| 1 | Historical development and future potential of hydrogen energy in the aviation sector | 1 |
| 2 | Basic operating principles of hydrogen fuel cells | 1 |
| 3 | Design features of PEM-type fuel cells used in aircraft | 1 |
| 4 | Liquid hydrogen storage systems in aircraft | 1 |
| 5 | Fuel cell-battery integration strategies in hybrid-electric aircraft systems | 1 |
| 6 | Design criteria for hydrogen-fueled unmanned aerial vehicles (UAVs) | 1 |
| 7 | Current prototypes and projects for the use of hydrogen in commercial passenger aircraft | 1 |
| 8 | Analyzing the technical specifications of hydrogen-powered vertical takeoff and landing (VTOL) systems | 1 |
| 9 | Aerodynamic and material engineering challenges of hydrogen-powered hypersonic aircraft | 1 |
| 10 | Economic analysis of hydrogen-fueled aircraft | 1 |
| 11 | Aerodynamics of hydrogen-powered aircraft | 1 |
| 12 | Hydrogen-powered The relationship between aerodynamics and materials engineering in hypersonic aircraft | 1 |
| 13 | Evaluation of current developments and future visions of hydrogen technologies in aircraft | 1 |
| 14 | Evaluation of current developments and future visions of hydrogen technologies in aircraft | 1 |