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The concept and rationale involved in developing a Limited Authority Response v p e (LART) to improve handling qualities of a helicopter for operations in degraded viFual envimoments (DVE) is explained. A LART may be achieved by reprogramming existing, limited authority stability augmentation system actuators to produce a moderate bandwidth, low authority attitude response. A summary of the results from a piloted handling qualities experiment, conducted on the NRC Bell 205 Airborne Simulator, a d d m i n g this concept are presented. This experiment examined the handling qualities of a "UH-60like" helicopter with various LART systems while conductmg operations in degraded night vision goggle conditions. The m$ults indicate an improvement in handling qualities for systems with attitude authority as low as 25 d e g w and a general dislike of systems using parallel servos to increase the overall attitude authority. Pmvision of a pilot selectable height hold system during flight in DVE provided the greatest handling qualities improvement. Some inconsistancy in pilot ratings and comments suggest more detailed research is required to confirm the mults prior to practical applications of the concept.

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