If the industry wants to consider hydrogen, perhaps a return to the Hindenburg-style airships is in order? (sarcasm)
Capable of transAtlantic flights, 79 mph top speed–twice as many crew as passengers–ON THE OTHER HAND, there IS that FAMOUS FILM OF ITS FINAL FLIGHT.
No, Thank You–I’ll stick with wings–carbon-based liquid fuels–and internal combustion engines–nothing in the industry has had a better safety and economic record for nearly 100 years…BUT DREAMERS CAN KEEP ON DREAMING!