The world's billionaires have a long-standing history of owning some of the most luxurious yachts ever made. This can of course be explained through their wealth but also through their taste. Following the release of this year's list of the world's billionaires by Forbes, we've decided to compile the list of the richest people who according to other media publications own a yacht.


#1 Musashi | Larry Elisson | $47 billion 


 
The Japanese name of this Feadship XL-88 comes from the renowned samurai, Miyamoto Musashi, who is not only revered as the greatest samurai of all time but also as the author of The Book of Five Rings which deals with strategy, tactics, and philosophy that is still studied today. This choice of name does not come as a surprise knowing that Larry Ellison is an aficionado of Japanese culture.

Designed by the duo De Voogt Naval Architects/Sinot Yacht Design, the 87.78 metres of Musashi accommodate a total of 18 guests and a crew of 23. One of the two master suites faces forward on the upper deck, while the second one is aft on the bridge deck. Seven further double guest cabins are on the main deck.

#2 Senses | Larry Page | $35.2 billion



Delivered by Germany's Schweers yard in 1999, this superyacht was designed, built and engineered to rise to the challenges of exploring the world's oceans. Senses carries a comprehensive inventory of equipment and exceeds the expectations of any 21st century adventurer.

She is the opportunity for a truly unique lifestyle in luxury yachting with stylish, well appointed interiors designed by Philippe Starck.
Split-level decks provide open and shaded sun-lounging areas, secluded side pods, sheltered outdoor dining and informal seating areas, an airy and light gymnasium and a private beach club complete with Jacuzzi and vast sun beds. With impressive volume provided by six decks and a beam of 12.7m, Senses can store three tenders laterally, has full helicopter capability and a stern-launched 42' Nelson tender.

Water toys include no fewer than four high speed tenders, five waverunners, two jet skis, snorkeling gear, diving equipment and a range of towables.


#3 Dragonfly | Sergey Brin | $34.4 billion



Built by Silver Yachts in 2009, Dragonfly was hailed as the fastest, most fuel-efficient long-range cruising superyacht on the water. She has a transatlantic range at 22 knots and has a fuel consumption of only 360 litres per hour at 18 knots, extending her range to 4,500 nautical miles.
Previously named Silver Zwei her luxurious interior is designed by Silvestrin Design and her exterior styling is by Espen Oeino.

The superyacht offers accommodation for up to 18 guests, who are taken care of by a crew of 16. The most special feature is the yacht's foredeck helipad that doubles as a guest sitting area. Also she has two tender garages, one forward and one aft, the latter converting to a beach house following the launch of the tenders.

#4 Symphony | Bernard Arnault | $34 billion



Symphony, formerly known as Project 808, was launched in January 2015. She is the first Feadship yacht to exceed the 100-metre mark, surpassing the builder's previous flagship, 99-metre Madame Gu, launched in 2013. It's also the first Feadship yacht built to be fully compliant with the new Passenger Yacht Code (PYC) regulations, which allows for pleasure yachts to carry 13 to 36 passengers. Building with PYC has allowed for a custom interior that makes use of veneers, leathers and exotic materials that are compliant with the new rules. She is also certified for chartering with helicopter operations.

The yacht features exterior design by legendary yacht designer Tim Heywood with naval architecture by Feadship's  De Voogt Naval Architects. Her accommodation is spread over six decks, with up to 20 guests hosted in six staterooms, including one full-beam VIP cabin, double owner's stateroom and additional guest cabins on the lower deck.

Symphony is also kitted out with a gym, a beauty salon and massage room and carries no less than three custom Pascoe tenders of 9.6, 8.3 and 7.85 metres, as well as two wave runners, two Seabobs, windsurfers, watersides and various inflatable toys. Her layout includes an observation lounge, bar and Jacuzzi on the sun deck, while the bridge deck features a terrace and outdoor cinema. The main deck hosts a six-metre contraflow, glass-bottom swimming pool with waterfall, and below the pool on the lower deck is a lounge, beach club and wellness centre, as well as an ultra-high-definition megayacht cinema.

#5 Moneikos | Leonardo Del Vecchio | $19.1 billion




Moneikos was built in 2006 by Codecasa in 2006 to a Della Role Design. The yacht can reportedly accommodate up to 16 guests in 8 cabins.

With a beam of 11.2 meters, the yacht can cruise at a speed of 14 knots for 6,000 nautical miles.

#6 Tatoosh | Paul Allen | $17.5 billion



Tatoosh is a 92.42m motor yacht, built by Nobiskrug for mobile phone magnate Craig McCaw. Then the vessel was purchased by Paul Allen for a reported $100 million. Allen also owns the motor yacht Octopus. The yacht's interior has been designed by Terence Disdale and has exterior styling by Kusch Yachts, Studio Yacht.

The owner's accommodation incorporates two deck levels and is designed for total privacy, with a full beam bedroom, family room, observation lounge, gymnasium and a private office along with two children's cabins. She can sleep 20 guests overall in a further nine double staterooms and two cabins for four staff. Amenities aboard include a cinema and a heated swimming pool with contra-flow jets and Tatoosh also has two helicopter pads.

#7 Kingdom 5KR | Prince Alwaleed | $17.3 billion



Kingdom 5KR was launched by Benetti in 1980 and was one of the world's largest yachts for many years.  The 85.9 metre yacht was designed by Luigi Sturchio and originally named Nabila.
The yacht has not had a quiet life. She featured in the James Bond movie Never Say Never Again and was owned for a time by 2016 candidate for President of the United States, Donald Trump. However she can now usually be found berthed at the International Yacht Club in Antibes.

The superyacht features five decks, a disco, a cinema with seats for 12 and 2 double beds, 11 opulent suites, a helipad on top (its funnels are sloped outward to avoid interference with the helicopters), a pool with a water jet on top in front of the heliport, 2 Riva tenders, a crew of 48, a top speed of 20 knots, and cruising speed of 17.5 knots.


#8 Venus | Laurene Powell Jobs | $16.7 billion



A 78 metre aluminum yacht engineered by De Voogt Naval Architects with styling by Philippe Starck was launched in 2012 and last refitted in 2015.

One of the best Feadship superyachts of all time, Venus has a wealth of interesting design features, from her highly innovative glass exterior design to the reported high-tech amenities. The yacht is extremely secret with no interior images ever seen.

The new photos show Venus emerging from her refit with a gleaming hull, and close-up pictures give a look at intriguing details of the yacht. The bridge on Venus, for instance, is packed with Apple computers.

Sadly, Steve Jobs passed away in 2011 before the yacht was launched and never got to enjoy his vessel.

#9 Archimedes | James Simons | $15.5 billion




Archimedes is a 68.00m (223.09 ft) luxury motor yacht. She was built by Feadship in 2008 making the yacht 8 years old. With a beam of 12.30m and a draft of 3.50m, she has a steel hull and aluminium superstructure. This adds up to a gross tonnage of 1462 tones. She is classified by Lloyds.

She is powered by Catepillar 3516B DITA engines of 2,000hp each, capable of reaching a maximum speed of 16 knots and cruise at 12 knots for 7500 nautical miles.

She can accommodate 8 guests in 4 cabins with an interior design by John Munford and an exterior design by John Munford.

#10 Pacific | Leonid Michelson | $14.4 billion



The 85,2m yacht was built by Lurssen in 2010. The yacht's interior has been designed by Bannenberg & Rowell Design and exterior styled by German Frers. 
Pacific offers accommodation for up to 12 guests. She is also capable of carrying up to 28 crew onboard to ensure a relaxed luxury yacht experience.
The yacht has a unique colour, which seems to change in the sun.

Little more is publically known about Pacific. She has been designed and built to be a blue water superyacht made for the ocean and she will no doubt be able to explore long distances in trying conditions if required. While not plumb, her bow is reasonably sheer and it raises to an ample height above the waterline with good flare which is ideal for challenging ocean and weather conditions.

#11 Dilbar | Alisher Usmanov | $12.5 billion



Launched by Lurssen in November 2015, the superyacht was reportedly built for Russian billionaire Alisher Usmanov, who owns a 110 metre superyacht Dilbar, which has now been renamed Ona.

Not a lot is known about this project, only that 156m Omar could possibly be the largest yacht in the world measured by gross tonnage. It is understood that her exterior design is by Espen Oeino with interiors by Andrew Winch. Omar's construction materials of a steel hull and aluminium superstructure are confirmed.
The megayacht has recently been spotted in Germany heading out on sea trials. Omar is due to be delivered in 2016.


#12 C2 | Ronald Perelman | $12.4 billion



Little is known about C2, Eminence, Amaryllis, Titan and her share the same hull platform.

C2 is a 78.00m (255.90 ft) luxury motor yacht. She was built by Abeking & Rasmussen in 2008 making the yacht 7 years old. With a beam of 12.14m and a draft of 3.20m, she has a steel hull and aluminium superstructure. This adds up to a gross tonnage of 2050 tones. She is classified by Lloyds.


#13 Nirvana | Vladimir Potanin | $12.1 billion


Built by Oceanco in 2012, Nirvana was the star of the Monaco Yacht Show the following year busting an aquarium aft and a set of revolutionary features.

With a jungle-themed interior design, the yacht features two spa pools and extensive lounging accommodations. Designed by Sam Sorgiovanni, the yacht has a transpacific range and a maximum speed of 19.5 knots.

The yacht was previously listed for sale asking 199 million euros but was supposedly taken off the market without any sale occurring.

#14 Tango | Viktor Vekselberg | $10.8 billion




Tango is a 78.00m (255.90 ft) luxury motor yacht. She was built by Feadship in 2011 making the yacht 5 years old. With a beam of 12.20m and a draft of 3.65m, she has a steel hull and aluminium superstructure. This adds up to a gross tonnage of 1250 tones. She is classified by Lloyds.

#15 Amevi | Lakshmi Mittal | $9 billion




Part of the, at the time, new initiative by Oceanco to move to larger yachts, Amevi was allegedly delivered to Lakshmi Mittal for the 2007 summer season.

Amevi is a 80.00m (262.46 ft) luxury motor yacht. She was built by Oceanco in 2007 making the yacht 8 years old. With a beam of 14.20m and a draft of 3.90m, she has a steel hull and aluminium superstructure. This adds up to a gross tonnage of 2500 tones.

#16 A | Andrey Melnichenko | $8.4 billion




There is perhaps no more noticeable shape than the Philippe Starck design of superyacht A. Built by Blohm and Voss in 2008 out of a steel hull and aluminum superstructure for owner Andrei Melnichenko, A has a length of 119 meters.

Crewed by 42, A is capable of accommodating 14 guests in 7 luxurious cabins. With her upside-down exterior line, A has a draft of over 5 meters which allows for plenty of volume as well as increased stability. With a meticulous attention to detail, A's interior uses wood furniture with natural light to reach an innovative style.

#17 Palladium | Mikhail Prokhorov | $7.9 billion



With an original design by Michael Leach, Palladium, formerly Project Orca, is thought to be own by Mikhail Prokhorov, Russian oligarch and owner of the Brooklyn Nets.

Palladium is a 95.15m (312.17 ft) luxury motor yacht. She was built by Blohm + Voss in 2010 making the yacht 5 years old. With a beam of 16.00m and a draft of 4.40m, she has a steel hull and aluminium superstructure. This adds up to a gross tonnage of 6000 tones. She is classified by Lloyds + MCA.

#18 Mayan Queen IV | Alberto Bailleres Gonzalez | $7.6 billion



Owned by Mexican billionaire, Alberto Bailleres, Mayan Queen IV, formerly known as Project Safari, has been built as a replacement vessel for his previous 49m Feadship, MQ2.

Mayan Queen IV is a 93.25m (305.93 ft) luxury motor yacht. She was built by Blohm + Voss in 2008 making the yacht 7 years old. With a beam of 15.88m and a draft of 4.25m, she has a steel hull and aluminium superstructure. This adds up to a gross tonnage of 3879 tones. She is classified by Lloyds.

She can accommodate 16 guests in 8 cabins with an interior design by Terence Disdale and an exterior design by Tim Heywood.

#19 Eclipse | Roman Abramovitch | $7.6 billion



Demoted from the rank of the largest superyacht in 2013 by Azzam, Eclipse has dominated for 3 years the superyacht rankings with a tremendous length of a 160m. Owned by Russian billionaire, Roman Abramovich, Eclipse , is now the flagship of the Blohm + Voss yards.

Built in a shroud of secrecy in 2010 to a design by Terence Disdale, Eclispe features a 16-meter long swimming pool convertible into a dance floor, a three-man private submarine, an exterior fireplace as well as space for six tenders and three helicopters.


#20 Rising Sun | David Geffen | $6.6 billion




Built by Lurssen Yachts to a famous Bannenberg exterior design, the 138m Rising Sun has beam of 18.5m and a draft of 5m. She is powered by 4 MTU engines of 12,230 hp each giving Rising Sun a maximum speed of 28 knots and a cruising speed of 26 knots.

Originally commissioned by Larry Ellison, founder of Oracle, the project was supposedly extended by 18 meters to become larger than the 126 m Octopus owned by Microsoft owner Paul Allen. Half of it was sold a year later to David Geffen, media mogul, who bought the remaining share in 2010.


#21 Seven Seas | Steven Spielberg | $3.5 billion




Owned by Steven Spielberg, Seven Seas features a large cinema, several large televisions and a large swimming pool aft.

Seven Seas is a 86.00m (282.15 ft) luxury motor yacht. She was built by Oceanco in 2010 making the yacht 5 years old. With a beam of 14.02m and a draft of 3.96m, she has a steel hull and aluminium superstructure. This adds up to a gross tonnage of 2658 tones. She is classified by MCA.

She is powered by MTU engines of 4680hp each, capable of reaching a maximum speed of 20 knots and cruise at 15 knots. 

She can accommodate 12 guests in 7 cabins with an interior design by Nuvolari & Lenard and an exterior design by Nuvolari & Lenard

#23 Radiant | Abdulla Al Futtaim | $3.1 billion




Built by Lurssen yachts in 2009 to a famous Tim Heywood exterior design, Radiant has a length of 110m, a beam of 16.2m and a draft of 4.6m. With a steel hull and aluminum superstructure, these metrics add up to a gross tonnage of 5,027 tones.

Commissioned by Boris Berezovsky, Russian billionaire who died in London in 2013 after having lost a huge lawsuit against Roman Abramovitch, his rival in the Russian market, the yacht was supposed to rival Abramovitch's Pelorus. The yacht has cost a reported 270 million $ to build but was sold, 10% away from completion to Abdulla al-Futtaom, UAE billionaire. The sale resulted in a lawsuit between Ousmanov and Edmiston for a 6 million commission that was ultimately paid to the brokerage firm.


#24 Ocean Victory | Victor Rashnikov | $1.87 billion




Ocean Victory was built for Russian billionaire, Victor Rashnikov and delivered in 2014.

#25 Lady Lara | Alexander Machkevich | $1.65 billion



Owned by Kazakh billionaire Alexander Machkevitch, the 91m long superyacht embarked her first sea trials in July. It is believed that Machkevitch still owns his previous yacht, which has been put on the market this year for $35million. 

The superyacht's noticeable features include VIP suites with fold down balconies, a large beach club, a gym, Jacuzzi, a swimming pool and even a helipad. Lady Lara has a full displacement hull and an aluminum superstructure. Her exterior and interior design comes from Reymond Langton. 

Latest News

Report on death of 81-metre superyacht Kibo (now Grace)
On the morning of 03 May 2015, the large private yacht Kibo (now Grace) was at anchor off Portals Nous in the island of Majorca. A party of 6 guests were on board.As was the normal practice when guests were on board, the work day started early by cleaning the exterior of the yacht and preparing various equipment and facilities for the use of the guests. It was decided that this would be a suitable opportunity to clean the rubbing strakes (known as “rub rails”) on the yacht’s hull approximately 3m above the waterline. This work involves a crew member working over the side of the yacht supported by a safety harness and a “bosun’s chair” that were secured to the yacht’s bulwarks. A deckhand / assistant engineer (“the Deckhand”2) was chosen for the cleaning duties and commenced the overside work, under the supervision of the Chief Officer (C/O) and the Third Officer (3/O).After working over the side for approximately 50 minutes, the Deckhand fell from the worksite into the water and sank below the surface. An on board rescue was commenced, and the Deckhand was recovered from water. The time from the Deckhand falling from the worksite to being recovered back on board the yacht was approximately 13 minutes. First aid was administered, and an ambulance was arranged from shore. With first aid continuing, the Deckhand was transferred to shore in the yacht’s tender where he was transferred to a local hospital for treatment.Due to being deprived of oxygen while under water, the Deckhand suffered hypoxic brain injuries and was left severely disabled. On 07 June 2017 the Deckhand died of bronchial pneumonia brought on by his immobility following the accident. A ruling of accidental death was recorded following an inquest at Birmingham Coroner’s Court.The investigation found that the primary cause of this accident was poor working practices on board and a failure to follow the yacht’s documented safety management system (SMS).
MEISSEN for Dynamiq: German craftsmanship meets Italian boutique yacht brand
Dynamiq starts the New Year with exciting news and we are proud to announce a collaboration with the oldest and one of the most prestigious porcelain manufacturers in Europe: MEISSEN in Germany was founded in 1710 and is renowned around the world for its centuries of craftsmanship and artistic tradition. "Dynamiq’s philosophy is to work with the best companies in the industry, and with MEISSEN we are now able to offer their beautiful porcelain to our clients,” says Paola Gorla, Dynamiq’s Head of Interiors. "The Crossed Swords insignia of MEISSEN is synonymous with the highest-quality porcelain and can be seen in the top hotels and on the most luxurious yachts, including Dynamiq yachts in the future.”With two hand-picked collections perfectly fitting the interior style of Dynamiq yachts, the “MEISSEN for Dynamiq” package includes plates, cups, vases and decorative items, which can be further customised for the client by adding the yacht name or initials onto each item. Tailor-made porcelain storage will also be installed on board the yachts for safe storing."We are very happy to work with Dynamiq. We definitely share some synergies in innovative design and modern attuned products. ” says MEISSEN CEO Georg Nussdorfer. “Our dedicated specialists will be happy to support Dynamiq’s client in finding the right porcelain for him or her, as well as further personalising the collections to their needs."The base price for the full porcelain set of “MEISSEN for Dynamiq” is 26,000 euros. The exclusive package is now available via Dynamiq’s Online Configurator.
Construction of 32-metre superyacht by Van Der Valk for repeat client
Van der Valk Shipyard in the Netherlands is making excellent progress with the construction of a 32-metre Raised Pilothouse motoryacht, the order for which was placed at the end of 2017. The first details can now be released on Jangada 2, which is being built for an experienced repeat client. Designed in partnership with Nick Top and Guido de Groot, this innovative yacht has a wide range of bespoke elements to match the owner’s very specific brief. Scheduled for delivery in May 2019, Jangada 2 is the fifth distinctive superyacht in Van der Valk’s successful custom-series line and, as the largest to date, raises the bar even higher. The four previous models were the 27.21-metre The Next Episode (2014), the 24.99-metre Jangada (2015), the 26-metre Forum (2017) and the 26-metre Nicostasia (2018).“The different lengths of these all-aluminium beauties reflect the wide degree of choice which our Raised Pilothouse design offers owners,” says Van der Valk marketing manager Yoeri Bijker. “This is enhanced by the fact that the yachts are built entirely in-house to the highest Dutch standards. Clients can go as large as 40 metres with this model or any other design in our state-of-the-art facilities. With our new Van der Valk BeachClub range also making waves in the market, the first of which will be launched in spring 2019, our yard is entering an exciting new phase of growth.” Another reason for the confidence of the Van der Valk team in the future is the significant number of clients returning to the yard for a new build after enjoying their time on a previous yacht. As one of the designers of Jangada 2, Guido de Groot has been closely involved in this project from the outset. “It was a real pleasure to work with such an experienced owner and create a very functional GA that meets the his specific requirements. The yacht will carry more crew than their previous boats so together with the captain we paid significant attention to these accommodations. Lots of work also went into the spacious galley as we optimised the functional area under the raised pilothouse. “In a similar vein, the bathroom of the VIP suite on the main deck can be closed off for use by guests during the day after swimming and the like without entering the bedroom itself. This kind of smart thinking typifies the genuinely bespoke nature of the project, which is an impressive achievement by the yard. The owner visited several other top builders before electing for Van der Valk and no other yard could offer him such a tailor-made creation. ” Other examples of specific requests on Jangada 2 include a minimalistic interior style based principally on whitewashed European oak. The flybridge deck will have an outdoor dining area, a sunbathing space with plenty of loose sunbeds and an all-aluminium hardtop providing ample shade, as well as a smart wet bar. There will be abundant space for the storage of a tender and/or toys, including a crane with a lifting capacity of 800 kilograms. This deck will also feature a handy outdoor helm station. The main deck aft will be spacious and inviting, with a wide range of loose furniture. Electrically operated curved glass sliding doors will connect this area to the roomy saloon, which will hold a sofa to port and two Corbusier LC2 chairs. The large raised pilothouse will house a cosy U-shaped sofa as well as the main helm position. Further forward will be a generous, well-equipped galley with lots of storage space, and the deck will also feature a day head. The VIP cabin with ensuite bathroom will be located furthest forward, offering some fine views.The lower deck will house a selection of comfortable accommodations for all who sail on Jangada 2. The full-beam master suite features a separate bathroom & head, large wardrobes, and an office desk to port flanked by a sofa starboard side. A second well-proportioned double suite is found on the port side. There are two more cabins on this deck designed with children in mind, sleeping up to five kids in two sets of bunk beds and a single berth. The crew area is forward on the lower deck, comprising a captain’s cabin and two cabins sleeping four other crew members, all with ensuite facilities. There is also a dedicated crew mess and pantry. The lazarette/garage aft will have capacity for two wave runners and double as a beach with a hydraulic platform.The hull of Jangada 2 is fitted with a Van Oossanen Hull Vane fixed foil for enhanced fuel efficiency along with a bulbous bow. A VEEM 145 zero-speed gyroscopic stabiliser will make sure she is comfortably steady even in choppy seas. The yacht’s propulsion package comprises twin MTU 12V2000 M96L engines with a capacity of 1432 kW at 2450 rpm, as well as twin 32-kilowatt generators. Her maximum speed will be some 23 knots, while she will cruise at a brisk 18 knots. Jangada 2 is being constructed under RINA:C✠ HULL, MACH ; Y class for unrestricted navigation under pleasure yacht registration, and will receive an additional RINA comfort class certificate.
80-metre superyacht Cosmos behind-the-scenes insight
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.<iframe width="1067" height="600" src="https://www.youtube.com/embed/RgjWgN0ESCg" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>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. <iframe width="1067" height="600" src="https://www.youtube.com/embed/h3HsopvR6Qs" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>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.”
35-meter superyacht CV115 to be launched by Tansu in summer
Turkish shipyard Tansu are preparing the launch of their 35-meter CV115 yacht from Mission Class. The launch is scheduled in summer. Designers created an open deck space of 65 square meters, where an 8-meter tender can be stored, as well as crew tenders and other toys, such as mx bike. Tenders and toys can be deployed by 2,500-ton deck Hydromar cranes. CV115 will be built from steel hull and aluminium superstructure and can accommodate 8 guests in 4 guest cabins. On the upper deck, there is master suite with panoramic view. Crew quarters is for 5 people. CV115 is capable of reaching a top speed of 15 knots.