28 April 2010

In november 2009, we signed a contract with Heesen Yachts to design their new 65m flagship, details of which were unveiled yesterday (27 April 2010). The 6500 FDHF is based on Van Oossanen & Associates' Fast Displacement Hull Form (patent pending). The Fast Displacement Hull Form (FDHF) is a new and innovative hull form with significantly lower resistance than those of well-designed conventional round bilge and hard chine hulls. Furthermore, the FDHF achieves a good over-all performance rather than only achieving optimum performance at maximum speed, while also improving seakeeping and manoeuvrability. This results in an improved economic efficiency and less environmental impact in terms of engine-emissions.

The Heesen Yachts 6500 FDHF platform was the result of an elaborate conceptual design study carried out by Van Oossanen & Associates. The result of which was a platform for Omega Architects to base their novel exterior styling on. More than half a year of further development and naval architecture has blended the exterior styling with the radical new platform into a thrilling yacht.

Van Oossanen & Associates b.v. have been involved with all of the performance aspects of the yachts built at Heesen for more than 15 years and have carried out the complete naval architecture for Galactica, Man of Steel, Sky, the 4000 Semi-Displacement series, the 5000 Displacement Series, the 5000 Semi-Displacement series, the 5500 Displacement Series and now the 6500 Fast Displacement Hull Form series.

The FDHF concept was first published to the scientific community, at the FAST 2009 conference in Athens, October 2009. Since then the FDHF has attracted much attention from private clients, yacht builders, designers as well as clients and yards outside of the yachting industry. Currently the FDHF is under development for a number of different projects, for different clients in a range of different applications.

Read more about the FDHF here here or in the May issue of The Yacht Report.
February 2010

At Boot Holland 2010 the first details of our new 15.5m Vissermanaak were shown to the public at the stand of Dirk Blom.

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19 October 2009

We have made available documentation on Peter's involvement in the design of "Australia II". We want to start on the events associated with the patent application. Read..
15 October 2009

From sail-world.com: "Noted America’s Cup historian John Rousmanière reflects on the current brouhaha over the designer of Australia II’s winged keel.." Read..
October 2009

We will be present at the Klassieke Schepenbeurs. We would like to invite you to our stand and pay a visit to the "Fleanende Ingel", our new 13.5m lemsteraak design. Please contact us before the show for an appointment.
October 2009

At the 10th International Conference on Fast Sea Transportation, Athens, Greece, October 5-8, we have published about our new hull form concept for semi-displacement motor yachts..

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October 2009

Article about Van Oossanen & Associates b.v. in Professional Boatbuilder, October / November 2009:

The Hydrodynamicist
October 2009

We recently added some more publications to the downloads sections:

Design and Construction of the America's Cup Yacht "Challenge Australia" (1992)

Resistance Prediction of Small High-Speed Displacement Vessels: State of the Art (1980)

Trade-Offs in Sub-Cavitating Propeller Design - The Role of Cavitation in Propeller Design (1974)
May 2009

We recently completed the preliminary naval architecture work and feasibility study for this new 50m motor yacht, aimed at top speeds of over 25 knots. The concept features a novel hull form concept, about which we will publish later. Read more..

This new design is a 54m all-aluminum motor yacht, designed for speeds of over 30 knots. Van Oossanen & Associates carried out the preliminary naval architecture and feasibility study. Currently this project is being tendered. Read more..

This new 65m design, aimed at a top speed of about 19 knots, for which Van Oossanen & Associates carried out the preliminary naval architecture and feasibility study, is currently being tendered to various yards. Read more..
March 2009
Vitters Shipyard requested us to carry out a detailed structural strength analyses using Finite Element Model software..

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February 2009
Magazine Motorjacht has published an article on our design of the Gulliver 1220 in their February edition.

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February 2009
This month the keel laying ceremony at the Laky Verf of our 45m Steel/Aluminium Displacement Motor Yacht design to a concept by Omega Architects, took place..

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January 2009
We are currently working on the concept and design of this new 37m sailing yacht for Cyrus yachts..

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January 2009
Early in the new year we finished the naval architecture work for the newest Heesen Series of which the first is denoted YN 15555. Mid 2008 we had already finished the naval architecture work for their new 4000 series of which the first hull will be YN 15640.

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October 2008
We have recently finished the design and naval architecture of this new 42m all-composite displacement motor yacht, to be built at Cyrus Yachts..

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September 2008
VOA carried out a research project into different factors influencing the sailing performance of the Regenboog..

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August 2008
The first two Gulliver 1220s, the first boat, 'Swift', equipped with two Yanmar 6BY-220 engines, and the second equipped with two Yanmar 6BY-260, will be present at the HISWA te Water in IJmuiden. The team at Poldijk have done an extraordinary job in building two boats in only a 4 month period.

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June 2008
This first 13.5m Lemsteraak of a new series was recently launched. The first races she competed in, in 2008, were won, demonstrating the speed potential of this design.

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March 2008
A new design, styled on a pre-war naval torpedo boat..

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February 2008
The influence of a working propeller on the alignment of the struts of the shaft..

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February 2008
A 60 meter Motor Yacht with a new "look"..

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February 2008
The difference in wake for different shaftline configurations..

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February 2008
With the use of CFD we have modelled the airflow around the superstructure of an 85m motor yacht..

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October 2007
During these last years we assisted Karel Kuiper with the rennovation of the skutsje "Nynke", a Dutch sailing barge built in 1909 and now used for racing in the IFKS fleet. In the spring of this year the "Nynke" (after a succesful racing season in 2006) was expelled from the IFKS because the original hull form was thought to not constitute a skutsje by the IFKS management - even though the technical committee of the IFKS reported that it was (for which it was subsequently fired by the IFKS management). We have studied all the documents (now in the "scheepvaartmuseum" in Sneek) and found that the "Nynke" is indeed a regular skutsje. Our report (in Dutch) was corroborated by experts from the scheepvaartmuseum in Amsterdam. This report can be found on our website. The management of the IFKS are now asking that all the members of the IFKS either support their decision in expelling the "Nynke" or else..

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October 2007
The construction on the moulds for our 12.2m "Gulliver" design has started at the Nedcam facilities.

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October 2007
The construction of our new 13.5 meter Lemsteraak design is well underway at the new Kuiper Lemsteraken yard in Sneek.

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September 2007
We have reached agreement with IHC Dredgers on the use of our CFD software in the further development of dredger hull forms and their appendages. The first series of CFD runs for a cutter dredger has already been completed with good results. Because of the significance of scale effects IHC Dredgers will from now on be concentrating more on the results of CFD analyses carried out for the full-scale vessel rather than on the results of model tests.

September 2007
We have been asked to give a presentation at the 2007 Numeca User Conference in Brussel, to be held on the 6th and 7th of November, regarding our experience and the use of the Numeca/Marine CFD package, including Hexpress and ISIS-CFD.
The title of the presentation, presented by Niels Moerke, will be "Use of CFD in the Design of Yachts".
September 2007
The 43.5 meter Motor Yacht, to a concept by Cor D. Rover Design, for which we did the naval architecture and structural work, is currectly under construction at the yard.

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May 2007
The DViper is a revolutionary styled motor boat we have been working on in co-operation with the graphic designer Sybren Jelles.

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May 2007
We were recently asked to provide support in determining the flow and loading on a zero-speed fin for Quantum Controls.

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May 2007
Earlier this year we reported on the sailing performance analysis of J-Class Yachts, for Hoek Design Naval Architects. We have currently finished the first stage of this project.

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May 2007
Angel of Joy, the Cyrus 33 for which we did the naval architecture work, has been awarded the World Superyacht Award in the category "Best Semi-displacement or Planing Motor Yacht in the 30, to 39m size range".

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May 2007
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March 2007
In the latest edition of Spiegel der Zeilvaart, an article, written by Peter van Oossanen and Niels Moerke, was published regarding a CFD analysis of a Lemsteraak.

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Download article..
February 2007
Angel of Joy, the Cyrus 33 for which we did the naval architecture work, has been nominated by Boat International for the World Superyacht Award in the category "Best Semi-displacement or Planing Motor Yacht in the 30, to 39m size range".

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February 2007
Present projects includes naval architecture design work for a 73.5 m motor yacht for a speed in excess of 20 knots for a very demanding owner to a concept by Cor de Rover and, for the same client, a 38 m motor yacht capable of speeds in excess of 35 knots, also styled by Cor de Rover. Another 38 m motor yacht is being worked on to a concept by Omega Architects, to be built by Jachtwerf Jongert.
February 2007
We are presently designing a 12.2 m motor launch for a very demanding client, to be built in large numbers. This twin-engined concept has features not seen before and is aimed at day and week-end cruising with up to 8 people in the large cockpit. A large number of engine configurations are to be used to give this boat a host of speeds, ranging from low speeds of about 8 knots to speeds in excess of 20 knots. The hull form was designed with special care so as to be optimum throughout this speed range.

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February 2007
We are presently working on the design of a 10.5 m motor boat, styled as a pre-war motor torpedo boat (MTB) which is to reach speeds in excess of 30 knots.
January 2007
After many years of work we were able, late in 2006, to complete the development of a new Velocity program (VPP) for the calculation of the speed of all sorts of ships and yachts under sail. Part of this work was sponsored by Hoek Design Naval Architect and they now have a version of this VPP to assist them in their own design work. This new VPP has features not included in other VPP=s such as the possibility to calculate the equilibrium rudder angle to check the steering balance, the inclusion of a host of different keel and rudder configurations with or without bulbs, winglets, trim tabs, dagger-boards, lee-boards, etc, and a new mathematical description of the aerodynamic performance of different types of sails and sail combinations.

A lot of the development work in bringing about this new VPP went into the mathematical modelling of the performance of traditional sailing vessels such as can be found in Dutch waters. Often referred to as sailing barges, they feature gaff rigs and lee-boards. The mathematical modelling of the hydrodynamic side force and resistance of these traditional vessels was fine-tuned using the results of tank tests carried out at the Delft University towing tank some years ago, with a systematic series of Lemsteraken. The work for traditional sailing vessels is not yet finished. The present mathematical model is yet to be used to identify improvements in the design of these vessels.

Further development work is scheduled for 2007. Due to the revival of interest in J-Class yachts we will, again together with Hoek Design Naval Architects, be developing a special version for accurately calculating the performance of these (and similar) yachts.


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January 2007
In past years we have regularly been confronted by clients wanting a greater degree of roll-stabilisation when at anchor and underway. This has led to a decision to fit bilge keels on all of our motor yachts. Bilge keels are still one of the most effective measures for significantly increasing the roll damping of yachts and ships. For some motor yachts, particularly when constructed from aluminium or composite materials, the fitting of bilge keels is not enough of a measure because of the high transverse stability (GM) these hulls have. The roll period then reduces and the motion becomes much more unpleasant for owner, guests and crew on board. This problem has become even more serious because of the fact that many larger yachts now anchor offshore (in bays and near beaches) because of lack of space in marinas and harbours.

For different clients we have during these last 2 years carried out a number of model test programs to compare the performance of various roll-damping devices. Apart from bilge keels these are zero-speed fins, gyro stabilisers, and various other concepts now being developed. From this data we have developed a mathematical model for calculating the roll-damping of bilge keels and various types of fins. This mathematical model is to be expanded on in 2007.

Together with Quantum Controls, we will also be looking at ways and means of improving the design of zero-speed fins so as to increase their effectivity and reduce their resistance when they are not of the retractable type. For high-speed motor yachts, the loss of speed due to the addition of zero-speed fins is presently often more than 0.5 knot.

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January 2007
Following a long co-operative project with Hoek Design Naval Architects in the area of VPP development, which ended late in 2006 when we delivered a new VPP particularly suited for predicting the sailing performance of traditional Dutch sailing vessels, we entered into a new agreement with Andre Hoek and his team. This new agreement covers our co-operation in the design of J-Class yachts. We will be supporting Hoek Design with VPP studies and CFD analyses of prospective designs in all of their J-Class projects.

Our first project with them in this area covers the VPP analyses of 12 possible designs. The 5 best performing designs are then to be analysed by CFD.

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January 2007
Following the feasibility study carried out in 2004-2005 on outfitting merchant ships with sails, in which we showed that for many routes fuel savings of between 30 to 40% can be attained, we and our partners UB Sails and MS Insulinde have approached various shipowners about the possibility of a prototype application. Notwithstanding the fact that the Dutch Government has indicated that substantial subsidies would be forthcoming for a project involving the testing of such a prototype, none of the shipowners we have spoken with have decided in joining us in this venture. Our work in this area continues however. The possibility of applying for a patent on the novel soft-sail rig we have developed together with Jan Dijkstra of UB Sails is presently being studied.
December 2006
After using the STAR/Comet RANS code for about 18 months, we decided late in 2006 to acquire a license to the FINE/Marine CFD system, consisting of the Numeca Hexpress automated unstructured grid generation software system and the ISIS RANS solver developed by Ecole Centrale de Nantes (ECN). We have become a leading clients of the FINE/Marine system and the agreement reached with Numeca and ECN calls for a close co-operation between the parties.

Late in 2006 we also invested heavily in hardware to enable us to shorten running time for a typical hull with appendages (with a mesh of 3 million cell nodes or more) to less than 48 hours. We now have a Linux cluster in our network of 20 nodes with a speed of 2.6 Ghz.
November 2006
We organized a 1-day seminar in Wageningen covering all aspects of the Maxsurf CAD-CAM software suite. Gooitzen Eggink from Formation Design Systems Pty. Ltd. in Australia came over and covered many aspects of the Maxsurf software. About 25 users of Maxsurf attended.

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July 2006
In 2006 we completed naval architecture design work for 2 motor yachts of 45 m length for Lenny Yachts in Turkey. This yard is managed by the well-known Vitters Shipyard. We had already designed a 32 m semi-displacement yacht for this yard to a concept designed by Rene van der Velden, which yacht (AAngel of Joy@) has been nominated for a World Superyacht Award. Later versions of this 32 m motor yacht were lengthened to 34 m.

One of these 45 m yachts is of the displacement type and the other, for a design speed in excess of 20 knots, is of the semi-displacement type. Both designs were tank tested At Marin and were qualified as very good by Marin for their speed-power characteristics and seakeeping behaviour. The semi-displacement yacht makes use of a hybrid concept, developed by us, which consists of a round-bilge hull form with special features and an integrated spray rail. In this way the resistance and wash at lower speeds is as good or better than a yacht of the displacement type, while achieving good semi-planing performance at speeds above 20 knots. In addition, special attention was given to the design of the propulsion arrangement, shaft appendages and propellers, to keep vibration and noise levels very low. The yard is to start building the semi-displacement version soon.

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February 2006
At the 2006 Dusseld?rf Boatshow, Jongert Yachts will be displaying the results of an extensive study we recently carried out, regarding the performance of the new Jongert 2400M. In this project we combined the strengths of our in-house VPP and data acquired by doing a thorough CFD analysis of the hull and its appendages.

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February 2006
We recently completed the first phase of our commercial sail research project, aimed at determining the viability of different sail rigs on a merchant ship. The important outcome of the work carried out is that both a square-rigged and a longitudinally-rigged soft-sail arrangement on a 63 m, 1430 ton deadweight cargo vessel are capable of reducing fuel consumption by an average of between 32% and 41%, depending on route and time of year. The developed square-rigged soft-sail arrangement is very novel in that it can be readably automated with respect to sail-setting and -reefing and sail tuning, over the complete range of true wind angles.

The economical analysis carried out shows that the return on investment for the longitudinal arrangement can be realized within 2 years and the square-rigged sail arrangement within 3.5 years, depending on fuel prices. No major impact of adding the rig and sails to the performance of the (existing) vessel was identified, although the increase of rudder size by about 20% is advocated for the particular vessel for which the research was done, for safety reasons.

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February 2006
We have acquired commissions for two independent projects, in which we will be analysing the effectiveness of the most commonly-used zero-speed roll-damping devices. These will be analysed by means of tank tests at MARIN, in Wageningen, the Netherlands and at the Wolfson Unit in Southampton, UK. Various manufacturers have agreed to cooperate on these tests, either in the form of financial support, or by delivering the hardware required to perform the tests.

The devices to be tested include:
  • Traditional bilge keels
  • Gyro-stabilisers
  • Active stabiliser fins
  • Quantum Archer Flaps

In earlier projects we have already been able to pin-point the effect on the performance of the vessel when fitted with various roll-damping devices.
January 2006
Recently we have completed a CFD analysis of the keel and winglets of the 55.5m ketch Ethereal, to be built at Royal Huisman Shipyard, for which we are a member of the design team. The CFD analysis confirmed the results acquired by model tests and showed very good performance of the winglets.

For Ethereal we have also carried out an extensive propulsion analysis, regarding POD propulsors and a conventional shaft line, designed the shaft line, performed the fairing of the winglets and pin-pointed the best propeller design.

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November 2005
In September of 2005 we were commissioned to carry out preliminary design work for a new 50 m round-bilge displacement motor yacht to be built by Heesen Yachts. We were also commissioned to carry out an extensive series of model tests for this vessel. The model test programme, including the associated resistance and powering predictions over a range of displacement and trim values, were reported on by us recently. Various findings of these tests will be incorporated in the detailed design of the vessel, now taking place.

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July 2005
After several design changes this year, such as a new leeboard design, skutsje Elisabeth won the championship for the open class of sk?tsjes (IFKS). Results from the six races are: 4th, 3rd , 2nd , 3rd , 1st , 1st.

Upwind performance due to the new leeboard is extremely good. A standard traditional profile for a leeboard is a flat plate with round trailing and leading edge. We designed a special profile for this leeboard to meet the changing conditions in which the leeboard has to function. To optimize the performance in rough seas special attention was given to the ballast distribution. For light wind conditions a new jib was added to the sail inventory.

High boat speed, good tactics and boat handling resulted in a first rank for the IFKS 2005.

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July 2005

Currently we are making some changes to the boat to try and find further improvements still. The Guardian Mate will be showed to the public at 2005 HISWA-in-water boatshow in IJmuiden, Holland.

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June 2005
On June 20, our client, Mr. Budel finished in the OSTAR (Original Singlehanded Trans-Atlantic Race), being first in his class, the Open 40. The rough weather and seas made his opponents give up one-by-one because of technical failures. Due to good seamanship mr. Budel managed to stay in the race and finish.

Earlier this year we have analyzed the Hayai and were capable to pinpoint a number of improvements to be made and have designed an optimized daggerboard. First sailing results proved a significant increase in upwind performance.

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June 2005
Recently, the first build of the Beluga 46 was launched. The Beluga 46 is a design by Satellite Yacht Design, built by Bood Jachtbouw, for which we have designed a lifting keel, with bulb and winglets, for high sailing performance. First trials were promising and her performance in the first match she participated in, attracted the attention of many.

Currently the owner has taken the Beluga 46 to Spitsbergen for summer holidays.

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April 2005
We have reveceived a commission from a Belgian client, in cooperation with Dutch designer Peter Bosgraaf, to participate in the design of a 60' High Performance Cruising Yacht. Our responsibilities will be the design of two sets of appendages and the structural engineering of the hull and the appendages.

For the keel we will be utilizing a new winglet concept, which has recently been tested at the Wolfson Unit in Southampton. The first results look very promising and we will now be detailing the design and start work on the structural engineering.

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April 2005
We have recently completed an optimization study for Open 40 "Hayai", former "Wind of Change". Our client is going to compete in the OSTAR, startiing this coming May. In this study we have used our newly developed VPP, which has capabilities to analyze the appendage geometry specific to this type of yacht; a canting keel for stability and an asymmetrical daggerboard. We have been able to pinpoint a number of possible improvements, and have designed a new daggerboard which is currently being fitted to the yacht.

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October 2004
Trials were carried out with the first Guardian 50 late in November 2004. Allthough the weight was greater than prescribed, due to the use of non-prescribed materials, the power-speed performance of the yacht and the noise and vibration properties were found to be excellent, thereby validating the performance that was determined from model tests and extensive calculations. Measures are being taken to improve this even more for the follow up. We have received an order from Blue Print Marine to study changes to the design in certain areas for this purpose.

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November 2004
In September and October 2004 we were awarded major government subsidy grants for two projects we will be carrying out together with other companies.

The first of these involves the fitting of 2000 square metres of sail to a 65m merchant vessel, in cooperation with Jan Wind Shipping and United Baltic Sails.

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The second of these projects is aimed at developing the Hull Vane, a device to be added to the aft body of all types of vessels for the reduction of resistance. This project is being carried out together with Wagenborg Shipping and IHC.

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September 2004
We have been awarded a ShipConstructor distributorship for the Netherlands by the makers of this ship design and manufacturing package, Albacore Research Ltd in Canada. The perfect fit of ShipConstructor with Maxsurf (for which we have been exclusive distributor in the Benelux for more than 15 years), was responsible for the discussion that we had with the managament of Albacore Research Ltd, leading to their offer.
September 2004
We recently participated in an enquiry held by the NYYC concerning the authorship of the design of Australia II, winner of the America's Cup in 1983. For years we have been unwilling to disclose the exact nature of the role that certain Dutch individuals played in the design process because of loyalty to the team that won the cup in Newport. Since late 2003 however some members of this team have been making public statements to the fact that the Dutch were not involved in the design of Australia II, in support of pressure to have Ben Lexcen elected to the America's Cup Hall of Fame. This state of affairs has led us to decide in favour of co-operating with the NYYC on this issue.
March 2004
As we reported earlier, we received a commission to carry out work to determine the possibility of designing and building a new Lemsteraak with superior performance compared to the best vessels in the existing fleet.

The basis for this research is the vast amount of test data accumulated in the previous 3 years, when we carried out extensive tests in the wind tunnel and in the towing tank with different models. The subject test results have only recently been fully analyzed. The main results have now been implemented in a VPP.

With this updated VPP we have carried out an extensive series of calculations to determine the optimum hull dimensions, the optimum hull form and the best sail plan for a new design. The results of this significant study will be used in our next commissions to design an all-out racing Lemsteraak.

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February 2004
Peter van Oossanen and Niels Moerke have published an article on the optimization work that was carried out for the skutsje Elisabeth. This was recently published in the February 2004 issue of ?Spiegel der Zeilvaart?.
February 2004
Peter van Oossanen will be presenting a paper on the design of America?s Cup yachts at the Madrid Yacht Design conference to be held in March 2004.
January 2004
Spiegel der Zeilvaart published an interview with Peter van Oossanen recently. The subject article outlines Peter?s achievements and some recent projects Van Oossanen & Associates carried out. His philosophy on sailing yacht design was the main focus of the article.
January 2004
We received orders for the optimization of various traditional Dutch sailing craft. In each case the owners have approached us with the request to assess what can be done to improve the performance. In each case these are yachts that regularly participate in races.
January 2004
Following the order received from Mr. Kees van de Stadt of Satellite Yacht Design, to design a lifting keel for their Beluga 46 we developed a unique design received with favour by the client, the owner and the builder Klaas Bood.

This design features a keel stub in which is housed a lifting keel fin, to the bottom of which is attached a ballast bulb and winglets. Performance calculations reveals the design to possess superior speed, due to the additional stability and the addition of winglets.

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January 2004
We have been requested by Heesen Shipyards to assist in the evaluation of the performance of a very fast motor yacht with a length of 51 m. This project involves model tests (up to speeds of 60 knots) and numerical work to optimize appendages and the propulsion arrangement. Similar projects were recently carried out for a 32 m, and a 44 m yacht being built by Heesen.
January 2004
Hoek Design have ordered an evaluation of the helm balance of the design of a 125 ft schooner. This involves use of our in-house VPP which has the capability to calculate the equilibrium rudder angle.
January 2004
We have received orders for the design of two new motor yachts, to be built in series, in composite material. The styling of these designs will be carried out by Rene van der Velden. Both yachts are to achieve speeds in the semi-planing range.

The 65 ft version will achieve speeds of 25 knots and will have a hard-chine hull form, based on the successful design of the Guardian 50 completed a year ago.

The 72 ft version will have a round-bilge hull form and be capable of speeds in excess of 18 knots.
October 2003
The IJsvogel, a lemsteraak designed by Van Oossanen & Associates, has obtained a 2n place in its class in the last "Bolkoppenrace".

Earlier this year, the IJsvogel performed very consistent in the Dutch Championships, resulting in a 5-th place overall.
September 2003
We have received an order to review the possibility of identifying improvements in the design of Lemsteraak-type sailing barges. For this class of vessel we have carried out systematic model tests, the results of which we will use for this project.

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September 2003
Heesen Shipyards has asked us to carry out a resistance and propulsion study for a 35 knot, 32m sports fisherman. For this vessel we have contracted the Wolfson Unit MTIA to carry out bare-hull resistance tests.
September 2003
We have received an order from the Dutch government to carry out an investigation of the attainable improvements in the design of motor boats (up to about 15 meters in length) from the point of view of reducing installed power and the associated reduction in wave-making, wash and pollution.
September 2003
Skutsje Elisabeth, for which we did an optimization study last year, has performed very well in the dutch IFKS - the skutsje championships.

With one first place, two seconds, and three thirds, it came to an overall 5th ranking in its class (due to an unfortunate dsq), and in the "sprintklassement" (first around the upwind mark), she achieved an overall first place.
June 2003
After a first, a second, and a third place, Yquem finishes 2nd overall, after Fleur de Lys. Especially in light airs she performed very well.

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June 2003
Yquem, the International Eight Metre we have optimized for this years World Cup, has won its first regatta, the Atlantic Cup in La Trinite sur Mer.
June 2003
Peter van Oossanen has written an article for publication in "The Yacht Report" entitled "Reducing Draft of Large Sailing Yachts".
April 2003
We have obtained an order to design a 43 ft sailing yacht, of which two will be built. The design is intended for short-handed cruising and will be built in GRP using epoxy resin. The design brief is very specific and calls for a moderate classic look with an efficient underwater hull form and modern appendages. Further information will be provided later.

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April 2003
Discussions with Hoek Design Naval Architects recently have resulted in the decision by Hoek Design to participate in our new VPP development project. We will be making improvements to our VPP this year to include further refinements to our hydrodynamic algorithms for different types of appendages and sail forces. We will also be improving the calculation of the equilibrium rudder angle (which calculation is based on equating the sum of the moments of all forces in the horizontal plane to zero). Hoek Design have used our VPP since 1990. The present agreement will allow Hoek Design to utilize our new version when it becomes available.

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March 2003
We have been informed by the Royal Institution of Naval Architects (RINA) that the two papers we had proposed for the Modern Yacht Conference to be held on 17-18th September 2003 in Southampton have been accepted. Perry van Oossanen will be presenting a paper entitled "A Concept Exploration Model for Sailing Yachts", while Peter van Oossanen's proposed paper entitled "America's Cup Yachts - Recent Design Develepments" will be included in the bound book of papers.
March 2003
We have recently updated our publications section with an account of our role (and Peter van Oossanen?s role in particular) in the design team of the Le Defi Areva Challenge for the 2003 America?s Cup. We developed a totally new type of appendage for an America's Cup yacht, with performance enhancement properties.
March 2003
The Dutch sailing federation recently invited us to participate in a committee set-up to improve the present rating rule used for the traditional Dutch sailing fleets composed of vessels of different size and type. The main task will be to include the effect of stability and other pertinant factors in the so-called TVF Rule. It is the intention to try out the new rating system during the 2003 racing season.
March 2003
The "foil-assist" concept is gradually gaining ground. We recently secured a project of our own to look into the possibilities of a fixed foil system (without ride control measures) in reducing the resistance of a vessel in developing a major lift force whereby the hull is partly lifted from the water. This project encompasses a series of model tests to validate (or otherwise) the concept we have been studying on and off for the last years.

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March 2003
We have received the order to determine the optimum hull form for a 37.5 m explorer-typeyacht according to a concept developed by Rene van der Velden. The client has set qualitatively very high seakeeping, resistance and powering levels which this design must meet.