00601nam 2200157z- 450 9910712450803321(CKB)5470000002493634(EXLCZ)99547000000249363420230509c1947uuuu -u- -engCharts showing relations among primary aerodynamic variables for helicopter-performance estimationNational Advisory Committee for AeronauticsLangley Field, VaBOOK9910712450803321Charts showing relations among primary aerodynamic variables for helicopter-performance estimation3342201UNINA