Wind tunnel tests were conducted on a grid finned projectile configuration in the Mach number range of 0.6 to 3.0. The four fins consisted of nine cells in a vertical orientation. They were at the back of an ogive-cylinder body with a length to diameter ratio of 10.0. Flow visualization as well as force and moment measurements were conducted. The axial and normal forces and the static and roll moments were obtained for 10 different combinations of panel deflections.
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Berner et al. (2001) studied this question.