Stability Derivative Computation of Tailless Aircraft using Variable-Fidelity Aerodynamic Analysis and Wind-Tunnel Experiments

In aircraft design, tailless aircraft are an attractive concept for their aerodynamic efficiency. However, because of their unusual shape, a tailless configuration has disadvantages in stability and control (SC static derivatives, steady dynamic derivatives, and unsteady dynamic derivatives. For accurate and efficient stability estimation, several aerodynamic and numerical methods were introduced to calculate aerodynamic derivatives. These values were compared with the wind tunnel data for the validation. Finally, the stability characteristics of certain steady conditions were calculated from the results of the numerical method, and the stability performance was evaluated.