144
'Windmill': China tests world’s first megawatt-level airship to capture high winds
(interestingengineering.com)
this post was submitted on 25 Sep 2025
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0.18 to 0.08 is a gigantic difference, less than half the weight per cubic meter of displacement !!
Not only is cost an issue, but the larger the volume of displaced air, the bigger the dirigible, the harder it becomes to move through the atmosphere, more friction, more air resistance etc..
Fair points, I hadn't considered the economic side of it; or even the mass beyond how it affects lift.