Problems concerning the validation of moment-method models of small aircraft in the HF band

Considers an example of a moment-method modelling procedure which has been applied previously to other generic aircraft and antenna types. The overall aim of these studies is to provide a `recipe´ for the prediction of airborne HF antenna system characteristics; the application of which will produce estimates of near as well as far-field dependent parameters which are credible and sufficiently accurate for engineering purposes. The procedure simulates the airframe as an electrically very fine wire-mesh (of mesh side length of the order of 1500 wavelength at 2 MHz) and uses NEC as the solution code. An important aspect of the studies described is that no empirically derived information of any kind is incorporated into the mathematical models constructed. Thus, true predictions are produced