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.”
Northrop & Johnson has been named the exclusive sales broker by Ares Yachts for the globally anticipated sale of the shipyard’s flagship, Simena. Currently in the outfitting stage in Antalya, the 62-meter superyacht is slated for delivery in March 2025.“We are pleased to collaborate with such a reputable company,” states Kerim Kalafatoğlu, Chairman of Ares Yachts. “We trust Northrop & Johnson to introduce our remarkable flagship to the market and promote her effectively.”“Northrop & Johnson is honored to represent Ares for the sale of the magnificent 62m Simena, set for delivery in March 2025. Ares has established itself as a leading shipyard in Turkey with an exceptional track record of over 230 vessels. Simena presents a rare opportunity to acquire a yacht of exceptional quality at a competitive price,” says Patrick Coote, Europe Managing Director of Northrop & Johnson.Simena, Ares Yachts' 62-meter flagship, entered the outfitting stage in November. The completion of outfitting, including joinery work, will precede the installation of the rigging system.Kerim Kalafatoğlu and Patrick Coote“Exterior paintwork is in progress, and the superstructure and hull connection have been completed,” shares Piraye Sahinkaya Orhun, Managing Director of Ares Yachts. “Construction of the mahogany planking for the superstructure and doghouse is underway, along with the insulation, wiring, and piping from the aft crew accommodation.”Designed by Taka Yacht Design and Design Unlimited, Simena epitomizes classical and modern design elements. The vessel, designed to RINA Class C standards, boasts traditional teak decks and varnished Sipo Mahogany exterior joinery.Accommodating up to 12 guests and nine crew members, Simena offers luxurious onboard living. Its owner’s suite is strategically located forward on the main deck. Equipped with a sophisticated hybrid drive system, the yacht can operate silently under electric power at speeds up to 6 knots. Additionally, a 882 kW diesel engine complements her 220kW electric motors, allowing for a top speed of 14.5 knots and a cruising range of 4,000 nautical miles at 11 knots.To maintain the yacht’s clean interior aesthetics, modern design elements have been discreetly integrated, including hidden TV lifts in the saloon and master suite. Walnut forms the basis of the interior, complemented by textured leathers, fabrics, and antiqued brass accents. Showers feature a blend of patterned tiles alongside Calacatta Oro and Patagonia White marbles, offering a blend of contemporary comfort and classic elegance.Ares Yachts, situated in Antalya Free Zone on Turkey’s south coast, spans 40,000 square meters of build space across four large sheds. Besides Simena, the shipyard is concurrently working on other projects, including the 50m motor yacht Spitfire and a 54m explorer yacht known as Project Atlas. Additionally, Ares Yachts is developing a 65-85m yacht range in collaboration with Lateral Naval Architects.Credits: Northrop & Johnson
April 25, 2024
As the Palma International Boat Show commemorates its 40th anniversary, it sets its gaze firmly on the future with two groundbreaking initiatives: an economic impact study and certification as a sustainable event. Organized by the Regional Ministry of Enterprise, Employment, and Energy, in collaboration with the Balearic Islands Institute for Business Innovation (IDI) and the Balearic Yacht Brokers Association (BYBA), the fair opens today at Palma’s Moll Vell.The economic impact study, conducted in partnership with the Directorate General of Economics and Statistics of the Ministry of Economy, Finance, and Innovation, aims to assess the fair's contribution as an economic driver for the city and the region. Simultaneously, the fair is pursuing certification as a sustainable event, committing to minimizing its carbon footprint and promoting responsible practices.With a record 295 exhibitors, including international companies, the event promises to showcase an array of quality nautical products across its 86,000-square-meter venue. Notably, the Palma Superyacht Village will feature a dedicated area for boats over 24 meters, complemented by the introduction of the Superyacht Square, emphasizing innovation and sustainability.As part of the anniversary celebrations, the Balearic Superyacht Forum, the first international superyacht forum in the Balearic Islands, will convene around 300 industry professionals, enthusiasts, and experts to discuss the sector's future. Additionally, the fair will pay tribute to the companies that have contributed to its success over the years, recognizing their pivotal role in shaping the event's legacy.The 40th-anniversary festivities will culminate in a series of activities on April 26th, featuring music, entertainment, and a captivating drone show. Credits: The Palma International Boat Show
April 25, 2024
ISA Yachts reveals the initial glimpses of the ISA Custom 80 meters as it embarks on its interior outfitting phase. Designed by Espen Øino International for the exterior and Peter Marino Architect for the interior, this flagship project marks a new milestone for the shipyard. With a gross tonnage of 2150 GT and a length of 80 meters, the vessel is scheduled for delivery in 2026. In addition to this custom 80-meter, currently at the Ancona Shipyard there are other three ISA Yachts-brand constructions under way: an 80-meter of the Gran Turismo line (with exterior and interior by Enrico Gobbi Team for Design) due to be delivered in 2027, and two 66 meters. One of these has both exterior and interior designed by the Nuvolari-Lenard Studio, while the other has exterior design by Vallicelli and interior design by Enrico Gobbi – Team for Design, and they are set to be presented in 2026.Dedicated to producing forward-thinking superyachts made only with superior quality materials, ISA Yachts is a leading global superyacht and megayacht builder. Every ISA superyacht is uniquely designed to her owner’s briefs, and is built using the highest technology, the best quality materials and the finest furnishings and finishes. Currently in build are two 80-meter projects due to become the new ISA Yachts flagships. ISA Yachts is part of Palumbo Superyachts, which also includes: Columbus Yachts, Mondomarine and Extra Yachts.Credits: ISA Yachts
April 25, 2024
Denison Yachting celebrates the successful delivery of superyacht Extra Time, the second hull in Conrad Shipyard's esteemed C144S series. Yacht broker Alex G. Clarke lauds Conrad Shipyard's exceptional craftsmanship, highlighting the collaboration with Reymond Langton Design and Diana Yacht Design as a testament to the vessel's quality.Extra Time boasts luxurious amenities, including a spacious tender garage, beach club, hot tub, and accommodations for up to 12 guests. Built to Lloyds MCA LY3 standards, the yacht features a steel hull, aluminum superstructure, and impressive technical specifications. Clarke, who attended the christening ceremony in Gdańsk, praises the dedication of the Conrad Shipyard team and expresses confidence in the yacht's performance.With Hull #2 and #3 sold, Denison Yachting now offers Hull #4 exclusively for sale, asking €27.7 million, available with a late 2026 delivery.Conrad Shipyard is located in Gdansk, Poland and specializes in building steel, and aluminum luxury yachts ranging from 24 to 100 meters in length.Denison has long been a leader in the yachting industry with a rich family history dating back to 1948, and the start of Broward Marine in Fort Lauderdale. Today, the company provides complete yachting services worldwide, including superyacht sales, yacht charter, crew placement, and new construction. Denison operates out of 21 waterfront offices in the United States, and one location in Monaco with a team of 100+ licensed and bonded yacht brokers. Credits: Denison Yachting
April 25, 2024
Royal Huisman makes waves once again with Noir, an 81-meter sailing yacht, setting a new standard in superyacht excellence. Designed by Malcolm McKeon, Noir boasts the world’s tallest sloop rig at 93 meters, embodying the epitome of luxury and performance.McKeon, the mastermind behind this groundbreaking design, envisions Noir as the ultimate vessel for the owner's pleasure and adventure with loved ones. With a contemporary profile featuring a reverse bow and a flying bridge, Noir offers ample outdoor living space and unparalleled connectivity to the sea.An experienced sailor himself, Noir's owner prioritizes speed, power, and responsive handling, ensuring an exhilarating sailing experience. The yacht is tailored for world cruising and exploration, equipped with a 14-meter tender for coastal excursions without the need for yacht repositioning.Crafted from aluminum and powered by electric drives, Noir combines cutting-edge technology with sleek design. Rondal supplies the mast, boom, and integrated sailing system, contributing to Noir's status as the world's tallest sloop.Noir's interior, designed by GCA Architects, promises to harmonize with the contemporary exterior, blending natural materials and textures for a luxurious yet relaxed atmosphere. With details kept under wraps, anticipation for the unveiling of Noir's interior design continues to grow.Royal Huisman CEO Jan Timmerman expresses pride and gratitude for being selected to bring Noir to life, marking a significant milestone in the shipyard's 140-year history. As the fourth yacht to join the ranks of the world's Top 10 largest sailing yachts, Noir solidifies Royal Huisman's reputation as a leader in bespoke yacht craftsmanship and innovation.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
April 24, 2024