Accession Number : ADA139142

Title :   A Helicopter Flight Investigation of Roll-Control Sensitivity, Damping, and Cross-Coupling in a Low-Altitude Lateral Maneuvering Task.

Descriptive Note : Technical memo,

Corporate Author : NATIONAL AERONUATICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER

Personal Author(s) : Corliss,L D ; Carico,G D

PDF Url : ADA139142

Report Date : Dec 1983

Pagination or Media Count : 50

Abstract : 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)

Descriptors :   *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, AVIONICS, DIGITAL SYSTEMS

Subject Categories : Flight Control and Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE