Fast Displacement Hull Form Brief

Fast Displacement Hull Form Luxury Yacht Charter & Superyacht News

Heesen Yachts announces sale of the first 55m motor yacht YN 17255

February 20, 2013

Heesen Yachts is pleased to announce that it has signed the contract for the first ever 55m steel fast displacement motor yacht YN 17255. The all-new superyacht YN 17255 has been sold thanks to a beneficial collaboration with a family office “Bilderlings Wealth”, which represents the client as well as manages the project. YN 17255 is scheduled for delivery in Summer 2015.

55m Heesen fast displacement superyacht YN 17255

55m Heesen steel fast displacement superyacht YN 17255 - Photo credit: Heesen Yachts

The Heesen 55m steel fast displacement yacht YN 17255 was first introduced at “The future is now” Press conference held at the Monaco Yacht Club during the 2012 Monaco Yacht Show, where this Dutch shipyard presented several new models: as well as the 55m steel fast displacement, the 42m fast displacement equipped Hull Vane® – sold even before it was officially introduced on the market – and the 45m fly bridge.

Working with the most radical thinkers, these three new yachts were developed to overcome seemingly opposing attributes: to go faster but use less fuel, to increase range and speed, to increase performance but reduce environmental impact, to enable uncompromised interior design without compromising performance.

Luxury yacht YN 17255, whose fast displacement hull form was developed by Van Oossanen Naval Architects, will reach the remarkable maximum speed of 16,5 knots with a range of 4.500Nm at a cruising speed of 13 knots.

Heesen luxury yacht YN 17255 - aft view

Heesen luxury yacht YN 17255 - aft view Photo credit: Heesen Yachts

Perry van Oossanen comments: “The 55m marks the 10th Heesen for which Van Oossanen Naval Architects have provided the naval architecture package, and the 4th based on the successful Fast Displacement Hull Form (FDHF). We believe the 55m will set a benchmark in terms of efficiency: Propelling around 600 tons of steel and aluminum at 15 knots with only 600kW of power is quite remarkable.”

Frank Laupman from Omega Architects created the elegant lines of this new Heesen 55 metre. Superyacht YN 17255 also boasts extensive outdoor spaces with its 110 square metre sun deck and a 70 square metre Owner’s private terrace located forward. Tenders and toys are stored in the garage located at the front of the vessel and launched from the two gull-wings doors on each side; hence the lazarette can be dedicated to a wide beach club and gym with a generous swim platform that allows the Owner and guests to swim and relax right at the sea’s edge.

Twelve guests are accommodated in six cabins: the master suite traditionally located on the main deck forward features a side recessed balcony; a full beam VIP on the lower deck alongside two twins and two doubles.

Specifications of the latest Heesen superyacht YN 17255:

GENERAL
Hull type: Twin propeller, fast displacement
Naval Architect: Van Oossanen / Heesen Yachts
Exterior Styling: Omega Architects
Classifi cation: Lloyds  100A1 SSC YACHT G6  LMC, UMS
Large Commercial Yacht Code LY3
Hull: Steel
Superstructure: Aluminium

DIMENSIONS
Length over all: 55,00m / 180ft
Beam over all: 9,60m / 31ft 6in
Draft: 3,15m / 10ft 4in
Displacement (50% load): 600 tons

TECHNICAL DETAILS
Maximum speed (50% load): 16,5 knots
Range at 13 knots: 4.500Nm
Fuel capacity: 100.000 litres / 26.420 US gallons
Fresh water: 25.000 litres / 6.604 US gallons

PROPULSION DETAILS
Main engines: 2 x MTU 12V 4000 M53
Maximum power: 2 x 1.380kW
Gearbox: 2 x ZF 5356
Engine control: MTU Blue Vision
Propellers: Scha ran fi ve blade fi xed pitch
Main Generators: 2 x Kilo-Pak 175kW
Emergency Generator: 1 x Kilo-Pak 80kW
Bowthruster: HRP 125kW electrically driven
Steering system: Litton Marine Systems
Stabilizers: Naiad Dynamics, zero speed

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

Heesen Yachts Charter Yacht Images

Motor Yacht Quinta Essentia - Main
Motor Yacht Quinta Essentia - Main
Motor Yacht Quinta Essentia - WaterSport Toys
Motor Yacht Quinta Essentia - ...
Motor Yacht Quinta Essentia - At Anchor
Motor Yacht Quinta Essentia - At Anchor
Motor Yacht Quinta Essentia - Aft Deck
Motor Yacht Quinta Essentia - Aft Deck
Motor Yacht Quinta Essentia - Main Salon
Motor Yacht Quinta Essentia - Main ...
Motor Yacht Quinta Essentia - Main Salon 2
Motor Yacht Quinta Essentia - Main ...
More: Heesen Yachts Image Gallery

Heesen presents new FDHF superyacht range at ‘The future is now’ press conference

September 19, 2012

Heesen Yachts have presented their new FDHF superyacht range to the yachting community at ‘The future is now’ press conference in the in the Principality of Monaco. The new Heesen range ‘The future is now’ was presented on September 19, 2012 at the Yacht Club de Monaco by Heesen directors Fabio Ermetto and Hans Boerakker, together with Piet and Perry van Oossanen from Van Oossanen Naval Architects and Frank Laupman from Omega Architects.

Fabio Ermetto, Director of Sales and Marketing said: “Heesen is moving in a new direction. In fact, four new directions. And in doing so, we want to ensure that different means better. Our four concepts have advantages over every other yacht built at their size: 65, 55, 45 and 42 metres. New considerations are becoming a priority and innovative technology is required. Working with the most radical thinkers, these four yacht forms were developed to overcome seemingly opposing attributes: to go faster but use less fuel, to increase range and speed, to increase performance but reduce environmental impact, to enable uncompromised interior design without compromising performance.”

The 65m FDHF Project Omnia was presented in 2010 at the YCM and – right after – it was sold to a Heesen repeat client. Researched by the world’s leading maritime engineers, the 65’s revolutionary fast displacement hull is the most efficient yet tested. This yacht has the highest power to weight ratio of any comparable yacht. Efficiency is the most important element for yachts of the future, for the very simple reason that it delivers something utterly remarkable: higher performance and lower running costs. The delivery of the largest Heesen to date, the 65m Heesen FDHF superyacht project Omnia is slated for June 2013.

Heesen Yachts - FDHF motor yacht project Omnia - Photo credit Justin Ratcliffe

Heesen Yachts - FDHF motor yacht project Omnia - Photo credit Justin Ratcliffe

65m FDHF Heesen Superyacht project Omnia

65m FDHF Heesen Superyacht project Omnia

The 55m FDHF motor yacht by Heesen is the world’s first steel yacht over 50 metres with a fast displacement hull. She is the most fuel efficient yacht of her size and style available on the market. With an impressive sundeck of 110 square metres and a forward touch-and-go helipad of 70 square metres, she offers a wide range of choices in her layout.

The 55m FDHF motor yacht by Heesen

The 55m FDHF motor yacht by Heesen

The Heesen 45m superyacht is the only big sports yacht built in Holland, boasting Dutch quality, an aluminium hull and power that can deliver 30 knots. A staggering feat of naval architecture: 40 metres of deck space, 30 metres of interior space in a yacht of 45 metres overall. The Heesen 45m is the perfect combination of both power and style.

The Heesen 45m superyacht

The Heesen 45m superyacht

The Heesen 42m FDHF yacht equipped with Hull Vane® is the most dramatic advance in yachting: The first yacht that harnesses waves to produce power. Thanks to a special underwater wing developed by Van Oossanen Naval Architects, her efficiency is increased by an astonishing 35 per cent for speeds up to 15,9 knots. Cruising speed fuel consumption is reduced by 30 per cent and she has a 4.000 mile range – the longest of any 40 metre yacht. Reduced emissions means reduced environmental impact. The first Heesen 42m with Hull Vane® was sold last May and is due for delivery in 2014.

The Heesen 42m FDHF yacht equipped with Hull Vane®.

The Heesen 42m FDHF yacht equipped with Hull Vane®.

The Heesen 42m FDHF motor yacht equipped with Hull Vane®

The Heesen 42m FDHF motor yacht equipped with Hull Vane®

The presentation of the three new models and the update on the revolutionary 65m FDHF shows that Heesen is a shipyard that is in continuous quest for smarter innovation: forward thinking for a better future in yachting.

Heesen’s order book consists of 10 yachts currently in commission with deliveries that run until 2015, 60 per cent of which are made out of aluminium, confirming that construction with this noble metal continues to represent the core business of this Dutch shipyard

Photo credits: Dick Holthuis and Justin Ratcliffe

The 20th Anniversary of the Van Oossanen Naval Architects studio

February 16, 2012

The Dutch design studio, Van Oossanen Naval Architects celebrated its 20th anniversary on 26th January, hosted by the founder of the studio, Peter van Oossanen. It was also a good occasion to welcome two new shareholders of the company, Perry van Oossanen and Niels Moerke. One of the examples of an excellent work of this renowned studio is the revolutionary Fast Displacement Hull Form (FDFH) used on the Heesen 50m explorer yacht YN 16750.

Heesen 50m motor yacht YN 16750 with FDHF by Van Oossanen Naval Architects Photo credit Omega Architects

Heesen 50m motor yacht YN 16750 with the FDHF by Van Oossanen Naval Architects - Photo credit: Omega Architects

As members of half a dozen America’s Cup design teams and thanks to their continuous work on yachts, commercial & military vessels, Van Oossanen Naval Architects have developed and implemented cutting edge design technology and used that technology in hundreds of designs.

The results of intensive commercial research campaigns as well as their own in-house research projects, provide them with the knowledge and the understanding of the underlying physics and principles of what constitutes an optimum design, as well as a thorough knowledge of the driving features in each new concept.

Together with their practical experience obtained on the water, this is of paramount importance when making important decisions in the earliest design stage, and when optimizing the design in the final design stage to meet each requirement in the design brief.

Nowadays, Van Oossanen Naval Architects are as often approached by yards as they are by private clients to develop new concepts and provide the associated preliminary and final design. Often they manage the tendering process for private clients, as well as the detailed engineering and project management for yards.

65m Heesen FDHF yacht YN 16465′s superstructure and hull joined

January 27, 2012
Heesen Yachts are proud to announce that last year, in December, 2011 the hull and the superstructure of the 65m YN 16465 Heesen FDHF superyacht were joined together. The construction of the hull and superstructure of Heesen YN 16465 yacht started in December 2011 at the facility in Oss, and marked the culmination of years of meticulous planning.

FDHF superyacht YN 16465 - Photo Justin Ratcliffe

FDHF superyacht YN 16465 - Photo Justin Ratcliffe

Frank Laupman, from Omega Architects, who are responsible for the exterior design, was delighted: “Being able to see the joining of the hull and superstructure is a great thing for me – who drew the first sketch that was just some 40cm long. Today I can finally see that the lines I sketched on paper more than two years ago, work in reality.”

65m FDHF YN 16465 superyacht under construction at Heesen Yachts - Photo credit to Justin Ratcliffe

65m FDHF YN 16465 superyacht under construction at Heesen Yachts - Photo credit to Justin Ratcliffe

The revolutionary Fast Displacement Hull Form (FDHF) was developed by Van Oossanen and Associates and  was very keen to see the results of their work: “It is always exciting to see a project materialize. However, on a project like this, of this size, with so much effort put in the development prior to construction, it is three times the excitement. To see the high level of quality Heesen has put in the hull construction, and it being combined with the superstructure for the first time, is very thrilling.”

Heesen Yachts 65m FDHF superyacht YN16465 - Photo credit Dick Holthuis

Heesen Yachts' 65m FDHF superyacht YN16465 - Photo credit Dick Holthuis

The FDHF uses innovative techniques in the construction of its decks, bulkheads and part of the superstructure plating. 300mm wide extruded aluminium plates are welded together using a ‘friction-stir’ technique to form huge plates 2,5 metres by 12 metres in size. Essentially this means the plates are welded together without adding welding material: this method, developed by NASA, has the enormous benefit of creating less heat during the welding process. The result is a large plate with uniform mechanical properties and much fairer and smoother construction. As ever, the famously high quality Heesen building process begins at the very first rung of construction.

65m Heesen FDHF yacht YN 16465 - Dick Holthuis

65m Heesen FDHF yacht YN 16465 - Dick Holthuis

Dickie Bannenberg of Bannenberg and Rowell Design, responsible for the interior design of the 65m motor yacht YN 16465 comments: “Looking at the metal work you can sense the precision at the yard and see the result of immaculate teamwork. Even sitting in the water in bare metal, the yacht exudes speed and intent. We can’t wait for our interior to go in.”

Heesen Yachts' YN 16465 65m FDHF superyacht - Photo credit to Dick Holthuis

Heesen Yachts' YN 16465 65m FDHF superyacht - Photo credit to Dick Holthuis

When combined with sophisticated naval architecture, the improved construction techniques result in a vessel that is 30% more efficient than a round-bilge motor yacht. The Heesen 65m FDHF superyacht’s advanced design combining a narrow beam with a specific hull form results in a very low wave profile over the entire speed range, while also improving its sea-keeping and manoeuvrability. This provides a very positive impact on the cost of running the yacht, as well as the lowering of its environmental footprint due to reduced engine emissions.

Heesen Yachts - FDHF motor yacht YN 16465 FDHF - Photo credit Justin Ratcliffe

Heesen Yachts - FDHF motor yacht YN 16465 FDHF - Photo credit Justin Ratcliffe

Fabio Ermetto, Sales and Marketing Director at Heesen Yachts sums up the project: “Heesen Yachts is well known in the yachting industry for being a shipyard that likes challenges. We are proud to be the first shipyard to build a yacht featuring this innovative hull configuration, the Fast Displacement Hull Form by Van Oossanen, which is the perfect platform for creating a new luxury yacht in which increased performance and reduced environmental impact begin with the hull design. It is very exciting, one year after the keel laying ceremony, to see that the project is taking shape!”
65m Heesen FDHF superyacht YN 16465 is now in the outfitting stage in the enlarged and renewed dry dock in shed no. 5 at the Heesen facility in Oss, the Netherlands. Her delivery is scheduled for June 2013. Join in the excitement and buzz surrounding YN 16465 and the FDHF by watching the time lapse “making of” movie as well as the documentary showcasing the joining of hull and superstructure on the Heesen YouTube channel.
Main characteristics
Hull type: Aluminium
Naval Architect: Van Oossanen – Heesen Yachts
Exterior Designer: Omega Architects
Classification: ABS X A1 Yachting Service X AMS Large Yacht Code LY2 / MCA
Hull material: Aluminium
Superstructure material: Aluminium
Dimensions
Length over all: 65,00 metres
Beam over all: 11,40 metres
Draft propellers max.: 3,05 metres
Displacement (50% load): 550 tons (approx.)
Technical details
Speed maximum (half load): 27,0 knots
Speed cruising (half load): 24,0 knots (at approx 75% engine power output)
Range at 14 knots: 4.500 Nm
Classification
ABS X A1 Commercial Yachting Service X AMS
Large Yacht Code 2
Guests: 12
Crew: 13 (including captain)
Fuel capacity: 90,0 m3
Fresh water 30,0 m3
Fresh Water capacity: 30,0 m3
Main engines: 2 x MTU 20V4000M93L, each developing 4.170kW at 2100 rpm
Gearboxes: 2x ZF 23560
Propulsion: Stainless steel shafts with 5 blade fixed pitch props
Stabilisation (at zero speed): 5x Seakeeper gyroscopes, M21000

New Heesen 65m Motor Yacht due to be launched in 2013 with the Seakeeper M21000 Gyros

January 25, 2012

When a yacht builder premieres an excellent engineering advance, other components must be equally revolutionary. Twenty years in development, Heesen Yachts‘ Fast Displacement Hull Form (FDHF) debuts on its new 65m motor yacht, the first of which is due to be launched in 2013. To provide underway and at anchor stabilization for the unique 65m superyacht design, Heesen has chosen Seakeeper M21000 gyros as standard equipment.

Heesen 65m Yacht - the world's first fast displacement yacht

Heesen 65m Yacht with the Seakeeper Gyros Standard - the world's first fast displacement vessel

Nearly a year into her construction at the Heesen shipyard, this is the world’s first fast displacement yacht. The recently-delivered Seakeeper gyros, 5 units for this 65m craft, will be installed with the assistance of Seakeeper’s Dutch distributor, Kemper en Van Twist Diesel.

Heesen’s FDHF incorporates features that affect hydrodynamic resistance over the entire speed range, such as the limited immersed transom, bulbous bow, trim control and spray rails for a 30% increase in hull efficiency. When paired with the yacht’s MTU M93L engines, it will have a 4,200 nm range with 20 knot cruising speeds and a top speed of 27 knots.

With such a unique hull design, it’s not possible to use external appendages, such as stabilizing fins, that could affect performance. Housed completely inside the lightweight, efficient Heesen hull, the Seakeeper gyros will provide power-saving stabilization while the yacht is underway, at zero speed or at anchor.

The powerful righting torque of each M21000 gyro results from a steel flywheel spinning at high speeds in a vacuum, within an aluminum housing. Drawing a miserly 3 kW at full speed, each gyro delivers 21,000 Newton meter seconds of angular momentum to achieve up to 80% roll reduction. This ensures owners and guests are comfortable, and safe, onboard in varying sea conditions.

Luxurious amenities on this remarkable Heesen yacht design include a duplex beach club, glass-bottom swimming pool, 10 sq.m side balcony, a vast sundeck, and accommodations for up to 12 guests in custom-built quarters. Seakeepers’ steadying force will be particularly appreciated on the touch-and-go helicopter deck and in the multiple yacht tender garages.

Heesen Yachts sell 50m explorer motor yacht YN 16750 – A FDHF by Van Oossanen and Associates.

November 02, 2011

Heesen Yachts is proud to announce the sale of YN 16750, a 50 metre explorer motor yacht whose naval architecture is based on the FAST DISPLACEMENT HULL FORM (FDHF) by Van Oossanen and Associates, with an exterior and general arrangement by Frank Laupman from Omega Architects & AB Studio. Motor yacht YN 16750 is an all-aluminium explorer yacht that measures 50 metres in length and weighs below 500GT. The 50m Heesen yacht YN 16750 boasts striking lines and vertical stem, and will be fully custom-built for delivery in 2015.

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

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

The revolutionary Fast Displacement Hull Form (FDFH) developed by famous Dutch naval architects Van Oossanen and Associates allows significant improvements in fuel efficiency. Thanks to the FDHF’s low resistance characteristics, the YN 16750 superyacht will reach a maximum speed of 18,5 knots with only two 1.000kW MTUs installed. Therefore, an ocean-crossing range is achieved with minimal fuel capacity. Only 45.000 litres are required to comfortably transit the Atlantic, leaving plenty of reserve.

Perry van Oossanen, naval architect at VOA, comments: “Modest propeller tunnels have been defined allowing for 1,5m diameter propellers. The hull will be fitted with Quantum XT zero-speed fins, and bilge keels, allowing for a maximum reduction in roll angle when 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.”

Carrying less fuel also means that the yacht is lighter which further improves efficiency. And the benefits don’t end there; the space saved by having smaller fuel tanks has been reallocated to provide the crew with valuable storage volume under the crew mess.

The Owner commissioned Frank Laupman from Omega Architects & AB Studio to design the exterior and general arrangement of the Heesen 50m yacht YN 16750. Her clean and elegant lines are emphasized by contrasting bands of wraparound glass. To describe the exterior design of YN 16750, AB Studios & Frank Laupman 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 the eye the impression of parallelism.”

The YN 16750 supearycht has a cosy and inviting interior décor that will be based on the colour contrast between swamp oak panelling and dark joinery details. The luxury motor yacht YN 16750 will be able to accommodate up to ten guests in five beautifully appointed cabins.  61 square metres are dedicated to the master suite, traditionally located forward on the main deck, which boasts two separate dressing rooms, each with a private ensuite bathroom. The four guest cabins including two VIP and two twin cabins all have ensuite bathrooms and are positioned on the lower deck. 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, while the toys are stored in the forward garage. This configuration allows the aft part of the yacht to be used as a large (21,5 square metre) beach club equipped with sauna and hammam.

The design of YN 16750 explorer motor yacht proves that high speed cruising can be achieved without sacrificing either luxury or efficiency.

Main characteristics of the M/Y YN 16750 by Heesen Yachts

Hull type:             Twin Propeller, round bilge, fast displacement motor yacht
Naval Architecture:         Van Oossanen and Associates
Exterior Designer:    Omega Architects & AB Studios
Interior Designer:    Omega Architects & AB Studios
Interior Design Adviser:        AB Studio
Classification:     ABS, A1 Commercial Yachting Service, AMS
Large commercial Yacht Code (LY2) by MCA
Hull:   Aluminium
Superstructure:   Aluminium

DIMENSIONS
Length over all: 49,90m
Beam over all:   9,00m
Draft:    2,15m
Displacement (approx. 50% load):            315 tons

TECHNICAL DETAILS
Maximum speed (50%load):       18,5 knots
Range at 13 knots:           3.150Nm
Fuel capacity:     45.000 litres
Fresh Water capacity:    16.500 litres

PROPULSION DETAILS
Main engines:   2 x MTU 8V 4000 M63L
Maximum power:            2 x 1.000kW
Generators:       2 x Kilo-Pak, each 99kW at 50Hz

Heesen Yachts lay the keel of YN 16465 – a 65m Fast Displacement Superyacht (FDHF)

February 08, 2011

Heesen Yachts lay the keel of a 65-metre Fast Displacement motor yacht with interior by Bannenberg and Rowell for delivery in June 2013.

Heesen Yachts is proud to announce the keel laying of YN 16465 – a 65-metre Fast Displacement motor yacht, the ceremony for which took place in shed 6 – the metalwork shop – at Heesen’s shipyard in Oss, the Netherlands.

Keel laying Ceremony for the 65-metre Fast Displacement motor yacht HY16465 at Heesen Yachts - Photo Credit Dick Holthuis

Keel laying Ceremony for the 65-metre Fast Displacement motor yacht HY16465 at Heesen Yachts - Photo Credit Dick Holthuis

Ceremonial welding of a memorial plate to the structure of Heesens’ HY16465 65m Fast Displacement Hull Form (FDHF) Superyacht - Photo Credit Dick Holthuis

Ceremonial welding of a memorial plate to the structure of Heesens’ HY16465 65m Fast Displacement Hull Form (FDHF) Superyacht - Photo Credit Dick Holthuis

The Heesen hull YN 16465, started last December and due for completion in January 2012, exhibits some interesting new techniques in the construction of its decks, bulkheads and part of the superstructure plating. Extruded aluminium plates of 300mm wide are welded together using a ‘friction-stir’ technique to form huge plates of 2,5 metres x 12 metres. In simple words the plates are welded together without adding welding material. This method, developed by NASA, has the enormous benefit of creating less heat during the welding process. The result is a large plate with uniform mechanical properties and much fairer and smoother construction. The famously high quality Heesen building process is always begun at the very first rung of construction.

Heesen Yachts lay the keel of YN 16465 - a 65m Fast Displacement Superyacht (FDHF)

Heesen Yachts lay the keel of YN 16465 - a 65m Fast Displacement Superyacht (FDHF)

When combined with sophisticated naval architecture, this improved construction technique results in a vessel that is 30% more efficient than a round-bilge motor yacht. Heesen’s 65m FDHF’s advanced design combines narrow beam and a special hull form to result in a very low wave profile over the entire speed range, while also improving its sea-keeping and manoeuvrability. This provides a very positive impact on the cost of running the yacht, as well as the lowering of its environmental footprint due to lower engine emissions.

The Owner appointed the award-winning design studio, Bannenberg and Rowell to create the interior of the radical 65-metre Fast Displacement YN 16465 superyacht.

Work Begins on 65 Metre Superyacht at Heesen - Salon View

Work Begins on 65 Metre Superyacht at Heesen - Salon View

65m Fast Displacement Hull Form (FDHF) Motor yacht by Heesen with interiors by Bannenberg and Rowell

65m Fast Displacement Hull Form (FDHF) Motor yacht by Heesen with interiors by Bannenberg and Rowell

Dickie Bannenberg comments: “To complement such a dynamic and sleek exterior design, we knew that we would have to produce an interior with the same qualities. This task gave us a rare opportunity to take advantage of the additional space provided within Heesen’s largest ever build. We have already begun concept work on the main deck saloon and dining areas and very much look forward to designing the really exciting beach club, which will be located beneath the pool. An “infinity loop” floor plan allows for neat zoning of spaces, with living and seating aft, dining forward and a free standing bar positioned opposite a fireplace, thus making dramatic design capital out of this potential ‘no-man’s land’ located midships between the engine room air ducts.”

Heesen's 65m Fast Displacement Hull Form (FDHF) Superyacht Salon by Bannenberg and Rowell

Heesen's 65m Fast Displacement Hull Form (FDHF) Superyacht Salon by Bannenberg and Rowell

Work Begins on 65 Metre FDHF Superyacht at Heesen

Work Begins on 65 Metre FDHF Superyacht at Heesen

Motor yacht YN 16465, a Heesen 6500 FDHF is due for delivery in June 2013.

YN 16465 Main Characteristics
LOA: 65,00 metres  
Beam (maximum): 11,40 metres  
Draught (maximum): 3,05 metres  
Naval Architecture:    Heesen Yachts and VOA  
Exterior Styling:    Omega Architects  
Interior Design: Bannenberg & Rowell  
Displacement (half load): 550 tonnes (approx.)  
Fuel Capacity: 90 m3  
Fresh Water Capacity 30 m3  
     
Speed – maximum (at half load): 27 knots  
Speed – cruising (at half load): 24 knots (at approx 75% engine power output)  
Range at 14 knots 4.500 Nm  
Class: ABS, XA1 Commercial Yachting Service, XAMS,
Large Yacht Code 2		  
Guests: 12  
Crew: 13 (including captain)  
Main engines: 2x MTU 20V4000M93L, each developing 4.170kW
at 2.100rpm		  
Gearboxes: 2x ZF 23560  
Propulsion Stainless steel shafts with 5-blade, fixed pitch props  
Stabilisation at zero speed: 5x Seakeeper gyroscopes, M21000  

Van Oossanen & Associates’ Fast Displacement Hull Form (FDHF) Motor yacht Concept Gaining Ground

December 21, 2010

The Fast Displacement Hull Form concept (FDHF, patent pending), by Van Oossanen & Associates was presented to a scientific audience a little more than a year ago at the FAST 2009 Conference, followed in April 2010 by the first publication of the Heesen 6500 FDHF. Van Oossanen & Associates (VOA) have now secured orders for the naval architecture of 6 more FDHF motor yachts.

Heesen Yachts 6500 FDHF

Heesen Yachts 6500 FDHF

In July 2009, when Heesen Yachts were looking into the possibility of a 65 meter yacht as their new flagship, Dutch naval architects Van Oossanen & Associates had just completed the development of a break-through in hull design.   Van Oossanen & Associates convinced Heesen to adopt this new hull form, the FDHF, because the new performance driven 65 m was the perfect platform to use as a prototype for this hull form. The Heesen 6500 FDHF is currently under construction.

Efficiency and Flexibility

The FDHF offers a solution to the problem of having to develop different hulls for the displacement and semi-displacement modes of operation. The FDHF hull is efficient in both speed ranges and thus offers great flexibility when wanting a semi-custom series for a wide speed range because the naval architecture and engineering do not require changing when the speed requirements change – as long as the engine room is sized for both small and large engines.

Tank tests for the FDHF at a corresponding full-scale speed of 24 knots.

Tank tests for the FDHF at a corresponding full-scale speed of 24 knots.

An additional benefit of the FDHF is that it has significantly lower resistance values in the semi-displacement speed range than comparable hard chine hull forms. Often this is seen to be around 15% less resistance, which directly translates into lower required power levels to achieve the required speed. This superior performance at semi-displacement speeds does not compromise the performance at lower speeds. At cruising speeds the FDHF is as efficient as a well-designed round bilge displacement hull form. Model tests have proven the concept without a shadow of doubt.

On the Drawing Board

At the closure of 2010 six different designs based on the FDHF are on the drawing board at VOA. Two of these are smaller motor yachts: the Rivocean 1900 and the Storm 72, ordered by Dutch yards. Both of these have a maximum speed of well over 20 knots, and are required to be exceptionally fuel economic at lower cruising speeds. Another two designs of these are 50 meter, 500 GT motor yachts: a fully custom yacht for a private client, and the lead vessel of a series of semi-custom yachts for RMK Marine. The first 3 of these yachts are to a concept designed by Omega Architects, while for RMK Marine both Omega Architects and Espen Oeino have prepared a design. The Ghost Yachts series (G180, G180V and the G180H) are also under development. An exciting new FDHF project that has come just before the end of the year is a 73 meter motor yacht, also for a private owner. Furthermore, a number of yards, including some of the top yards in The Netherlands, as well as abroad, is currently considering the FDHF for their new designs, as a step up from current technology.

The Storm 72, featuring the FDHF hull form.

The Storm 72, featuring the FDHF hull form.

Further Refinements

Meanwhile Van Oossanen & Associates have not stopped the development of the FDHF. The concept has been refined further since the first design in 2009. Research at VOA is now focused on optimizing the FDHF for a vertical stem configuration.

The Omega concept for RMK Yachts, featuring the FDHF hull form.

The Omega concept for RMK Yachts, featuring the FDHF hull form.

For this, and for other general hydrodynamic optimization work, VOA is developing a fully automated optimization routine which features the Friendship Framework as a parametric modeler and optimizer, in combination with the fully viscous RANSE solver ISIS-CFD from Fine/Marine. Further model testing will take place in the course of 2011.