Hydrogen: Not dangerous? I seem to recall reading somewhere that hydrogen in lighter-than-air craft is not inherently dangerous, although it does have a bad reputation because of the Hindenburg. If my memory is correct, some sort of design flaw was more to blame than the hydrogen. I think flammable airplane dope was used on the skin, and some heat source was not properly isolated. If this is correct [anybody out there know for sure?], then hydrogen might be a PR problem, but not an engineering problem.
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