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Jet engines can burn hydrogen.

• tombert 5y ago
  Then would it make sense for Delta or United or KLM or something to start investing in retrofitting their planes to hydrogen? I would think that governments could give tax incentives to do so, and as a result make planes substantially less horrible for the environment.
  • kortex 5y ago
    Sorry, it would not remotely make sense. Planes store liquid fuel in the wings. They are engineered from square one to optimize for this design. Hydrogen requires either cryo or high pressure, neither are going to fit in the wing spaces. Even if you could physically make it work, you'd have to re-certify the plane, which just wouldn't happen. A hydrogen plane would have to be designed from the ground up.
  • flatiron 5y ago
    Interesting idea. Supply chain issues aside I don’t know if the current gas tanks could be retrofitted for hydrogen. Maybe fuel cells would be easier. Could just shoot water out of its little plane tush as its flying. Is there enough O2 at plane levels for fuel cells?