronic equipment.

Endeavour Disclaimer:

The luxury yacht Endeavour displayed on this page is merely informational and she is not necessarily available for yacht charter or for sale, nor is she represented or marketed in anyway by CharterWorld. This web page and the superyacht information contained herein is not contractual. All yacht specifications and informations are displayed in good faith but CharterWorld does not warrant or assume any legal liability or responsibility for the current accuracy, completeness, validity, or usefulness of any superyacht information and/or images displayed. All boat information is subject to change without prior notice and may not be current.

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Camper & Nicholsons became known for its fast, wooden racing sailing yachts, which included the famed J-Class sloops that competed in the America’s Cup Races of the early 20th century, including two J-Class boats commissioned by Sir Thomas Sopwith, Endeavour and Endeavour II.

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Home  News  Legendary Rolex Big Boat Series Kicks Off in San Francisco

Legendary Rolex Big Boat Series Kicks Off in San Francisco

Big breeze. Epic scenery. Yachts of all shapes and sizes. The glitz and glamor of Rolex.  

In the sailing world, the Rolex Big Boat series holds a certain allure and prestige. Held each September in San Francisco Bay – when conditions

are at their windiest – the event features both one design keelboats (J/88, j/105, and Express 37) and handicap rated yachts across multiple rating systems.

This year, over 70 boats will take to the line September 12-16 for the 60th edition of the event, with organizers showcasing its rich history and celebrating the many legendary yachts, crews and skippers who have participated since 1964.     

Since then, the event has grown to include new boats and technology alongside the classics. Ratings for each boat are supported by US Sailing’s offshore office, making sure boats of different makes and sizes can compete against each other fairly.

This year’s event will also serve as the ORC West Coast Championship, with the top three positions in each ORC Class awarded titles and trophies. Additionally, entries are invited to compete for the Storm Trysail Team Trophy, to be presented to the top-scoring three-boat team from the same yacht club and comprised of one ORC boat, one one-design boat and one boat from any other class.

The festivities begin on Wednesday evening, September 11, when boats and sailors arrive for the Competitors’ Briefing. Competition commences Thursday with two races per day for most fleets through Saturday. On Sunday, all fleets will race one long “Bay Tour” course. The Classics will race once per day for all four days.  

Learn more about the Rolex Big Boat Series: https://rolexbigboatseries.com/  

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Yachting World

• Digital Edition

World’s coolest yacht: J Class Topaz

• Elaine Bunting
• February 3, 2022

We ask top sailors and marine industry gurus to choose the coolest and most innovative yachts of our times. Former world No 1 match racer Pete Holmberg nominates J Class Topaz.

“I’ve climbed a lot of mountains so choosing the coolest is a tough one, but it has to be the J Class Topaz . I love what we are able to do, to bring it back and sail to a high level, combining history with modern technology.

“Figuring out how to manoeuvre this thing properly, accurately, and do it right, is the ultimate challenge. But we put it right in there; when we’re racing, we’re metres apart in these big things.”

Topaz, Frank Pain/Hoek Design, Holland Yachtbouw, 42,7m. Photo: Sailing Energy / SYC

Holmberg is the racing helmsman on Topaz, J8, one of the most recent of the J Class yachts. She was built to a Frank Paine design from 1935, optimised by Hoek Design, and launched in 2015. Under Holmberg and her race crew, performance and results have steadily been improving. She won over Velsheda at the Superyacht Cup in June.

Holmberg says the addictive thing about the Js is that they are a challenge to handle, being slow to respond and with a race crew of over 30, and they will punish any mistake.

J Class Topaz Stats rating:

Top speed : 12 knots LOA: 42.7m Launched: 2015 Berths: 15 Price: $20-30m Adrenalin factor: 80%

Pete Holmberg

Peter Holmberg, 58, is one of the world’s top sailors. From the US Virgin Islands, he is an Olympic Silver Medallist in the Finn Class, and former world No 1 match racer with a wealth of elite level racing including three America’s Cup campaigns, memorably helming Larry Ellison’s BMW Oracle for part of the 2002 America’s Cup campaign in New Zealand. He is in demand as a professional sailor and sailing consultant.

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Circolo Vela Torbole (Lake Garda) to host the first-ever J/70 Mixed Plus World Championship in 2025

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