2001 FUJIFILM 60 ORMA trimaran, ORMA 2002 Champion, designer Nigel Irens-Marc Lombard-Fuji Design team, skipper Loick Peyron
Fastest boat in ORMA 2002 circuit
CFD optimisation of sailplan span
longitudinal sailing trim study and yaw balance with curved foils
2000 CLUB MEDITERANEE
and 110' sister-ship catamarans THE RACE winner and round the world record holder, designer Gilles Ollier Design Team, skipper Grant Dalton
tank test for hull and appendages
dynamic trim study based on REVA computations and tank test results
appendage design (shape, location)
yaw balance study for various sail plans
performance prediction and sail plan range
During this project, CRAIN perfected a tank test procedure, including model building adapted to narrow and fast hulls. CRAIN obtained experimental data about this kind of hull (leeway influence, daggerboard efficiency and trim momentum) to validate drag models used in V2P.
One of the original objectives of this study was to get a safe longitudinal trim at high speed. We have used CFD Reva computation to find out shape parameters that influence longitudinal sailing trim.
1999-2000 BANQUE POPULAIRE 60 ORMA trimaran
ORMA, second in Route du Rhum 2002, designer Marc Lombard, skipper Lalou Roucayrol
Launch of curved foils and trim tab on centreboard on ORMA circuit
CFD optimization of curved foils
CFD computation of hulls
performance prediction and helm balance prediction using various sailplan configurations
This project was CRAIN's first CFD application to the multihulls problem. CFD using REVA has been used to optimise hull shape with a particular focus on longitudinal sailing trim.
With regards to appendages, CRAIN has underlined the effect of free surface on foil efficiency. This discovery lead Marc Lombard to design the first curved foils for an ORMA multihull. For the second boat, CRIAIN has optimised the curved foil concept in order to decrease wave resistance. The helm balance study allowed V2P validation for such a complex configuration.
2000 SIXIEME SENS IACC monohull, designer Yaka Design Team, skipper Bertrand Pacé, Louis Vuitton Cup 2000 semi finalist
Designed with a small budget by Yaka Design Team (co-ordinated by Philippe Pallu de la Barrière, manager of CRAIN) this narrow hull with an uncommon shape showed surprising downwind speed and great performance improvement throughout the competition.
The design has been mainly based on REVA CFD and on performance prediction carried out at CRAIN.
Article [French - PDF 181 ko]
1998 SILL 60 IMOCA monohull, Third Vendée Globe Challenge 2000, IMOCA 2001 & 2002 champion, designer Marc Lombard, skipper Roland Jourdain.
The hull and appendages comes from a conception method that use Reva CFD (Similar to Whirlpool). With particuliar focus on wave resistance reduction when heeling, canting keel and asymmetric daggerboards optimisation. V2P allowed CRAIN to evaluate the interest of wing masts compared to standard masts and to optimize hull width on the Vendée Globe course.
Article [French - PDF 121 ko]
1997 KHAMSIN 40' catamaran, designer Jo Richards, owner Alain Golaz, Bol dOr 1996 winner
For this overpowered catamaran, optimized for Lac Léman light winds, we have designed appendages in order to go up on one hull from 4 knots of wind speed. V2P has allowed us to provide to the crew, for each sailing condition, sail to use, daggerboard trim, crew location on wings and watter ballast level.
1995 MARICHA 3 : 130 monohull
North Atlantic record (in its class), designer P. Briand
towing tank test for hull and appendages
REVA CFD for hull and appendages
helm balance based on tank test results and wind tunnel result
performance and sail plan prediction
One of the main concern of the designer was helm balance with a ketch configuration and various sailplans. V2P has allowed to combine tank test and wind tunnel results to get a good balance in any condition