The EOPA aircraft is a tandem tilt-wing design capable of vertical take-off and landing. Essential to its operation is the ability to transition from powered-lift to fixed-wing flight, and vice-versa. Control of the transition maneuver is achieved by designing a nominal transition trajectory and using a gain-scheduled LQR to realize closed-loop control. Controller robustness to wind gusts is investigated. Methods used for the dynamic and aerodynamic modelling are described. Simulation results demonstrate the feasibility of closed-loop control of the transition maneuvers but also reveal a susceptibility to wind gusts encountered during transition.