Kawasaki Motors and French startup VoltAero have recently disclosed their joint venture to introduce a hydrogen-fueled version of the Cassio hybrid-electric aircraft's piston engine. This collaboration aims to leverage Kawasaki's expertise in propulsion systems to develop a supercharged aero piston engine family that will drive upcoming models of the Cassio aircraft. The companies have outlined their ambitious goal to certify a 6-cylinder hydrogen-fueled piston engine by the year 2035. This strategic move underscores a significant milestone in the aviation industry's shift towards sustainable practices by embracing hydrogen as a clean energy source for aircraft propulsion. The development of a hydrogen-powered aircraft engine not only demonstrates technological innovation but also aligns with the growing global emphasis on reducing carbon emissions in the aviation sector. With the pursuit of hydrogen propulsion, Kawasaki and VoltAero are spearheading the advancement of eco-friendly solutions in air transport, paving the way for a more sustainable future in aviation.