The overall ground experiments on the flying test bed which has been developed for the purpose of studying the problems associated with hovering, vertical take-off and landing of VTOL aircraft are described. The experiments were made on the complete assembly but without engines and fuel, and consisted of three items; (1) the functional performance of several subsystems, (2) the capability of the attitude control, and (3) the vibration characteristics of the framework. The subsystems tested were the air turbine system connected with the electrical and hydraulic systems, the bleed air distribution system, the attitude control system, the airborne instrumentation system, and the redundant back-up system. The attitude control experiments made with varying amounts of artificial damping and stabilization showed that their optimum ranges in pitch and roll were revealed independently. In the vibration tests, the measurements covered natural frequencies, modes, damping ratios and phases of vibration of the framework. (Author)


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    Title :

    Overall Ground Experiments on Flying Test Bed for VTOL Aircraft at National Aerospace Laboratory


    Contributors:
    N. Takizawa (author) / Y. Tanabe (author) / A. Shibuya (author) / T. Ogawa (author) / H. Fujieda (author)

    Publication date :

    1972


    Size :

    93 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English







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