A production-ready external aerodynamics simulation of the DLR-F6 Wing-Body configuration, one of the most widely used benchmark cases in computational fluid dynamics. This project covers the complete CFD workflow from geometry preparation to post-processing and experimental data validation. The simulation is set up to capture laminar-to-turbulent flow transition across the aircraft surface. Special attention is given to the correct y⁺ selection and boundary layer setup ensuring the first mesh cell sits inside the viscous sublayer with y⁺ ≤ 1 across all aircraft surfaces, which is the fundamental requirement for accurate transition and skin friction prediction. Every solver setting and modelling decision is explained in detail so you understand not just what to select, but why, giving you the engineering judgment to apply the same approach to your own projects.