"Helicopter rotors." . . "Aerodynamics." . . "Aerodynamic characteristics." . . "Vortices." . . "Rotor blades(rotary wings)" . . "Pressure distribution." . . "Aerodynamic loading." . . "Helicopters." . . "Low altitude." . . "Angle of attack." . . . . "Hovering." . . . . . . "Analysis of low-speed helicopter flight test data" . "Analysis of low-speed helicopter flight test data"@en . . . . . . . . . . . . . . "Analysis of Low-Speed Helicopter Flight Test Data"@en . . . . . . . . . "The purpose of this study was to investigate the aerodynamic behavior of a helicopter rotor operating in the low-speed flight regime, particularly in the nap-of-the-earth (NOE) evasive mode. The effort consisted of reducing and analyzing existing AH-1G flight test response data acquired for simulated NOE flight under Contract DAAJ02-73-C-0105. Specific areas of interest analyzed in this study include blade/vortex interaction at 50 knots and angle-of-attack data derived from hot-wire measurements taken in hover."@en . . . "BELL HELICOPTER TEXTRON FORT WORTH TX." . . "Low velocity." . . "Flight maneuvers." . . "Flight testing." . .