NEC-LIST: Symmetry in Aircraft Model

        Concerning your comment about the use of symmetry for an
aircraft model. Symmetry can be used to some extent by first storing
the symmetrical portion of the aircraft in a green's function and then
reading the green function and adding the tail. This procedure is
described in Example 10 of the NEC2 manual on page 153 and Example 12
of the NEC4 Manual on page 177.

        Admittedly with only two-fold symmetry there may not be a time
savings (it depends on the ration of symmetrical segments to
non-symmetrical). There is significant savings for greater symmetry
or multiple runs of the same frequency.

Keith A. Lysiak, Ph.D 6220 Culebra Road
Southwest Research Institute P.O.Drawer 28510
Senior Research Engineer San Antonio, TX 78228-0510
Radiolocation Systems Section Voice: (210) 522-5776
Signal Exploitation and Geolocation Division FAX: (210) 522-2709
Received on Fri Jul 31 1998 - 06:29:33 EDT