Stralis Aircraft has achieved a significant milestone by successfully conducting a hydrogen-electric propeller spin test on a ground-demonstrator aircraft named 'Clyde' at Brisbane Airport. This test marks the first of its kind in the Southern Hemisphere and a crucial step towards emission-free flight. The aircraft utilized fuel cells and gaseous hydrogen, with the only emission being water vapor. The company is set to further this progress by aiming to have the sister aircraft, 'Bonnie,' operational in Queensland skies by 2025. Stralis' vision is to lead the way in emission-free aircraft production, focusing on high-performance, low-operating-cost hydrogen-electric propulsion systems. The successful test was made possible through collaborative efforts, including support from the Emerging Aviation Technology Partnerships Program initiated by the Australian Government. The test not only proves the viability of hydrogen technology in aviation but also highlights the overall cost-effectiveness of the propulsion system, with potential cost savings of 50% compared to traditional fuel options. Partnerships with entities like Brisbane Airport, Aviation Australia, and the Hydrogen Flight Alliance demonstrate a strong commitment to sustainable aviation practices and the advancement of green hydrogen technology in Australia.