Free Flight Test in Hypersonic Impulse Wind Tunnel

Free flight test can obtain aerodynamic parameters using the model's motion trajectory, which was recorded by high speed camera. It has unique advantages in the study of aircraft dynamic/static stability for its characters of no support system because of its true simulation of the flight condition. A free flight test was carried out in the JF-8A hypersonic wind tunnel with a 10°cone model, simultaneously, a ball model was used to measure the dynamic pressure. In this paper, the key method of extracting motion parameters and aerodynamic characters were also introduced in detail.