Unither Bioelectronics, a subsidiary of United Therapeutics in Canada, successfully conducted the first piloted flight of a hydrogen-powered helicopter. The company modified the piston-powered Robinson R44 helicopter, installing a hydrogen tank under the tailboom and two cooling nacelles on each side of the cabin. This groundbreaking achievement demonstrates the potential for hydrogen as a clean fuel source in aviation. The modification of the R44 to run on hydrogen signifies a major step forward in the aerospace industry's efforts to adopt sustainable and eco-friendly technologies. Canada's role in leading this innovation highlights the country's commitment to exploring alternative energy sources for the aviation sector. The successful flight of the hydrogen-powered helicopter paves the way for future developments in clean energy aviation, setting a new standard for environmentally conscious practices in the industry.