Fig. 13. Lift coefficients (C_L; A), drag coefficients (C_D; B), lift to drag ratios (L/D; C), and pitching moment coefficients about the center of mass (C_M; D) for the smooth trunkfish model positioned at various pitching angles of attack. In the lift coefficient plot (A), smooth trunkfish coefficients are depicted as open circles, while delta wing coefficients are depicted as filled circles. The delta wing has a similar aspect ratio (0.83) to that of the smooth trunkfish. Delta wing data are from Schlichting and Truckenbrodt (1969). Positive pitching moment coefficients (D) indicate a nose-down pitching moment about the center of mass, whereas negative pitching coefficients indicate a nose-up pitching moment about the center of mass.

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