Abstract
We have planedan experimental project, that a small airplane is flied and controlled freely in a low-speed wind tunnel, and its flight data are used for estimating the aerodynamic characteristic. As the first step, in order to understand a phenomenon of free flight, we give experiments by manual and remote control. These experiments showed that the initial trimmed flight condition must be established almost perfectly, and it is a difficult and important problem that the movement of the freely flying airplane is restricted in the narrow flight space.
