Claasen Jachtbouw have launched the 44 metre J-Class sailing yacht Lionheart.
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Written by Mike Smith
The J-Class sailing yacht Lionheart is the first of a new breed of aluminium J-Class yachts which are are built to a Hoek yacht designs at Holland’s Claasen Jachtbouw shipyard. One of the leading offices in classically styled sailing yachts, Hoek Design is intimately involved in the revival of these magnificent yachts from the 1930s.
Sailing yacht Lionheart incorporates two small separate deckhouses and cockpits – one of which is designed especially for the yacht’s owner and guests. This feature gives extra versatility for both racing or cruising the superyacht.
The J-Class Yacht Lionheart
When delivered Lionheart will be the largest J-Class superyacht in existence, with 17m overhangs on an LOA of 43.4m. ABS classed and MCA compliant, she will be able to accommodate eight guests in four cabins.
Hoek Design has developed specific Velocity Prediction Software for J-Class yachts in partnership with Piet van Oossanen of wing keel fame. This highly sophisticated Velocity Prediction Program (VPP) has been developed specifically for these craft, and was calibrated using tank test data from a six-metre long model of a J. The aerodynamic part was calibrated with wind tunnel test data. “In contrast to other types of software, our VPP software is capable of calculating rudder angles as well as predicting performance in waves,” Andre Hoek explains. “This enables us to also optimise helm balance.”
Yacht Lionheart a J-Class Sailing Yacht
Originally designed for the Ranger syndicate by Starling Burgess and Olin Stephens, Lionheart is the first yacht to be built based upon this research. Under construction for a repeat customer of Hoek Design, she will be the largest J afloat when launched. Tremendous 17-metre overhangs on a LOA of 44 metres have created a fascinating super J with a maximum waterline length.
The J Class Sailing Yacht lionheart Delivered
Hoek: “We extensively optimised Lionheart’s structure using 3D structural modelling techniques with finite element software programs. The complete hull structure was analysed for stiffness and torsion, and her stiffness compared to the steel original. The weight of the hull structure was also further optimised, while the hull was developed in high tensile Alustar plating and extrusion materials to provide even greater stiffness. We also carried out extensive research into the mast position, and sail area vs. handicap in order to create a yacht that would perform to her best on the race course.”
Please contact CharterWorld - the luxury yacht charter specialist - for more on superyacht news item "Claasen Jachtbouw have launched the 44 metre J-Class sailing yacht Lionheart.".
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Claasen Jachtbouw
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39M TRULY CLASSIC 127 SUPERYACHT
Video: Claasen Shipyards
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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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The Lionheart yacht, built by Benetti Yachts, is owned by billionaire Philip Green. Constructed of steel and aluminum, the yacht features a diesel-electric propulsion system powered by Caterpillar engines. With an estimated value of $150 million, the yacht can accommodate 12 guests and a crew of 30. Interior design by Green and Mingarelli ...
Award winning. Sleeps 8 overnight. The award winning 43.4m/142'5" sail yacht 'Lionheart' was built by Claasen Shipyards in the Netherlands and she was delivered to her owner in August 2010. This luxury vessel's exterior design is the work of Hoek Design and she was last refitted in 2020.
Lionheart in Monaco in 2017. The current 90-metre (300 ft) yacht, Lionheart, is the third yacht commissioned by Philip Green and built by Benetti Yachts (project FB262). [1] Contracts were signed in 2012, and the yacht features a steel hull and an aluminum superstructure.
Lionheart is a 43.40-metre aluminium J-class yacht built in 2010 for cruising and racing. She has two deckhouses, two cockpits and a MCA compliance, and is the first J-class yacht with an aluminium hull.
Hoek-designed 43,40m (142ft) sailing yacht Lionheart is the first of a breed of aluminium J-Class yachts, with a refit by Pendennis is 2015 and another on in 2019/2020 by Huisfit at Royal Huisman. Originally designed for the Ranger syndicate by Starling Burgess and Olin Stephens, superyacht Lionheart was launched in 2010 as the largest J afloat
LIONHEART, a 43.4 m Sail Yacht built in Netherlands and delivered in 2010, is the flagship of Claasen. ... She is one of 141 sailing yachts in the 40-45m size range. LIONHEART is currently sailing under the Netherlands flag (along with a total of other 83 yachts). She is currently located at the superyacht marina Porto Maurizio, in Italy, where ...
Lionheart is a sailing yacht with an overall length of m. The yacht's builder is Claasen Shipyards from The Netherlands, who launched Lionheart in 2010. The superyacht has a beam of m, a draught of m and a volume of . GT.. Lionheart features exterior design by Hoek Design Naval Architects B.V.. Up to 8 guests can be accommodated on board the superyacht, Lionheart, and she also has ...
The J-Class sailing yacht Lionheart is the first of a new breed of aluminium J-Class yachts which are are built to a Hoek yacht designs at Holland's Claasen Jachtbouw shipyard. One of the leading offices in classically styled sailing yachts, Hoek Design is intimately involved in the revival of these magnificent yachts from the 1930s. ...
Lionheart is designed to race and charter at the same time, so she was built with the MCA classification in mind. She will be one of very few J-Class yachts available for charter, as most do not qualify for commercial yachts. Lionheart was the first J-Class yacht to receive a two superstructure deck layout.
LIONHEART is in the top 5% by LOA in the world. She is one of 35 motor yachts in the 90-100m size range, and, compared to similarly sized motor yachts, her cruising speed is 0.95 kn above the average. LIONHEART is currently sailing under the Malta flag, the 3rd most popular flag state for superyachts with a total of 1109 yachts registered.
J-class yachts. Lionheart's hull is built in high tensile Alustar plating and extrusion materials, and she employs horizontal stringers to ensure maximum stiffness. SY LIONHEART Lionheart, completed by Claasen in 2010, was the first J-class yacht with an aluminium hull. With a length of 43.40 metres, she was also the largest so far. HIGH UP WIND,
Lionheart is a modern replica of a 1937 design by Burgess and Stephens, optimised for performance and comfort. Learn how the designers used research, CFD and FEM to create a high-performance J Class yacht that meets the JCA rules.
Lionheart is a 43.4 m / 142′5″ luxury sailing yacht. She was built by Claasen Jachtbouw in 2010. With a beam of 6.55 m and a draft of 4.57 m, she has an aluminium hull and aluminium superstructure. She is powered by Volvo Penta engines giving her a maximum speed of 11.5 knots and a cruising speed of 10 knots. The sailing yacht can accommodate 8 guests in 4 cabins. The yacht was designed by ...
Superyacht Lionheart, belonging to billionaire Philip Green, is part of his pride and worth $150 million. Joining the other sailing wildcats, the 63-meter Lioness V and the speedy Mangusta 108, named Lion Chase, is this sleek Benetti boat with a plethora of impressive features. The 295-footer sleeps 12 guests in 6 cabins serviced by a crew of 30.
Sir Philip Green, the 'King of High Street', is a British billionaire based in Monaco with an empire in the clothing retail industry. The Green family owns several luxury yachts, including Lionheart, Lioness, Lionchase, and the Van Dutch tender Lion Cub. Sir Philip's Arcadia Group is a significant player in the British clothing retail ...
The award winning 43.4m/142'5" sail yacht 'Lionheart' was built by Claasen Shipyards in the Netherlands and she was delivered to her owner in August 2010. This luxury vessel's exterior design is the work of Hoek Design and she was last refitted in 2020.
Based on a never-before-built alternate design by Starling Burgess and Olin Stephens II, considered for 1937's America's Cup defender RANGER, LIONHEART is the first of a new breed of aluminium J-Class yacht based on the latest research of hoek Design and built at the Bloemsma Aluminiumbouw yard with Claasen Shipyards Bv. the longest J-Class ...
The owner then informed Hoek he'd like to build a new yacht based on that design. Warm, teak paneling lines the bulkheads, and nothing is fussy or overstuffed. Measuring 43.4 meters (142 feet), Lionheart is the longest J Class in existence. She also has astounding 17-meter (56-foot) overhangs. She's built entirely of aluminum, something the ...
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. ... 2014 Maxi Yacht Rolex Cup. Lionheart wins. 2015 J Class Falmouth Regatta. Lionheart wins. 2015 RYS Bicentenary Regatta Cowes. Lionheart 2nd.
We are renowed for building large custom made luxury yachts: catamarans, power boats and superyachts. We design, build and charter yachts from 60 up to 200 feet.. ... Sunreef Yachts is the world's leading designer and manufacturer of luxury sailing and power multihulls. Each catamaran, motor yacht, and superyacht built is a bespoke creation ...
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