The study conducted at the Faculty of Aerospace Engineering in Delft focuses on the impact of internal layout variations on the performance of hydrogen combustion blended wing body (BWB) aircraft. With a growing concern over the environmental impact of long-haul flights, particularly in terms of carbon emissions, researchers are exploring innovative solutions such as hydrogen-powered aircraft. The research introduces a conceptual design tool that allows for the evaluation of different cabin designs and hydrogen tank placements to optimize the fuel efficiency of BWB concepts. By analyzing various configurations, the study identifies specific combinations that lead to reduced fuel burn. For instance, in a 350-passenger BWB concept, a narrow cabin design with 45% of the fuel located near the cabin demonstrates the lowest fuel consumption. Furthermore, the study highlights that even with significant variations in internal layouts, the difference in fuel burn efficiency remains within 20%. This suggests that specific design elements play a crucial role in enhancing the overall performance of hydrogen BWB aircraft. The findings emphasize the importance of considering cabin layout and fuel tank placement in the design phase of hydrogen-powered aircraft. By optimizing these factors, the aviation industry can move towards more sustainable practices and contribute to the reduction of carbon emissions associated with long-haul flights. The research, overseen by Dr. F. Oliviero, underscores the potential of hydrogen combustion BWB aircraft to revolutionize air travel by improving fuel efficiency and mitigating environmental impact.