#81 | Proving Liquid Hydrogen Flight | AeroDelft’s Project Phoenix

Can liquid hydrogen aviation work with technology that exists **today**? In Episode 81 of **HYSKY Monthly**, we sit down with **Duuk Niemantsverdriet and Arthur Romanelli Chaves of AeroDelft** to go inside **Project Phoenix**—the student-led effort working to demonstrate hydrogen-electric flight and help advance the technology, safety practices, and certification pathways needed to make hydrogen aviation a reality. AeroDelft has already demonstrated its full-scale hydrogen-electric powertrain and completed a gaseous-hydrogen taxi test at an operational airport. Now, the team is working toward the next major milestones: **gaseous hydrogen flight and, ultimately, liquid hydrogen flight.** We get into the engineering behind the aircraft, including its fuel-cell powertrain, hydrogen storage, thermal management, cryogenic LH₂ system, heat exchanger, hydrogen venting, and the transition from gaseous to liquid hydrogen. Duuk and Arthur also explain why some of the hardest challenges aren't simply technical—they involve **safety, certification, infrastructure, regulation, and building confidence in hydrogen as an aviation fuel.** The conversation also explores AeroDelft's unusual model: a rotating student team taking on challenges normally associated with major aerospace companies, supported by an ecosystem of aviation, engineering, research, hydrogen, and technology partners. **In this episode:** Project Phoenix • Liquid vs. gaseous hydrogen • Hydrogen fuel cells • Cryogenic LH₂ storage • Thermal management • Hydrogen safety • Aircraft certification • Hydrogen infrastructure • The economics of hydrogen • The future of zero-emission aviation HYSKY is a 501(c)(3) nonprofit dedicated to the decarbonization of aviation and aerospace through **connection, community, advocacy, awareness, and education.** **Subscribe for more conversations with the engineers, founders, researchers, policymakers, and organizations building the future of hydrogen aviation.** #HydrogenAviation #LiquidHydrogen #AeroDelft #ProjectPhoenix #Hydrogen #Aviation #SustainableAviation #FuelCells #Aerospace #HYSKY