Diamond Aircraft, based in Wiener Neustadt, Austria, has launched the 'H2EDT' project, focusing on researching and testing a hybrid hydrogen-electric system for aviation. Funded by the Austrian Research Promotion Agency (FFG), the project involves collaborating with various research institutions to explore the use of gaseous hydrogen as a fuel source for hybrid powertrains in general aviation. The research team aims to address the challenges of relying solely on hydrogen by developing a hybrid architecture that combines the power density of batteries with the energy density of hydrogen fuel cells. The project involves creating a hybrid testbed with components like a hydrogen fuel cell, hydrogen storage system, and digital power management system to optimize energy efficiency. Additionally, a digital twin model will be developed to simulate performance and failure modes, aiding in the certification and design process. The project anticipates presenting its results in 2026 and will contribute to setting guidelines for future hydrogen projects in the aviation industry.