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For questions involving large flying objects that are lighter than air.

7 votes

How could an Earth-like planet support all-metal airships?

A related question attempted to achieve steampunk sailing ship-sized gondolas on airships in our current atmosphere and the answers did a good job of explaining the issues of weight and steam engine power … See here: Realistic Airships I don't see a world with a breathable gas atmosphere that could support such weight, unless you want to get into the realms of breathable liquid atmosphere, in which case …
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