 superson flow slender bodi discontinu profil slope superson flow slender bodi discontinu profil slope ward's slender-bodi theori extend deriv approxim extern forc slender bodi gener cross discontinu profil slope class bodi consid bodi profil typifi local radiu continu nose base bodi profil discontinu bodi annular side air intak wing-bodi wing unswept lead edg air intak concern assum sharp-edg spillag intern flow conclus appli class bodi variat drag mach number depend discontinu longitudin rate chang cross-section area independ cross-section shape drag unchang direct flow revers express lift moment assum form smooth point bodi lift depend condit base bodi gener theori appli wing bodi revolut unswept wing lead edg bear mark resembl ward wing applic modif subson well superson speed 