Accuracy Criteria for Evaluating Supersonic Aerodynamic Coefficient Predictions,
MCDONNELL DOUGLAS ASTRONAUTICS CO- ST LOUIS MO
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Aerodynamic prediction methods are traditionally compared with wind tunnel test data. However, the assessment of accuracy is left to an arbitrary interpretation. An accuracy criteria has been developed that defines the required prediction accuracy in terms of allowable errors in missile performance and design parameters. Equations have been selected that relate these parameters to the aerodynamic drag, stability and control coefficients. These equations are differentiated with respect to the aerodynamic coefficients and simplified when possible. Allowable errors in the performance or design parameters are estimated, based on preliminary design requirements, and the required aerodynamic coefficient accuracy calculated. The results allow a quantitative evaluation of prediction accuracy.
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