Hydrogen Craft Corporation

Hydrogen fuel cell drones are unmanned aerial vehicles powered by on-board hydrogen fuel cell systems rather than, or in addition to, lithium battery packs, enabling substantially longer flight times and ranges with zero direct emissions aside from water vapor.[10] In the Hiroshima project, hydrogen drones developed by Robodex are expected to fly long-distance routes between the LOGI'Q Hiroshima logistics hub and islands in the Seto Inland Sea, carrying supplies and demonstrating how hydrogen propulsion can support practical logistics missions.[1][8]

Drone configurations: rotor wing drones (multi-rotor or helicopter-like) for VTOL and hovering, and fixed/composite wing drones for greater flight efficiency and range.