In a world where the aviation industry is facing the challenge of reducing its carbon footprint, ZeroAvia has emerged with a vision to revolutionize aviation using hydrogen-electric propulsion. The company recently published a whitepaper that outlines a pathway for scaling hydrogen-electric engines into larger regional turboprops, regional jets, and narrowbody aircraft, with the aim of significantly reducing aviation emissions by 2050. This initiative not only tackles the environmental impact but also aims to improve the economics of flight, allowing for sustainable growth in the industry. ZeroAvia plans to have the first commercial aircraft equipped with ZA600 engines, designed for 10-20 seat aircraft, operational by 2025. Additionally, the company is working on developing a more powerful engine, the ZA2000, for 40-80 seat aircraft. The whitepaper delves into the technical aspects of hydrogen storage, power generation systems, electric propulsion systems, and more for each class of aircraft mentioned. Rudolf Coertze, the Head of Research & Development at ZeroAvia, recently presented on the topic at the Farnborough International Airshow, emphasizing the potential of hydrogen-electric propulsion in solving aviation's climate problem. ZeroAvia envisions a future where hydrogen-electric propulsion is scaled up to larger commercial jets, such as Airbus' A220 and Boeing's B737 family, to address the majority of flight emissions. The company aims to spark debate and educate stakeholders on the feasibility and benefits of fuel cell propulsion in the aviation sector. With a strong belief in the potential of hydrogen-electric propulsion, ZeroAvia and its industry partners are actively working towards a sustainable future for aviation, following the footsteps of the Wright brothers in driving innovation and change in the industry.