Observed arrival · 2026-10-31
MARID’s self-cooling hydrogen aircraft
A named designer’s concept for a long-endurance hydrogen fuel-cell UAV that routes fuel and waste heat through the aircraft’s structure.
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Aerospace engineers and hydrogen-aircraft researchers
- Worth noticing
- The baseline model gives 6.86 m² of cooled skin and a 77 W circulation-pump input for a 48-hour endurance target.
Field notes
The thermal architecture uses one closed hydrogen loop to collect heat from the fuel-cell stack, motor, and hotel loads, then carry it to cooled skin beneath the airframe. The page lists 4.2 kW of loop heat and 77 W of pump input in its baseline model. A separate studied variant adds a one-metre ram-air duct for cathode-exhaust dilution; these are presented as design and modeling details, not demonstrated flight performance.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
◉HumanPersonal, local, civic, or handmade
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