QuoteAs a liquid, H would actually take up less room than FF tanks do.
You did not look at the fuel tanks in the jet schematic.
You know how light hydrogen is. It is the lightest element. 'As a liquid, H would actually take up less room than FF tanks do.' is something that makes no sense. The lighter weight means more room needed for the same energy. A cubic meter of liquid hydrogen only weighs 70.85 kilograms. A cubic meter of water weighs 1000 kilograms.
Pointing out that the Hindenburg only used a gas and not liquid hydrogen does not help your case. Pointing out that they only used it for lift also does not help your case. At atmospheric pressure the hydrogen burn was as mild as it could be with heat and burning gas mostly going up and away.
The Hindenburg displaced a volume of approximately 200,000 cubic meters. Air weighs 1.225 kg per cubic meter so the lift is 245,000 Kg. The actual figure was 238,000 kilograms Hydrogen gas weighs 0.090 Kg. per cubic meter, which is about 1/11th the weight of air. Using the 245000 Kg figure and dividing it by ll gives 22,272 Kg of hydrogen. Converted to a liquid that is 314 cubic meters of liquid hydrogen.
A Boeing 747 could fly 14,000 kilometers on that much power. It turns out the Hindenberg had the explosive power of a intercontinental hydrogen powered jet with a full tank. Exploded in the most gentle way possible.
Liquid spills are not as bad as I thought, but hydrogen is strange stuff. Under the right conditions unpredictable things will make news. The Hindenberg turns out to be a reasonable approximation of a Hydrogen powered jet aircraft accident. I can say that because of the large quantities of liquid that would be spilled. The 6000 gallon test in the guvmint film seems big, but a real spill would be larger.