Modern military aircraft often maneuver at relatively high angles of attack, and therefore encounter flight conditions where the flow becomes highly asymmetric. Under such circumstances, the aerodynamic cross-coupling between the longitudinal and the lateral degrees of freedom may become important. In order to ascertain whether the inclusion in the equations of motion of certain cross-coupling terms may be important for correct prediction of the motion of an aircraft, a study was made in which the sensitivity of the predicted motion time histories to these various terms could be examined. A hybrid computer was utilized for the six-degree-of-freedom flight simulations required to evaluate the effects of aerodynamic cross-coupling derivatives. Noticeable effects of aerodynamic cross-coupling were recorded in flight simulations of a fighter aircraft at high angle of attack when perturbed from straight and level flight. Further studies are currently being made. 5 figures. (ERA citation 03:041812)


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    Title :

    Hybrid Computer Study of the Sensitivity of Aircraft Dynamics to Aerodynamic Cross-Coupling


    Contributors:

    Publication date :

    1978


    Size :

    16 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English






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