Model development

We are more than happy to help you build a model of your yacht. This could be a yacht that is already sailing, and you want to learn how to get the most performance out of it, or a yacht that’s currently in design.

To get started building a model, the more information you can provide the better.

To get started building the model, we will need:


  • A general layout drawing of the yacht
  • 3D geometry if available for graphics display purposes (not essential)


  • A hull shape surface, e.g. as an IGES file. If this is not available:
    • For a foiling yacht where the hull hydrodynamics is not crucial, we could reconstruct a hull surface from 2D drawings and photos
    • Where an accurate hull shape is important, you may be able to get a 3D scan carried out
  • Any existing hydrodynamic data,  if available, e.g. RANS CFD data (not essential)


  • Shapes and cross-sections if not shown on the general layout
  • Bearing positions, axes of movement
  • Maximum extents of translation and rotation
  • Relation between rotations (e.g. connection of port/stbd rudders)
  • Information about any existing autopilots, e.g. foil ride height controllers
  • Foil structural information if available (e.g. EI, GK along span)

Rig & Sails

  • Mast geometry
  • Rigging configuration and diameters, for windage computation
  • Sail configurations – or at least a typical configuration to start
  • Any existing aerodynamic data if available, e.g. from North Flow, or RANS CFD results (not essential)

Mass Data

  • Total mass and centre of mass
  • Separate masses of any significant movable components (e.g. canting keel)
  • Position and ranges of adjustable ballast, e.g. water ballast
  • Crew weight and range of positions

It’s unusual to have all this information available, and we can discuss options for working around any missing pieces of the puzzle.