Researchers at the FAMU-FSU College of Engineering have developed a liquid hydrogen storage and delivery system to enable zero-emission aviation. The system is designed for a 100-passenger hybrid-electric aircraft, utilizing hydrogen fuel cells and hydrogen turbine-driven superconducting generators. This innovative system not only efficiently stores and transfers liquid hydrogen but also uses it as a cooling medium for critical onboard systems, supporting power needs during takeoff, cruising, and landing. The team's comprehensive system-level optimization focused on cryogenic tanks, introducing a new gravimetric index to maximize usable hydrogen fuel mass. By optimizing key design parameters, they achieved a gravimetric index of 0.62, significantly improving upon traditional designs. The system's thermal management is handled by routing ultra-cold hydrogen through heat exchangers that remove waste heat from onboard components. A pump-free system regulates hydrogen flow by controlling tank pressure using hydrogen gas injection and venting, ensuring the correct flow rate across all flight phases. The staged thermal integration allows liquid hydrogen to serve as both a coolant and fuel, enhancing system efficiency while minimizing complexity. The next phase involves experimental validation of the prototype system at FSU's Center for Advanced Power Systems as part of NASA's Integrated Zero Emission Aviation program. Collaborating with other universities, the project aims to advance clean aviation technologies in hydrogen storage, thermal management, and power system design.