A O.1-scale dynamically similar model of the XC-142A V/STOL aircraft was tested in three degrees of lateral/directional freedom: roll, yaw, and sideslip. The test conditions simulated a full-scale aircraft with wing loading of 70 pounds per square foot (gross weight = 37,400 pounds), flying at approximately 40 knots at a wing incidence of 40 degress and flap deflection of 60 degrees. The simulated descent conditions encompassed level flight and four sink rates up to approximately 1,000 feet per minute equivalent full-scale sink rate. Time histories of the lateral/directional transient response of the model in one, two, and three degrees of freedom were measured. Pursuant to these experiments, the aerodynamic forces and moments acting on the model were measured as functions of the flight variables and model control displacements. The results of these tests defined the descent trim conditions and determined the model control effectiveness and control mixing requirements for this mid-transition flight condition. (Author)


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    Title :

    An Investigation of the Lateral/Directional Dynamic Stability Characteristics of a Tilt-Wing V/STOL Transport Model in Simulated Low-Speed Descending Flight


    Contributors:

    Publication date :

    1969


    Size :

    79 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English