In a groundbreaking initiative, a team of researchers at ETH Zurich is leading the way in developing jet engines that utilize hydrogen as a fuel source, a key advancement in the realm of sustainable aviation. Nicolas Noiray, a Professor in the Department of Mechanical and Process Engineering, highlights the need to transition from kerosene-burning engines to hydrogen-based ones to reduce carbon emissions in the aviation sector. The team's experiments revealed challenges such as vibrations caused by hydrogen's faster combustion, which can potentially damage engine components. By carefully studying the acoustics of hydrogen flames under real flight conditions, the researchers aim to optimize engine designs to minimize vibrations. The project envisions creating hydrogen-powered aircraft engines that will undergo initial ground tests shortly, signaling a significant leap in sustainable aviation technology. Professor Noiray acknowledges the complexity of not only developing these engines but also establishing a supportive infrastructure for widespread hydrogen aviation adoption. He emphasizes that hydrogen, as the most economically viable sustainable fuel, holds immense potential in transforming the aviation industry towards a greener future. With a concerted effort from researchers and industry stakeholders, the vision of hydrogen-fueled aircraft operating efficiently in the skies could soon become a reality.