The problem was to determine if the FDL-8 manned re-entry vehicle lateral-directional modes have clearly adequate pilot handling qualities in subsonic flight. If not, a SAS was to be designed. Lateral characteristics for 21 subsonic flight conditions were obtained from linearized aircraft lateral equations. Assumptions were that symmetrical reference flight conditions and small-perturbation theory apply. The characteristics compared with requirements for highest level handling qualities showed a SAS was required. A two-loop SAS was designed using Root-Locus techniques. The yaw damper loops included undesirable Roll-Spiral coupling but the roll damper, second loop suppressed the Roll-Spiral coupling. (Author)


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    Title :

    Analysis of the FDL-8 Lifting Body Lateral-Directional Modes and Preliminary Design of a Stability Augmentation System for Subsonic Flight


    Contributors:
    G. M. Chin (author)

    Publication date :

    1971


    Size :

    149 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English