I didn't say it would be an equal problem, I said that you will have similar problems if an airplane fuel tank catches fire. The problems you're raising are def

I didn't say it would be an equal problem, I said that you will have similar problems if an airplane fuel tank catches fire. The problems you're raising are definitely real problems, I just think they can be designed around. The engineering problems obviously aren't large enough to prevent something like the Tu-155 from using liquid hydrogen. Whether it can ultimately made as safe as conventional aircraft, I don't know. Maybe not. Either way, I don't think the economics are favorable for hydrogen.