9.1 General Considerations
You may have noticed that the top skirt shown in Figure 7-5 and included in Listing 7-2 used an exaggerated spacing between the skirt and the tower. This was necessary because a thick-wire tower model was used and to comply with the requirement that the spacing be at least several radii, it was necessary to exaggerate the spacing. However, to overcome such inconvenience and to make the tower model more realistic, the usual practice when modeling top hats, skirts, and so on is to use the lattice tower model, where the wires are all rather thin and thus can accommodate a closer spacing of conductors.
Another consideration ...
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