The energy transition demands new sustainable technologies, with wind energy offering significant potential. Airborne wind energy systems (AWES) can harness strong, high-altitude winds beyond the reach of conventional turbines. However, the technology is not yet mature enough to compete with other renewable energy systems. There is the need for simulation methods that capture the control dynamics and the coupled aerodynamic and structural behaviour of these systems. Additionally, robust control systems must be developed, incorporating fast models for real-time application. Finally, assessing the scalability of AWES is crucial to ensuring its competitiveness in the energy sector. To satisfy these needs and thus to bring AWES closer to reality this research aims to develop a fast, analytical model that captures the behaviour of AWES with high-fidelity accuracy by incorporating detailed aero-servo-elastic effects obtained from precomputed data. The first work package will focus on developing high-fidelity Computational Fluid Dynamics (CFD) models for a complete AWE aircraft, including moving control surfaces, and the coupling with a structural model using beam elements. The second work package will identify AWES-specific behaviour and study how simulations can supplement experimental data to reduce physical testing. Finally, virtual flight tests will be conducted using the developed models to assess system performance, followed by a scaling analysis based on these models.