Van Oossanen Naval Architects Brief

Van Oossanen Naval Architects Luxury Yacht Charter & Superyacht News

Motor yacht ALIVE – The first Superyacht equipped with Hull Vane by Van Oossanen Naval Architects

March 26, 2015

The recently delivered 42-meter displacement motor yacht Alive (hull 17042) by Heesen Yachts is the first luxury vessel equipped with a Hull Vane, invented by Van Oossanen Naval Architects. After a 30m passenger catamaran and a 55m offshore supply vessel, superyacht Alive represents the third full-scale application of the fuel saving device called Hull Vane. Full scale test results have proven fuel savings averaging 20% in the yacht’s useful speed range (12-16 knots).

Heesen superyacht Alive (hull 17042) with a Hull Vane by Van Oossanen NA

Heesen superyacht Alive (hull 17042) with a Hull Vane by Van Oossanen NA

Even without Hull Vane, the hull shape of luxury yacht Alive is very fuel efficient, as it is based on the Fast Displacement Hull Form (FDHF) from Van Oossanen Naval Architects, the company where the Hull Vane was originally invented.  Model tests at the Wolfson Unit showed unprecedented fuel economy for a yacht of these dimensions – and this was later confirmed at sea.

In November 2014, super yacht Alive was put to the test during sea trials on the North Sea. As the Hull Vane on MY Alive is integrated into the construction under the swim platform, testing without the Hull Vane was not possible. In July 2014, such back-to-back comparison trials were done on a 55 m Fast Supply Intervention Vessel, confirming the predicted fuel savings for that vessel of 10% at 12 knots up to 15% at 21 knots. The speed trials on MY Alive did however correspond exactly with the predicted resistance curve using computational fluid dynamics (CFD) software and model tests, which showed that the Hull Vane reduces the resistance by 20% at cruising speed. With her pair of 1.080 kW main engines, MY Alive reaches a top speed well over 16 knots.

Luxury motor yacht Alive

Luxury motor yacht Alive

As the Hull Vane was incorporated into the design of Alive yacht from the beginning, it already saved money and space during the build: smaller main engines could be installed for the same top speed and smaller fuel tanks to achieve the same transatlantic range. The Hull Vane is a particularly attractive option for newbuilds, especially large yachts, fast commercial ships and naval vessels, as the cost savings on the main engines often outweigh the cost of the Hull Vane. So for roughly the same overall build cost, a ship can be built with more usable interior volume, significantly lower fuel consumption and better seakeeping in waves.

The main working principle of the Hull Vane is forward thrust: the hydrofoil generates a lift force in the upward flow under the aft ship. As this lift force is angled forward, a net forward thrust force is developed. The Hull Vane sometimes has been called “the bulbous bow of the stern” as it also reduces the stern wave created by the vessel and therefore the energy put into the wave system. Due to the vertical lift, the running trim is also influenced beneficially. As the Hull Vane dampens the pitching, rolling and yawing movements, the savings percentage is higher when sailing in waves, because the added resistance from ship motions is reduced.

Alive superyacht

Alive superyacht

The patented Hull Vane is sold exclusively by Hull Vane BV and its appointed sales agents. The Hull Vane is not exclusive to any design office or shipyard. It is suitable for relatively fast ships sailing at displacement or semi-displacement speeds, which corresponds with Froude numbers of 0.2 to 0.7. Besides superyachts, suitable ship types are ferries, naval and coastguard ships, offshore supply vessels, midsize container vessels and small cruise ships.

Below is a video of the Hull Vane integrated in superyacht Alive:

New 50m fully custom FDHF motor yacht SIBELLE delivered by Heesen Yachts

March 20, 2015

Heesen Yachts is excited to announce that March 20, 2015 saw delivery of the brand new motor yacht Sibelle (YN 16750) to her Owner. Superyacht Sibelle is a striking 50-metre fully custom vessel, below 500GT with an aluminium hull and superstructure.

Superyacht Sibelle by Heesen Yachts - Photo by Richards Vision and Heesen Yachts

Superyacht Sibelle by Heesen Yachts – Photo by Richards Vision and Heesen Yachts

The sea trials took place in the North Sea on February 13 and 17, 2015 in waves ranging between 0.5m and 1.0m in a fresh to strong wind (Force 4-5). Luxury yacht Sibelle exceeded the contractual speed and proved to be extremely manoeuvrable and very quiet.

Perry van Oossanen, naval architect, comments: “The first of a kind. A Fast Displacement Hull Form with a radical styling that includes a vertical stem and very strict requirements from the Owner, has really pushed the boundaries in yacht design. To see all this come together so beautifully after five years of hard work of designing and building, is a great feeling. All of us at Van Oossanen Naval Architects are proud to be part of this unique project!”

Motor yacht Sibelle - front view - Photo by Richards Visions and Heesen Yachts

Motor yacht Sibelle – front view – Photo by Richards Visions and Heesen Yachts

The build captain of super yacht Sibelle reports: “We are very pleased by the behaviour of Sibelle at sea. The speed trials – conducted without the use of stabilizers – took place in slightly uncomfortable seas with waves ranging from 0.5 to 1 meter, hitting us on the beam: the vessel proved to be stable and extremely manoeuvrable. The most remarkable feature is her frugal fuel consumption: at top speed (19 knots on the GPS) she uses 600 litres an hour, and at cruising speed (15.1 knots) it is only 220 litres an hour!”

Super yacht Sibelle - Photo by Richard Visions and Heesen Yachts

Super yacht Sibelle – Photo by Richard Visions and Heesen Yachts

The design of Sibelle superyacht proves that high speed cruising can be achieved without sacrificing either luxury or efficiency.

Sibelle yacht’s exterior lines are by Frank Laupman from Omega Architects, assisted in the refinement of the design details by Mikhail Labazov and Andrei Savin from Architectural Bureau A-B Studio. The complex simplicity oxymoron epitomizes in two words the philosophy that led the design team in the development of this project. M/Y Sibelle’s elegant exterior lines are emphasized by contrasting bands of wraparound glass that give her a very distinctive look. The exterior lines look like they are running parallel, but in reality they are not! It is all about small adjustments that give an impression of parallelism to the eye.

Sibelle Yacht - Photo by Richard Visions and Heesen Yachts

Sibelle Yacht – Photo by Richard Visions and Heesen Yachts

Mark Cavendish, Sales and Marketing Director at Heesen Yachts, comments: “M/Y Sibelle exemplifies Heesen’s ability to create fully custom yachts that reflect the individuality of the client. We help our visionary owners to craft their unique vessel and provide them with the highest standard of engineering developed in over 35 years of experience.”

Heesen Yachts launch 50m YN 16750 motor yacht SIBELLE

February 04, 2015

The leading Dutch shipyard, Heesen Yachts, is excited to announce that they launched the brand new Y/N 16750 motor yacht Sibelle at their facility in Oss on Friday, December 19, 2014. Superyacht Sibelle is a striking 50-metre fully custom vessel below 500GT, with an aluminum hull and superstructure. She will be tested in the North Sea and handed over to her Owner by the end of February 2015.

50m Heesen superyacht Sibelle - Photo by Dick Holthuis

50m Heesen superyacht Sibelle - Photo by Dick Holthuis

Luxury yacht Sibelle is large enough to offer her Owner and his guests everything they need without compromise. At the same time, she is also small enough to allow plenty of freedom to anchor in bays with crystal clear water.

The experienced Owner, and the Captain and his team, were deeply involved in the conception of this unique vessel. Thanks to their personal collaboration with the experts at Heesen shipyards the achieved results exceeding expectations.

Luxury motor yacht Sibelle - Photo by Dick Holthuis

Luxury motor yacht Sibelle - Photo by Dick Holthuis

While attracted by the benefits of the Fast Displacement Hull Form, the Owner requested a plumb bow; this radical and dramatic design feature implemented not only a styling tour de force, but also a dedicated study to ensure the best possible course-keeping – especially in high wave conditions – and to allow greater comfort on board.

Tank testing at the Wolfson Unit MTIA – with a free running self-propelled model in extreme wave conditions – proved the exceptional ability of the hull design; both in comfort and course-keeping, and confirmed the extraordinary high-performance figures that are inherent to the FDHF.

Superyacht Sibelle - Launching Ceremony - Photo by Dick Holthuis

Superyacht Sibelle - Launching Ceremony - Photo by Dick Holthuis

Super yacht Sibelle will be able to reach a maximum speed of 18.5 knots with only two 1.000kW MTUs installed. Hence an ocean-crossing range is achieved with minimal fuel capacity; only 45.000 litres are required to comfortably transit the Atlantic, leaving plenty in reserve.

The naval architect, Perry van Oossanen comments: The modest propeller tunnel design allows for 1.5 m diameter propellers. The hull is fitted with Quantum XT zero-speed fins, and bilge keels, offering a maximum reduction in roll angle at anchor. The design of the hull, the appendages and the propulsion arrangement have been focused on obtaining the best fuel efficiency possible, without sacrificing performance and comfort when running in waves.”

The Owner appointed Frank Laupman from Omega Architects and Mikhail Labazov and Andrei Savin from Architectural Bureau A-B Studio to create the exterior design, the general arrangement and the interior décor of Sibelle superyacht.

Motor yacht Sibelle - Photo by Dick Holthuis

Motor yacht Sibelle - Photo by Dick Holthuis

The clean and elegant exterior lines are emphasized by contrasting bands of wraparound glass.

To describe the design of Sibelle yacht the team of architects chose the oxymoron Complex simplicity: the lines look like they are running parallel, but in reality they are not! It is all about small adjustments that give an impression of parallelism to the eye.

Simplicity as the ultimate form of luxury is the design philosophy behind the cosy and inviting interior décor where the design of bleached teak wood panels creates continuous horizontal lines.

Ten guests can be accommodated in five cabins. 61 square metres are dedicated to the master suite; traditionally located forward on the main deck, she boasts two separate dressing rooms, each with a private ensuite bathroom. The four guest cabins (two VIP, one twin and one double) all have ensuite bathrooms and are positioned on the lower deck. Different light settings will reveal the genius loci of every cabin.

SIBELLE yacht - saloon

SIBELLE yacht - saloon - Photo credit to Omega Architects

Beyond their cabins, guests can enjoy 237 square metres of outdoor living space.

The main and rescue tenders are placed on the fore deck under way. When they are in the water, this vast area with opening bulwarks, transforms into a perfect party space adjacent to the sea.

This configuration allows the aft lower deck to be used as a large (21.5 square metre) beach club / wellness area equipped with sauna – accessible directly from the main saloon aft through an internal staircase.

Superyacht SIBELLE - Dining

Superyacht SIBELLE - Dining - Photo credit to Omega Architects

The design of motor yacht Sibelle proves that high speed cruising can be achieved without sacrificing either luxury or efficiency.

SPECIFICATIONS OF YN 16750 SUPERYACHT SIBELLE:

GENERAL

HULL TYPE: TWIN PROPELLER, FAST DISPLACEMENT

NAVAL ARCHITECT: VAN OOSSANEN NAVAL ARCHITECTS

INTERIOR DESIGN: OMEGA ARCHITECTS

INTERIOR DISGN ADVISER: AB STUDIO

EXTERIOR DESIGN: OMEGA ARCHITECTS

CLASSIFICATION: ABS  A1 YACHTING SERVICE  AMS

LARGE COMMERCIAL YACHT CODE LY2 / MCA

HULL: ALUMINIUM

SUPERSTRUCTURE: ALUMINIUM

DIMENSIONS

LENGTH OVER ALL: 49,90M / 163FT 8 INCHES

BEAM OVER ALL: 9,00M / 29FT 6 INCHES

DRAFT: 2,33M / 7FT 8 INCHES

DISPLACEMENT (50% LOAD): 315 TONS

ACCOMMODATION

CREW: 11

GUESTS:  10

CABINS: FULL-BEAM MASTER SUITE, TWO VIP CABINS, ONE DOUBLE CABIN, ONE TWIN CABIN

TECHNICAL DETAILS

MAXIMUM SPEED(50% LOAD): 18,5 KNOTS

RANGE AT 13 KNOTS: 3.150 NAUTICAL MILES

FUEL CAPACITY: 45.000 LITRES

FRESH WATER: 16.500 LITRES

PROPULSION DETAILS

MAIN ENGINES: 2 X MTU 8V 4000 M63

MAXIMUM POWER: 2 X 1.000 KILOWATT

GEARBOX: 2 X ZF 4600

ENGINE CONTROL: MTU BLUE VISION

PROPELLERS: SCHAFFRAN FIVE BLADE FIXED PITCH Ø 1.500 MILLIMETRES

GENERATORS: 2 X KILO-PAK, EACH 99 KILOWATT

BOWTHRUSTER: HRP 135 KILOWATT, HYDRAULICALLY DRIVEN

STABILISERS: QUANTUM XT, MODEL 2200 WITH 2 FINS OF 3.40/4.40 SQUARE METRES, ZERO SPEED

Video: 50m Heesen motor yacht SATORI

January 30, 2015

The premier Dutch builder, Heesen Yachts, has just released an amazing video, showing their multi-award winning 50m semi-displacement motor yacht SATORI (YN 152250). Launched in 2011, luxury superyacht SATORI boasts sophisticated exterior styling by renowned Omega Architects, while her stylish and elegant interiors were created by bespoke Remi Tessier. This striking vessel can comfortably sleep up to 10 guests in 5 deluxe cabins.

New 50m motor yacht SIBELLE (YN 16750) launched by Heesen Yachts

January 23, 2015

The brand new 50-metre motor yacht Sibelle (YN 16750) is believed to have been recently launched by the prestigious Dutch shipyard, Heesen Yachts. Boasting striking lines and vertical stem, superyacht Sibelle features exterior and general arrangement by Frank Laupman from Omega Architects & AB Studio. Her naval architecture is based on the revolutionary Fast Displacement Hull Form (FDFH), developed by Oossanen and Associates, allowing significant improvements in fuel efficiency. The official information and images of the latest Heesen launch are still to be released by the shipyard.

50m explorer motor yacht YN 16750 – A FDHF by Van Oossanen and Associates - Photo credit Omega Architects

Rendering of the 50m explorer motor yacht Sibelle (YN 16750) – A FDHF by Van Oossanen and Associates - Photo credit to Omega Architects

YN 16750 super yacht Sibelle is able to accommodate up to 10 guests in 5 deluxe cabins. The generous 61-square metre master suite is traditionally located forward on the main deck, boasting two separate dressing rooms, each with a private ensuite bathroom. The four guest cabins, including two VIP and two twin cabins, are all fitted with ensuite bathrooms and can be found on the lower deck. Beyond their cabins, guests can enjoy 237 square metres of outdoor living space.

Below is a gallery for the stylish charter yachts built by Heesen.

Heesen Yachts announces delivery of fully custom 51m motor yacht MySky (YN 16551)

January 12, 2015

Heesen Yachts is thrilled to announce that YN 16551 motor yacht MySky was handed over to her owners on November 28, 2014, following intensive sea trials in the North Sea. Superyacht MySky is a striking 51-metre full displacement long-range motor yacht of approximately 600GT, achieving a range of 5,400 nautical miles at 10 knots.

Heesen YN 16551 super yacht MySky - Photo by Dick Holthuis

Heesen YN 16551 super yacht MySky - Photo by Dick Holthuis

The bold but sleek exterior of luxury yacht MySky comes from the pen of Frank Laupman of Omega Architects: Flush-mounted tinted windows thermo-bonded to the superstructure create a continuous wall of glass that gives this vessel a highly distinctive look.

The owners of MySky yacht appointed world-renowned architect Erick van Egeraat to design the ultra-contemporary, sharp and sophisticated interior. A combination of crisp white leather with dark high-gloss Makassar wood and spectacularly patterned backlit white onyx inlaid within a black marble base contribute to the strongly contrasting monochrome theme. This motif is used throughout the interior producing a highly stylised, luxurious ambience.

Luxury yacht MySky - Saloon

Luxury yacht MySky - Saloon

MySky superyacht accommodates up to 12 guests in five luxurious cabins. The spacious full-beam master suite is traditionally located on the main deck forward and boasts a large, elaborate bathroom including a natural stone clad steam shower and a spacious walk-in closet. The remaining four guest cabins are located on the lower deck and furnished to the highest specifications.

Guests will enjoy life at sea both inside and on-deck: The main saloon aft, with its large circular dining table, lounge and bar area with a 6 square metres LED screen connects to the main deck aft, which features built-in settees and seats around two low coffee tables for optimum relaxation. The upper deck lounge, with its 270-degree view and stunning rotating, circular, white leather seating area, opens onto the aft terrace, accommodating a large dining table ideal for entertainment and al fresco dining under the stars, even under way. Above, the Sundeck’s large Jacuzzi, surrounded by sun-pads, is perfect for recreation, rest and repose.

Motor yacht MySky - Saloon

Motor yacht MySky - Saloon

A fully equipped gymnasium is located on the sundeck and is key to the design that has been created to satisfy the owner’s requirement for quality time for sports, physical training programmes and being in the outdoors.

Finally, the touch-and-go helicopter pad forward of the bridge can transform into another large sun terrace providing secluded lounging even when the yacht is docked stern-to.

MySky superyacht - Bar

MySky superyacht - Bar

Mark Cavendish, Sales and Marketing Director of Heesen Yachts, comments: “MySky is a very important achievement for our shipyard. Working with Erick van Egeraat and his team – who are new to yachting but are a very talented team of architects – pushed Heesen to overcome its boundaries. I believe that MySky will turn heads!”

MySky yacht - Interior

MySky yacht - Interior

SPECIFICATIONS – YN 16551 YACHT MYSKY:

GENERAL

Hull type: Twin propeller, round bilge, displacement

Naval Architect: Van Oossanen / Heesen Yachts

Exterior Design: Omega Architects

Interior Design: Erik van Egeraat

Classification: Lloyds  100A1 SSC YACHT G6  LMC

Large Commercial Yacht Code LY2 / MCA

Hull: Steel

Superstructure: Aluminium

DIMENSIONS

Length over all: 51.10 metres / 167 feet 8 inches

Beam over all: 9.60 metres / 31 feet 6 inches

Draft: 3.25 metres / 10 feet 8 inches

Displacement (50% load): 529 tons

ACCOMMODATION

Guests: 12

Cabins: Full-beam master suite, two double cabins and two twin cabins with Pullman berths

TECHNICAL DETAILS

Maximum speed (50% load): 15.6 knots

Range at 12 knots: 3,200 nautical miles

Fuel capacity: 80,000 litres / 21,130 US gallons

Fresh water: 20,000 litres / 5,280 US gallons

PROPULSION DETAILS

Main engines: 2 x MTU 12V 4000 M53

Maximum power: 2 x 1,380 kilowatt

Gearbox: 3 x ZF 7640

Engine control: MTU Blue Vision, three control stands

Propellers: Schaffran five blade fixed pitch Ø 1,700 millimetres

Main generators: 2 x Kilo-Pak, each 150 kilowatt

Emergency generator: 1 x Kilo-Pak, emergency 67,5 kilowatt

Bowthruster: HRP Europe 110 kilowatt, electrically driven

Stabilisers: Naiad Dynamics, model 820 with 4.17 m2 fins, zero speed

Below is a choice of the beautiful charter yachts built by Heesen.

Video: Heesen Yachts joining hull and superstructure of 70m motor yacht Project KOMETA (YN 17470)

January 09, 2015

The leading Dutch shipyard, Heesen Yachts, has published a video showing the joining of the hull and superstructure of their impressive 70-metre motor yacht Project Kometa (YN 17470) at the Heesen yard in Oss, the Netherlands. Scheduled for delivery in 2016, luxury mega yacht Kometa boasts a sleek, elegant profile by Espen Øino International, stylish interiors by Sinot, and the revolutionary Hull Vane technology by Van Oossanen Naval Architects.

Video: 70m Heesen motor yacht Project KOMETA (YN 17470) – Engine Test

January 05, 2015

The premier Dutch shipyard, Heesen Yachts, has recently released a video from the engine test of their impressive 70-metre motor yacht Project Kometa (YN 17470), which took place at MTU Friedrichshafen GmbH in Germany. With a sleek, elegant profile by Espen Øino International, interior by Sinot, and the revolutionary Hull Vane technology by Van Oossanen Naval Architects, the striking mega yacht Kometa represents the perfect combination of speed, space and style. The largest Heesen project to date, Kometa is due to be delivered in 2016.

Younique Yachts’ Tender to 73m motor yacht YALLA shortlisted for Tender Design Award 2015

December 29, 2014

Built for Italian shipyard CRN earlier this year, a limousine tender to the 73-metre motor yacht Yalla (CRN 132) has been shortlisted for the Tender Design Award 2015. Younique Yachts has constructed T/T mega yacht Yalla in close partnership with two other Dutch companies: Frank Laupman of Omega Architects and Van Oossanen Naval Architects.

Younique Yachts’ Tender to 73m CRN mega yacht YALLA

Younique Yachts’ Tender to 73m CRN mega yacht YALLA

The unique design by Frank Laupman was built according to the highest quality standard. T/T superyacht Yalla is 31 ft long and with a water displacement of 4500 kg it reached a top speed over 40 knots during the trial run. During the mandatory sea trials on the North Sea the tender performed exceptionally well despite the choppy water.

Younique Yachts’ TT 73m super yacht YALLA

Younique Yachts’ T/T 73m super yacht YALLA

People can board the ship on the lower aft deck or the higher foredeck, enabling the crew to help passengers get on and off board safely. A smartly designed bow ladder is available for easy access to the beach. Comfortable leather seating offers ample room to sit for 12 persons. To keep the temperature at a pleasant level, a double climate control system has been installed. The crew in the cockpit has a good view of the accommodation and can swiftly and easily reach the engine and installations.

Frank Laupman listened to the owner’s wishes and designed a tender that is just good-looking and representative as the mother yacht. The lay-out of its teak decks, the unique colouring of the window glass, the paint job, the leather and the finishing… Everything was designed and executed with the mother yacht in mind. The windows of the Tender to super yacht Yalla are real eye-catchers. The specialists of Younique Yachts custom built the 12 separate windows to form a sleek and smooth whole.

Younique Yachts’ TT 73m motor yacht YALLA - Interior

Younique Yachts’ T/T 73m motor yacht YALLA - Interior

Unity and uniformity is what Younique Yachts is all about. Windows, door fittings, fender hooks and all other separate parts need to form a balanced unity.

New range of tenders

Younique Yachts is currently working on the design of a new range of 9.5m tenders. “The new range will be based on three different models,” says Egbert Wattel of Younique Yachts, “a Supply Tender for crews, a Sports Tender for owners and a Limousine Tender for official transfers. In the years ahead Younique Yachts will be offering these new models as well as its custom built products to the mega yacht industry.”

“The new range reflects our philosophy. We listen to the end user’s wishes and use our joint knowledge and experience to make all these wishes come true.” Younique Yachts is developing the new range in cooperation with trusted partners Omega Architects (Frank Laupman) and Van Oossanen Naval Architects.

42m ALIVE yacht by Heesen Yachts completes her sea trials

November 20, 2014

42m ALIVE yacht by Heesen Yachts, featuring a Hull Vane®, has completed her sea trials with great success, exceeding the contractual speed by 0,5 knots. The sea trials of YN 17042 superyacht ALIVE have taken place in open waters in a slight sea state (0,70m waves) with 3-4 SW winds.

Heesen HY17042 yacht ALIVE by Heesen Yachts

Heesen HY17042 yacht ALIVE by Heesen Yachts

Motor Yacht Alive reached the remarkable maximum speed of 16.4 knots, exceeding the contractual speed by 0.5 knots!

The contractual fuel consumption prediction proved to be correct: 4000nm at 12 knots. Over 750 miles come free of charge thanks to her remarkably frugal fuel consumption, that is 30 per cent less than on a conventional displacement yacht.

Luxury yacht ALIVE by Heesen Yachts

Luxury yacht ALIVE by Heesen Yachts

This is an important achievement and statement for this Dutch shipyard, as Alive superyacht is the first luxury vessel equipped with Hull Vane®.

The Hull Vane® is an under water foil that harnesses waves to produce power; this in combination with the Fast Displacement Hull Form and conventional diesel engines produces remarkable results. Proven during independent research conducted by Van Oossanen Naval Architects at two of the world’s most respected hydrodynamic laboratories — Wolfson Unit and Marin — it is today confirmed at sea.

Superyacht ALIVE by Heesen Yachts

Superyacht ALIVE by Heesen Yachts

Luxury yacht Alive was delivered to her Owners on November 4, 2014.