Hydrogen is a bitch to work with due to hydrogen metal embrittlement and the fact it leaks. However, it is a great fuel relative to weight and power produced. If all the problems can be solved, it will be Elon Musk’s engineers that do it. I wish him well.
Two very hard to beat critical problems.
But it does go BANG real good, if you like vertical acceleration.
I was wondering about embrittlement. Maybe if they use a fuel cell it’s less of a problem but fuel cells are expensive
Only two words..Hindenburg.
Years ago I toured a hydrogen fueling facility operated by a large transit agency. The biggest issues they had were the constant leaks, with resulting spontaneous combustion with an invisible flame! That and the 10,000psi tank pressure! The test buses never really ran, program was a total failure. Millions wasted.
...most likely the H2 is from Natural Gas production, water hydrolysis is a net energy loser.
Another corn-ethanol boondoggle in the making, probably!?