cranfield0077

compar analysi perform long rang hyperveloc vehicl long rang hyperveloc vehicl studi term motion power flight motion aerodynam heat unpow flight power flight analyz ideal propuls system rather close approach present day rocket motor unpow flight character return earth along ballist skip glide trajectori trajectori treat yield maximum rang given veloc end power flight aerodynam heat treat manner similar employ previous senior author studi ballist missil naca except radiant well convect heat transfer consid connect glide skip vehicl ballist vehicl found least effici sever type studi sens gener requir highest veloc end power flight order attain given rang disadvantag may offset howev reduc convect heat transfer entri bodi artific increas pressur drag relat friction drag use blunt bodi thu kinet energi requir vehicl end power flight may reduc minim mass coolant materi involv glide vehicl develop lift drag ratio neighborhood greater far superior ballist vehicl abil convert veloc rang disadvantag far heat convect howev compens advantag heat main radiat back atmospher consequ mass coolant materi may kept rel low skip vehicl develop lift drag ratio found superior compar ballist glide vehicl convert veloc rang lift drag ratio found equal compar ballist vehicl lift drag ratio