Why Hullspeed?
As well as the regression method for resistance prediction, Hullspeed also has a theoretical based, slender-body method. This can be applied to multihulls and other vessels that fall outside the parameter range of the regression methods (provided that the individual hulls are symmetrical and reasonably slender). Using the slender-body method, Hullspeed is also able to predict the far-field wave pattern which can be useful for assessing the wake generated by the vessel. Version 12 of Hydromax is compatible with visual basic for applications (VBA) — this means that you can use a VBA macro in Microsoft Excel (or similar) to modify a model in Maxsurf, then test the vessel in Hullspeed automatically and very quickly compare the resistance curves of a parametric series of hullforms.
