In a previous study, aerial capture of a low-speed falling object by a fixed-wing UAV was investigated and approach trajectory generation using the updated final state control (USFC) was proposed. However, it was essential to derive aerodynamic parameters for a new experimental aircraft, a biplane. Therefore, these parameters are identified using wind tunnel tests and CFD analysis on our own experimental system. In addition, efforts are made to further improve the sensing capabilities using Pixhawk, and the effectiveness of the designed flight system is confirmed. In addition, the steady-state flight required to implement UFSC is confirmed through flight experiments in which PD control is implemented.