How fast are they? I am guessing they are not jet engine; do they use hydrogen to generate electricity, or otherwise turn a propeller? If that is the case, they would (I think) be much slower. Given a choice of a six hour flight that destroys the planet and an eight hour flight that does not, plenty of people will pick the former."Thanks to climate-change concerns and the emergence of new manufacturing materials..." (Wall Street Journal 11/4/2022)
Hydrogen aircraft show hope.
ZeroAvia’s hydrogen engine
___
How fast are they?
I am guessing they are not jet engine; do they use hydrogen to generate electricity, or otherwise turn a propeller? If that is the case, they would (I think) be much slower. Given a choice of a six hour flight that destroys the planet and an eight hour flight that does not, plenty of people will pick the former.
Hydrogen vs Battery
__