A helicopter in-flight simulation was conducted to determine the effects of variations in roll damping, roll sensitivity, and pitch- and roll-rate cross-coupling on helicopter flying qualities in a low-altitude maneuver. The experiment utilized the Ames UH-1H helicopter in-flight simulator, which is equipped with the V/STOLAND avionics system. The response envelope of this vehicle allowed simulation of configurations with low-to-moderate damping and sensitivity. A visual, low-level slalom course was set up, consisting of constant-speed and constant-altitude S-turns around the 1000-ft markers of an 8000-ft runway. Results are shown in terms of Cooper-Harper pilot ratings, pilot commentary, and statistical and frequency analyses of the lateral characteristics. These results show good consistency with previous ground-simulator results and are compared with existing flying-qualities criteria, such as those set forth in MIL-F-83300 and MIL-H-8501A. (Author)
A Helicopter Flight Investigation of Roll-Control Sensitivity, Damping, and Cross-Coupling in a Low-Altitude Lateral Maneuvering Task
1983
50 pages
Report
No indication
English
Aeronautics , Avionics , Aircraft , Turning flight , Flight control systems , Flight maneuvers , Helicopters , Low altitude , Flight paths , Damping , Couplings , Aerodynamic stability , Pitch(Motion) , Yaw , Roll , Terrain following , Sensitivity , Handling , Flight testing , Flight simulators , Inflight , Acceptability , Pilots , Digital systems , V/STOLAND avionics , H-1 aircraft , Cross coupling , Digital control , Roll control , Nap of the earth flight , UH-1H aircraft
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