The German Aerospace Center (DLR) has initiated testing and development of innovative propulsion systems based on hydrogen fuel cells at the BALIS test field in Empfingen. These systems, with an output in the megawatt range, are envisioned for future use in various modes of transport. Funded by €26 million from the Federal Ministry for Digital and Transport, the project aims to support research and development of emission-free propulsion systems, ultimately contributing to sustainable mobility by 2045. The DLR's BALIS test field enables comprehensive examination of fuel cell systems, electric engines, and control technology, making it a unique facility globally. In addition, the project emphasizes the handling of liquid hydrogen for large-scale propulsion system operation, with a focus on infrastructure development to maintain constant pressure and temperature. The DLR's efforts also include the construction of an electric propulsion system in the megawatt power class, making them pioneers in this field. Collaborating with industry partners, the project anticipates full capacity utilization for the next three years, showcasing a strong commitment to advancing hydrogen technology and sustainable transportation.