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The aerodynamic characteristics of two grid fin configurations have been investigated experimentally. The fins were mounted on a body of revolution consisting of a 3.0 caliber ogive nose with a 7.4 caliber cylindrical afterbody. A main balance and four fin balances were used to m e a s u r e overall model loads and individual fin loads, respectively. Runs were made with fins deflected a t both 0 and 15 degrees. Individual fin normal force, hinge moment and root bending moment coefficients were measured a t Mach numbers ranging from 0.5 to 3.5. Results indicate that grid fin hinge moments are extremely small, normal force and root bending moments are comparable t o planar fins of similar size, and grid fin axial force is greater (for the grid fins tested) than planar fins with comparable lift characteristics.