An assessment of aeroprediction accuracy needed to adequately support the definition of missile systems for aerodynamic flight is carried out based upon the idea that aerodynamic requirements must be augmented to account for aeroprediction uncertainties. The flowdown of system performance requirements to aerodynamic requirements is illustrated, and examples of how uncertainty-augmented aerodynamic requirements impact subsystem weights are provided. It is argued that requirements-responsive design demands assurance that the system requirements will always be satisfied in the presence of parameter uncertainties, leading to a likelihood that the system will be oversized and deliver performance in excess of what is minimally required. Relationships between aeroprediction uncertainties and probable excess subsystem mass are developed. The propulsion subsystem mass is shown to be the most effected, especially for missiles that employ airbreathing propulsion. The most important source of aerodynamic uncertainty is shown to be that of drag coefficient at the desired lift coefficient magnitude, or effectively, the operational lift/drag ratio.


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    Title :

    Appropriate Aeroprediction Accuracy in Defining Missile Systems for Aerodynamic Flight


    Contributors:
    M. M. Briggs (author) / M. Tahk (author)

    Publication date :

    1989


    Size :

    41 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English