AN INVESTIGATION OF MECHANICAL STABILITY AND TRIM AUGMENTATION ON HELICOPTER IFR CAPABILITY
CESSNA AIRCRAFT CO WICHITA KS
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Directional flight characteristics of the H-41 helicopter were improved with tail rotor blade design changes and with the addition of two mechanical gyro systems. Evaluation of these systems was accomplished by measurement of the air craft characteristics and by pilot evaluation during simulated instrument flight. The mechanical stabilization systems were found to be effective and to offer a low level of required maintenance. The IFR capability was extended to 25 kt on a basis comparable with 40 kt as determined on a previous program. Simulated IFR approaches, transition to hovering, and landings were conducted.