The data to be entered is the measurement data of an IMS certificate. The following data is required:

§   Hull Data

§   Rig Data

§   Mizzen Data

§   Wind Data

The data is entered by selecting the appropriate dialog from the Data menu:

Note:

If you are entering data from an existing IMS certificate, you will notice that not all the measurements listed on the IMS certificate are required, SPAN only needs the essential data.

In the following sections we will show you how to enter the hull data manually. However in most cases, it is much simpler to have the data measured from a Maxsurf design, this is described in the Measuring a Maxsurf Design section below. See Hull Measurement Definitions on page 28 for explanation of terms.

See

Rig Measurement Definitions on page 30 for explanation of terms

Figure 1, Rig data parameters on page 30

NOTE:

Y character denotes a mizzen measurement.

Also see

Rig Measurement Definitions on page 30 for explanation of terms

Figure 1, Rig data parameters on page 30

The Wind Data dialog is used to define the wind conditions for which you wish to calculate the performance data. The default values of the dialog are set to those of the IMS VPP.

A maximum of 7 wind velocities may be defined.  Two sets of true wind angles may be defined.  The first is the wind angles for which the upwind sail set will be used, and the second the wind angles for which the downwind sail set will be used.  Wind angles must have a minimum spacing of 3 degrees.  Upwind sailing angles may be defined from 35 degrees to 110 degrees and downwind sailing angles may be defined in the range of 80 degrees to 180 degrees.

If a Maxsurf model has been loaded, then a sketch of the rig will also be displayed once the rig parameters have been entered.

SPAN produces a graphical representation of the rig data as specified in the Rig and Mizzen dialogs. This provides useful visual feedback of the rig parameters specified.

You can display the rig sketch using the -button on the display toolbar.

Profile view

The colour of the rig sketch can be set in the colour dialog from the view menu, by editing the label colour. The centre of the lateral projected area of each sail (except the spinnaker) is displayed with an  icon.

Perspective view

The rendering toolbar can be used to switch rendering on/off and adjust light-settings. See the Maxsurf manual for more information.