In a recent homebrew setting I developed for an ongoing campaign, skyships were the purview of the Dwarven Sky Baronies. These "mountain dwarves" lived up in a string of massive, mountainous earth motes (they weren't always in the sky, but once their ancestral mountain homes sent skyward in a great cataclysm). In collaboration with the gnomes (for their tinker tech) they figured out how to carve out chunk of their floating rock "islands" to build zepplin-like vessels of solid stone. Because, in our setting, we decided that earth mote stone naturally "anchors" and resists moving too much, the gnometech engines were invented to use electromagnetic generators to trick the rock vessels into falling in a desired direction.
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