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The idea here is to do basically a cryoplane. Hydrogen can be generated on demand for the planes to refuel and can be stored highly compressed for that particul
by JAlexoid 6y ago
The idea here is to do basically a cryoplane. Hydrogen can be generated on demand for the planes to refuel and can be stored highly compressed for that particular use case. We're not talking about using it for GA or cars.
As for volume - there's a reason why they call them cryoplanes ;)
From Airbus - Liquid hydrogen is used as fuel for combustion with oxygen.
- ncmncm 6y agoLiquified. So, low pressure. Aerogel insulation makes the tanks practical. Volume on an aircraft is not expensive. Weight is expensive. Aerogel is very, very light. As is LH2. Airports can make the LH2 directly on the spot from solar and wind power, so no need to transport or refine fuels.
- p_l 6y agoCryogenic fuels also give possible efficiency boost by precooling inlet air, but that's bigger gain for Sabre-style engines (HOTOL, Skylon, etc. SSTOs) or for efficient supersonic airliners (proposed derivation of Tu-144 used liquid H2 to gain low operating costs for it's typical Ma 2 cruise speed.)