Europe is making strides in the development of climate-neutral aviation by focusing on hydrogen-powered aircraft. The EU has launched a project aimed at supporting the adaptation of jet engines to run on hydrogen for medium-haul flights. Researchers at ETH Zurich, led by Professor Nicolas Noiray, are conducting experiments to address key challenges in developing hydrogen engines. One significant concern is controlling vibrations that can arise from the combustion of hydrogen, which differs from kerosene in its combustion characteristics. The team at ETH Zurich has established a test facility to simulate real flight conditions and measure the acoustics of hydrogen flames. By testing hydrogen injection nozzles and optimizing their design, engineers aim to pave the way for high-performance hydrogen engines that could power the first hydrogen-fueled aircraft in the near future. While engine development is crucial, Noiray emphasizes the importance of establishing a complete infrastructure for hydrogen aviation, including sustainable hydrogen production and transportation. Hydrogen emerges as a promising alternative to kerosene for aviation due to its lightweight energy storage capabilities. For larger aircraft with high payloads, jet engines fueled by hydrogen are likely to be the solution, with ongoing efforts by industrial consortia to develop such engines. However, challenges remain in scaling up hydrogen usage for aviation and ensuring the feasibility of hydrogen-powered flights over long distances. Overall, the optimism surrounding the transition to hydrogen aviation is met with the recognition of the collective effort needed to realize a sustainable future for air travel.