The development of hydrogen-electric powertrains is set to revolutionize the aviation industry by significantly reducing emissions and operating costs. These innovative engines offer a superior propulsion system that ensures lower fuel and maintenance costs, along with zero-emission flights. Compared to traditional turbines, hydrogen-electric engines provide a remarkable 90% reduction in life cycle emissions, making them a sustainable choice for the environment. Additionally, they offer a 40% decrease in fuel and maintenance costs and a 75% reduction in hourly maintenance costs, making them economically viable as well. Moreover, the hydrogen-electric engines boast impressive ranges that cover over 95% of missions flown today, including reserves. The ZA600 model is designed to be the future of propulsion for 10-20 seat aircraft, while the ZA2000 model is tailored for regional turboprops like the ATR and Dash 8 families. These advancements represent a significant step towards cleaner, more efficient, and cost-effective propulsion in the aviation sector, marking a positive shift towards sustainable air travel.