Magnus and spin-damping measurements of a spinning projectile using design of experiments

The purpose of this research is to efficiently characterize the dynamic Magnus effect and spin-damping data of a spinning projectile or missile over the required experimental region using statistically designed experiments for wind-tunnel tests. In the present work, the wind-tunnel tests for the Magnus effect and spin-damping measurements were conducted on a 155-mm spin-stabilized projectile model. The tests used techniques involving the design of the experiments and response surface modeling. The Magnus effect and spin-damping data were investigated for various Mach numbers and angle-of-attack combinations. The validity of the wind-tunnel measurement techniques was evaluated by comparing them with the previous test results on the same configuration. The experimental results show that regression models were found to successfully estimate the Magnus effect and spin-damping needed to investigate aerodynamic characteristics of a spinning projectile over the required experimental design space.