this post was submitted on 20 May 2024
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Airships only make sense in a world in which the economy takes into account ecodestruction. Kind of like wind-powered ships. If we didn't know what GHGs do environmentally, which offset any short-term efficiency gains provided by burning hydrocarons, nobody would ever dream of abandoning these miracle fuels. So you can only examine the efficiency of airships with hydrocarbons off the table entirely.
They do plenty of ecodestruction. If we had them now, they'd be fueled by hydrocarbons. That could hypothetically be batteries in the future, but batteries good enough for that could do equally well in airplanes.
The material used in making them rigid also has a carbon cost.
I think they'd be solar powered with some kind of thin film photovoltaic. You don't need much battery in that case. While some carbon cost is inevitable, the point is they wouldn't ever compete with something that burns kerosene.
There are plenty of other options that don't burn kerosene.