Potential NASA Commercial Applications: The Reduced Order Aeroservoelastic Models with Rigid Body Modes technology will increase the technical readiness of methods that can be used by NASA to support Aeronautics Research. The proposed work addresses development of efficient methods to generate mathematical models of flight vehicles currently employed in NASA research projects such as the X-53 and X-56A for performing vibration, aeroelastic, and aeroservoelastic studies. This includes design methodologies that encompass CFD steady and unsteady aerodynamics, flexible structures, and active control systems. The work will use existing methods that predict aeroelastic phenomena and complex steady and unsteady aerodynamic flow phenomena, especially in the transonic speed range. The tools, methods, and algorithms developed in the Phase I effort can be marketed to both NASA and non-NASA customers as they are applicable to vehicles such as the X-53, F/A-18C, and X-56A.