By Andy Claughton, Project Leader, Land Rover BAR, November 2015

The modern era of high performance sailing has ushered in a new design paradigm for modern race boats. Compared to past hull shapes, the current in-favor design is both wide and light, it is in this description that the Wide-Light project's name originates.

This project provides insight into the accuracy of existing modeling methods in predicting performance of Wide-Light designs. It is intended for this information to better inform and equip handicapping systems and box rules to address Wide-Light designs.

Five different CFD stakeholders carried out blind CFD analysis on an identical test matrix using different computational codes and approaches. The same test matrix was run as a tank test for both canoe body only and appended configurations as a control for the hull geometry. The CFD results were compared with the tank test control results to determine CFD model accuracy. This project illustrated the accuracy of commercial CFD codes in predicting the forces on a Wide-Light sailing yacht. Additionally, this project provides a comprehensive set of data against which researchers may develop and validate their own numerical tools.


Software Contributor Affiliation Type
FINE™/Marine Benoit Mallol, Jason Ker Numeca, Ker Yacht Design RANS
FlowLogic David Egan Panel Code
OpenFOAM Sandy Wright Wolfson Unit MTIA, University of Southampton Open Source RANS
SHIPFLOW Lars Larsson, Michal Orych Chalmers University of Technology, FLOWTECH Int. AB Combination Panel Code & RANS
Star-CCM+ Rodrigo Azcueta, Matteo Lledri Cape Horn Engineering RANS


Tank Contributor Affiliation
QinetiQ #2, Haslar Technology Park, Gosport England
 Martyn Prince,
Etienne Gauvain
Wolfson Unit MTIA, University of Southampton


Wolfson Unit Model M1108 Metric Imperial
Overall length 4.88 m 16.0 ft
Design waterline length 4.60 m 15.1 ft
Displacement (appended) 215 kg 474 lbs
Displacement (canoe body) 197 kg 434 lbs
Maximum beam 1.28 m 4.2 ft
Draft to datum 1.15 m 3.8 ft

Tank & CFD Conditions:  
Freshwater at 15° C

Wide Light Model Hull, twin & single rudders shown
Wide Light Model Hull, twin & single rudders shown


Wide-Light Final Report:

Seahorse Article (February 2016 Issue):

Paper from 22nd CSYS:


If you use any of the data provided on this page, please use the following information for your citation.

Author: Claughton, A.R.

Title: SYRF Wide-Light Project

Date: 2015

Publisher: Sailing Yacht Research Foundation

Electronic Retrieval Location: http://sailyachtresearch.org/projects/wide-light-project

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