Boundary-layer measurements on a rocket-powered free-flight model to determine average skin-friction coefficients have been made on an ogive-cylinder body of fineness ratio 15.9. Average skin-friction coefficients were obtained for the body area ahead of the fins over a range of Mach number from 1.3 to 2.5 and over a range of Reynolds num¬ber from 90.3 x lO6 to 162.9 X 106 (based on axial body length to the measurement station). Comparison of the experimental data with a flat-plate skin-friction theory by Van Driest showed good agreement.
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