Prediction of Nonlinear Rolling and Magnus Coefficients of Cruciform Finned Missiles

†A new method combining strip and slender body theories has been developed to predict the aerodynamic roll and wing-induced Magnus coefficients of cruciform tailed missiles at high angles of attack. The method, based on the wing alone lifting capability, is applicable over the Mach number range and for large angles of attack at arbitrary bank angles, providing analytical expressions of the nonlinear rolling moments: roll damping, roll driving, induced roll moments and additional coupling terms. The analytical expressions fit the form of the Maple-Synge expansion and the degree of nonlinearity shown by experimental results.

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