After making sure that the vessel can be analysed with the slender body method,

Ø  Select the Slender Body Method in the Methods dialog from the Display Menu

Ø  Specify the form factor, see below for explanation

This method is slower than the regression (non-analytical) methods in Hullspeed, and so is not automatically calculated. To calculate the resistance,

Ø  Select Analysis | Solve resistance analysis or use the solve toolbar button .

This will calculate a mesh on the Maxsurf surface and calculate the resistance.

Form Factor

The form factor to be used for the slender body analysis can be specified in the Methods dialog. If a form factor of less than zero (negative) is entered, the Holtrop and Mennen formulation for form factor will be used.

Note:

This method uses the Maxsurf hull surfaces directly, so a full model is required and changing the measurement parameters, other than wetted surface area, will not affect the results. Wetted surface area is used only to compute the friction resistance and the resistance coefficients displayed in the Graph window.