This study presents a unified aeroelastic modeling framework that augments classical lifting-line theory (LLT) with a Goman–Khrabrov (GK) dynamic stall model to capture unsteady aerodynamic and structural interactions under gust and maneuvering conditions. The model formulates the coupled aeroelastic system in state-space form, integrating structural degrees of freedom (plunge and pitch), aerodynamic lag states from Wagner and Küssner approximations, and internal separation dynamics through the