An aircraft's control effectiveness can be evaluated in flight tests by applying an exactly known moment to the aircraft. In the NAL Short Take Off and Landing (STOL) aircraft (ASKA), a method was adopted during flight tests to measure control effectiveness of a variable incidence T-tailplane with elevators, ailerons, and spoilers. Known pitching moments were applied by using crew members loaded with ballasts to move from either a forward to rear position or vice versa, whereas known rolling moments were produced by asymmetric fuel loading. Longitudinal spoiler characteristics as a result of spoiler deflections, were investigated by performing alpha sweep tests with a spoiler up-rig. This easy flight test method was used in ASKA's flight tests to evaluate control effectiveness. The flight measured control effectiveness is subsequently compared with wind tunnel test results.


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    Title :

    Note on Flight Measured Control Effectiveness of the Quiet STOL Experimental Aircraft ASKA


    Contributors:
    T. Bandou (author)

    Publication date :

    1991


    Size :

    32 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English