A numerical technique for analysis of wave drag at lifting conditions

analyzing the total wave drag of an airplane at lifting conditions. An indication of the accuracy of the method at lifting conditions is shown by comparing measured pressure signa­tures at various azimuth angles about an airplane model with those predicted by theory. Calculations are made to illustrate some effects of configura­tion variables on the total wave drag of an airplane at lifting conditions. INTRODUCTION The recent development of numerical techniques for estimating and optimizing the lift-drag characteristics of supersonic cruise vehicles has led to significant improvements in aerodynamic performance at supersonic speeds (ref. 1). Most of these techniques have resulted from applications of existing theories to the high-speed electronic digital computer. As a result, analytical approaches which once were considered too complex for practical application can now be used to conduct aerodynamic trade studies in time to affect the preliminary design of airplanes. Two approaches to the analytical drag buildup of