Over its 40-year history, Heesen has developed a reputation for building cutting-edge superyachts that have pushed boundaries in design, speed and efficiency. From record-breakers such as Octopussy to more recent innovators such as Galactica Star, Galactica Supernova and Home, Heesen’s facility in Oss continues to play host to remarkable superyacht projects.
The latest project to draw on this extraordinary heritage is Cosmos, an 80.7 metre aluminium superyacht that is set to push the boundaries even further. With a designed top speed close to 30 knots and an efficient cruising speed in excess of 20 knots, Cosmos will use a development of the Fast Displacement Hull Form (FDHF) coupled with innovative construction and advanced propulsion solutions to set new standards for large aluminium yachts. Although the keel-laying ceremony is due to take place later this year in May, this is not the start of the project – indeed, an extraordinary amount of design and testing has already been undertaken and completed.
The proof-of-concept and testing process has comprised several stages, starting with the base naval architecture of the vessel and its hull form, progressing through extensive computational fluid dynamics (CFD) work and physical tank testing of a scale model, and culminating with the design of the propellers and rudder system. For these aspects, Heesen has drawn not only on the expertise of its in-house design and engineering department but also that of long-standing partners Van Oossanen Naval Architects, and propulsion specialists at Rolls-Royce.
The first stage was to develop the FDHF concept and ensure not only that Cosmos benefitted from the efficiency and speed gains of the design, but also that the yacht could retain inherent stiffness – a challenge because Cosmos features all-aluminium construction in order to achieve the client’s desired maximum speed of close to 30 knots. The solution was for Heesen to develop the Backbone® – a method of construction that could deliver the required stiffness in the yacht without adding weight that would have impacted on the yacht’s performance. Such has been the success of the design that the Backbone® has now been patented.
A 3.7m scale segmented model of the yacht was built to use in physical tank tests at the Wolfson Unit in Southampton. After initial data on hydrodynamics, resistance and speed had been gathered, the model has been radio-controlled and self-propelled in order to measure the various bending forces acting within the hull and to prove the Backbone® concept. That provided valuable data for fine-tuning the structural design and to further optimise the construction method.
For such a large aluminium yacht, it is particularly important to know the real forces created by the sea on the hull, not just to meet Lloyd’s Register requirements but to exceed those and construct the boat to the highest loads that could be encountered.
Using the FDHF design and the Backbone® for such a large aluminium yacht requires a slightly deeper keel depth, but this actually brings further benefits. Due to the slightly increased draft Project Cosmos has a very low block coefficient, which means that the underwater body is very slim with nice verticals in the aft ship area, for an optimal flow of water towards the propellers. This results not only in improved performance but also in higher efficiency, ensuring fast cruising with comparatively low fuel consumption.
Refining the propeller design is the ongoing job of research and design engineers at Rolls-Royce. Alongside the propeller design itself, the Promas system – where propeller and rudder are integrated into a single unit to optimise hydrodynamic efficiency – has been implemented in the design.
Rolls-Royce engineers started by gathering CFD information of the water flow towards the propeller. Then the design process began with Rolls-Royce proprietary software: different iterations of propeller and rudder design were tried before arriving at the optimal solution, which was then tested in physical experiments.
By creating a 1:11 scale model of the Promas rudder and propeller in the test tank facilities of the Rolls-Royce Hydrodynamic Research Centre (HRC) in Kristinehamn, Sweden, the propeller design was fine-tuned not only to ensure the speed and efficiency requirements are met, but also that any potential problems with cavitation can be eliminated. Cavitation is essentially where air bubbles form in the flow of water around and behind the propeller. It is particularly challenging at high speed, and as well as affecting performance it can also have severe impacts on noise and vibration – a critical consideration for any superyacht project, especially for one close to 30 knots! Cavitation issues were identified and eliminated by adjusting the rudder design. Finally, the tests proved that the propeller performed above expectations.
Project Cosmos will feature variable pitch propellers that will enable the yacht to handle both impressive cruising speeds in excess of 20 knots, as well as reaching a maximum speed close to 30 knots – a considerable achievement for an 80-metre superyacht. With the hull design optimised, the construction engineering finalised and the propulsion system going through the last stages of testing, Cosmos is already proving a milestone project for Heesen and the teams involved.
“Project Cosmos is raising the bar once again not only for Heesen, but for custom aluminium yacht building in general,” says Arthur Brouwer, CEO of Heesen. “Both from a technical standpoint and from a performance point of view we are pushing boundaries. Not only has this 80.7m project been designed to reach close to 30 knots, she has been designed for fast, 20+ knots cruising in an efficient manner. The solutions we have implemented to meet all these requirements are once again driving superyachting forward – just as Heesen has done with innovative and ground-breaking projects throughout its 40-year history.”
Construction is underway at the Mallorca-based shipyard of Servicios Técnicos Portuarios (STP), marking the start of an €8 million initiative aimed at modernising the facility to accommodate some of the largest vessels in the fleet for refitting and maintenance.To address the growing demand for large yacht services, STP's expansion aims to elevate productivity and streamline operations while expanding the shipyard's capabilities. “We have frequently received requests for mooring spaces for yachts exceeding 100 meters in length, and until now, we have struggled to meet that demand,” stated Joan Rosselló, general manager of STP. “With limited options for large berths in Palma, the new dedicated berths will significantly enhance our repair services and improve workflow across shipyard activities.”This major expansion is poised to invigorate Mallorca's local economy, drawing more significant refit projects to the area. STP estimates that the expansion could generate an additional €50 to €60 million in annual revenue for the region.On the technical side, the shipyard's total area will grow from 130,000 square meters to 162,000 square meters, incorporating 102,000 square meters of land and 60,000 square meters of water space. This enhancement utilizes previously underutilised areas at the edges of the current shipyard footprint, facilitating further development within STP’s existing concession.The waterway expansion will introduce five new berths that can accommodate yachts of up to 110 meters, adding to the existing three superyacht berths. On dry land, STP plans to establish specialized zones for various tasks, including a new covered section specifically for mast removal, repair, and painting.Additionally, STP is prioritising sustainability by installing photovoltaic panels on the new covered areas and the parking canopies. The anticipated solar energy output is expected to power approximately 115 apartments and reduce carbon dioxide emissions by 124 tonnes annually.The new berths will be operational by the end of 2024, while the rest of the works are scheduled for completion in spring 2025.Credits: STP
November 1, 2024
Royal Huisman announces that its impressive 59.7m high-performance sloop, Sarissa, has triumphed in three categories at the ISS Awards Gala held in Fort Lauderdale. The awards were determined and presented by esteemed peers within the superyacht industry, making this recognition particularly significant for the team.Sarissa has been honored with the titles of “Yacht of the Year,” “Best Interior Sail,” and “Best in Sail 40m+” at the International Superyacht Society Awards.Sarissa stands out for its state-of-the-art technology, exceptional naval architecture, and distinctive design, showcasing Royal Huisman’s commitment to innovation and excellence. Constructed using lightweight Alustar® aluminum and carbon composites, Sarissa not only minimizes fuel consumption but also enhances speed and maneuverability. Its forward-facing retractable propulsion system further enhances performance, reliability, and comfort, aligning with the industry's shift toward sustainability. Developed in collaboration with Malcolm McKeon Yacht Design, interior designer Liaigre, and owners’ representative Gregory Monks, Sarissa beautifully marries elegance with functionality, fulfilling the owner’s goal of an environmentally conscious yet high-performance superyacht.Congratulations are extended to the owners of Sarissa, along with heartfelt thanks from the design and build team. Jan Timmerman, CEO of Royal Huisman, states: “On behalf of our team, I would like to express our happiness and honor in receiving these awards. However, while we appreciate this recognition, we remain focused on our future projects, and we understand that a shipyard is only as strong as its next creation."Earlier this year, Sarissa was recognized as "Sailing Yacht of the Year" and "Best Sailing Yacht of 40m and Above" at the World Superyacht Awards 2024. She also garnered five significant awards at Boat International’s Design & Innovation Awards, including "Innovation of the Year."Royal Huisman is a Dutch shipyard established in 1884 in Ronduite, building and refitting custom luxury sailing and motor yachts at its shipyard in Vollenhove, the Netherlands.Credits: Royal Huisman
November 1, 2024
Italian yacht manufacturer AB Yachts has introduced an exciting addition to its lineup – the AB95, showcased at this year’s Fort Lauderdale International Boat Show. Designed by Marco Casamonti from Archea Associati, this 28.9-meter vessel is available in two distinct versions.AB95The first variant draws inspiration from its larger counterpart, the AB110, maintaining the brand's signature sporty character while enhancing onboard livability. This is especially evident in the flybridge, which features reverse glazing along the yacht's profile, creating bright and airy interiors with stunning sea views. Access to this space is seamlessly integrated through two external staircases leading from the aft deck.The second variant, known as the AB95 S, targets thrill-seeking owners with a focus on a more aggressive, "racing car" aesthetic. This model boasts sleek lines, a convertible roof, and a state-of-the-art propulsion system designed to deliver exceptional speed and performance.AB95 SBoth versions of the AB95 are engineered for smooth, vibration-free cruising and feature a draught of four metres, along with customizable "loft-like" interior spaces to suit individual tastes.Italian shipyard AB Yachts was founded in 1992. In 2001, AB Yachts was acquired by the Fipa Group. Today Next Yacht Group is the owner of the historic Maiora, AB Yachts, and CBI Navi brands. AB Yachts range consists of semi-displacement yachts from 17.70 to 42 meters.Credits: AB Yachts
November 1, 2024
FARO Alternative Investments, through its Real Economy sub-fund and in collaboration with advisory firm Orienta Capital Partners, has finalized the acquisition of Sunseeker International (Holdings) Ltd., a prestigious British shipyard celebrated for its production of high-performance luxury motor yachts. The acquisition marks the transfer of ownership from the Chinese industrial giant Dalian Wanda Group.94 Yacht The acquisition of 100% of Sunseeker is a significant milestone for FARO Alternative Investments, an innovative platform focused on creating value through a unique ecosystem of expertise and networking for investors and stakeholders. The transaction was supported by Miami-based investment firm Lionheart Capital alongside a club deal orchestrated by Orienta Capital Partners.Located in Poole, Dorset, Sunseeker has over five decades of experience in crafting top-tier yachts and is widely recognized as a pioneer in the luxury yachting industry. The shipyard generated approximately £320 million in sales in FY 2023, primarily from yachts measuring between 15 and 50 meters. Sunseeker currently boasts an order book valued at around £540 million (€640 million) and is set to expand its offerings by focusing on the development of high-end superyachts.Predator55Giancarlo Galeone, Chairman of FARO Value and lead advisor for FARO Alternative Investments SCSp SICAV RAIF, expressed enthusiasm about the acquisition, stating, “We are thrilled to embark on this new chapter alongside Sunseeker. Our established expertise in the nautical sector, paired with our longstanding relationship with the CEO, will further enhance the shipyard’s identity and craftsmanship, steering the brand towards our ambitious growth objectives. Sunseeker will maintain its British identity, continuing operations from its headquarters in Poole, where its production, workforce, and infrastructure are based.”Predator55Andrea Frabetti, CEO of Sunseeker, expressed confidence in the new ownership structure, stating, “We are confident that through this new ownership structure, Sunseeker will be able to grow and reach new milestones. Our goal will remain to build exceptional yachts that embody luxury, performance, and innovation, while honoring the legacy and vision of our founders.”FARO Alternative Investments SICAV RAIF (“FARO”) is an alternative investment fund operating through a globally active scalable platform with diversified strategies, mainly in Private Equity and Venture Capital. Orienta Capital Partners is an investment firm based in Milan, Forlì and Reggio Emilia, specializing in cross-industry transaction as lead investors, focusing on high-growth potential SMEs.Credits: Sunseeker
October 31, 2024
Sirena Yachts has unveiled exciting new details about its latest project, the Sirena 118, at the Fort Lauderdale International Boat Show 2024. This striking 36-meter GRP superyacht introduces a contemporary design and represents the launch of a new, larger composite line, boasting a waterline length exceeding 24 meters while remaining under 300 gross tons.The design is currently in the works, featuring a flexible tri-deck layout that includes three decks of accommodation topped by an expansive sun deck. Future amenities could include an optional circular pool and lounging area at the bow, as well as a spacious beach club at the rear.The Sirena 118’s bold plumb bow not only makes a strong aesthetic statement but also enhances the internal volume, providing ample room for a VIP cabin and up to four guest cabins on the lower deck. The owner’s stateroom occupies the forward section of the main deck and offers a unique option to span two decks, complete with a spiral staircase leading to a generous relaxation area and a fold-down swim platform for easy access to the water.Social spaces are equally impressive, featuring an informal dining and lounging area on the main deck aft with floor-to-ceiling windows facilitating a seamless connection to the outdoor deck. The upper deck provides additional dining options alongside a wet bar, complemented by a more secluded exterior space. The yacht is designed for a crew of five, with the possibility of expanding to seven with the inclusion of a captain's cabin on the upper deck.The sleek underwater profile is crafted by the renowned German Frers, while the yacht's exterior design comes from Sirena's in-house team, encapsulating the brand’s essence. Cor D Rover is in charge of the interior, which will possess a timeless and relaxed ambiance, although owners will have the option to customize their yacht to their preferences.Constructed from GRP, the Sirena 118 promises operational efficiency. It features a fast displacement hull powered by two MAN V12 engines generating a total of 3,100hp, allowing for a top speed of 16 knots and an economical cruising speed of 11 knots. An upgraded engine package producing 3,800hp is also available, which offers a top speed of 21 knots.“The 36-meter Sirena 118 will be the largest GRP yacht we have built to date,” stated Constantinos K. Constantinou, Head of Sirena Yachts USA. “This superyacht is being meticulously crafted to embody the pinnacle of the values that have driven the global success of Sirena Yachts and Sirena Superyachts. Intelligent design, flawless engineering, and sleek, modern aesthetics are seamlessly integrated with our profound passion for the yachting lifestyle. We’re excited to keep yachting enthusiasts informed as this exceptional project progresses toward its 2026 completion.”Sirena Yachts is a Turkish yacht brand. The company produces semi-displacement motor yachts ranging from 17m to over 30m.Credit: Sirena Yachts
October 31, 2024