this post was submitted on 21 Mar 2026
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[–] captain_aggravated@sh.itjust.works 1 points 1 day ago (1 children)

Not for main propulsion of aircraft; to do the work of a jet airliner, you'd need electric motors driving ducted fans and fuel cells plus transmission cables and such capable of handling 5 to 10 megawatts. You'd also need to figure out a source of hot high pressure air for deicing systems and cabin pressure as that's usually taken from the compressors of the main engines. You'll see hydrogen burning turbofans before you see fuel cell powered airliners. I could see a fuel cell replace a turbine APU if you did build a hydrogen powered jet though.

[–] Buffalox@lemmy.world 0 points 1 day ago* (last edited 1 day ago) (1 children)

Fuel cell planes:
https://www.airbus.com/en/innovation/energy-transition/hydrogen/zeroe-our-hydrogen-powered-aircraft

https://zeroavia.com/

The ZeroAvia is an actually working plane:

https://en.wikipedia.org/wiki/ZeroAvia

In August 2021, ZeroAvia completed its first high-power run of the ZA-600, a hydrogen aircraft engine.

So they've existed for years now, and the concept is proven.

[–] SaveTheTuaHawk@lemmy.ca -2 points 22 hours ago (1 children)

Those are small, short range aircraft, the technology does not scale.

[–] Buffalox@lemmy.world 0 points 19 hours ago

the technology does not scale.

And exactly how do you conclude that? That quad propeller Airbus design is at least 100 passengers, and Airbus say you can also burn Hydrogen directly in jet engines.