Researchers at ETH Zurich are at the forefront of developing jet engines that can utilize hydrogen as a fuel source, aiming to transform the aviation industry towards a more sustainable future. Unlike conventional jet engines that burn kerosene, these new engines will require technological adaptations to accommodate the unique combustion characteristics of hydrogen. Although electric vehicles have gained traction for short-distance transportation, the energy density limitations of batteries make them unsuitable for long-haul aviation. This is where hydrogen shines, offering a lightweight and high-energy-density fuel without carbon emissions. The project HYDEA focuses on studying the acoustic behavior of hydrogen flames in jet engines to mitigate vibrations that could potentially lead to material fatigue and damage. By optimizing the injection nozzles and combustion chamber geometry, researchers aim to develop a high-performance hydrogen engine suitable for commercial use in the near future. The research, published in the journal Combustion and Flame, marks a significant step towards realizing hydrogen-powered aviation. While the scientific advancements are promising, the real challenge lies in establishing the infrastructure needed to support widespread adoption of hydrogen-based aviation. Professor Nicolas Noiray emphasizes the importance of this aspect, highlighting the need for coordinated efforts to make hydrogen-fueled flights a reality. As the world shifts towards cleaner energy solutions, initiatives like the one at ETH Zurich play a crucial role in driving innovation in the aviation sector.