I think we'll see a synthetic version of jet fuel before we see a hydrogen powered plane in mass production.

Far less trouble to store and use and much higher energy density, also works with existing airframes (fuel tanks!) and engines.

Plus it works with the FAA and with the existing expertise in the Airline industry.

The big problem is that fueling with liquid hydrogen is not easy. Getting things down to that temperature is not easy. Getting hydrogen cleanly is not easy.

I mean if hydrogen was just as abundant in the atmosphere as oxygen and didn’t need to be at ridiculous temperatures to be liquid, it would be a great fuel.

But to keep things green you’re fighting a ton of trade-offs using electricity, it which point why don’t you just use the electricity directly?

My understanding of the airline industry is that it will be MUCH easier to further synthesise that green hydrogen into proper jet fuel than to build and certify a jet that runs on Hydrogen.