Airship Gryphon
From DQWiki

Summary
First encountered during the events of Gold Fever the Gryphon is an airship converted from a carrack by the gnomes of Serraine, belonging to the dwarves of the Everforge Trading Company, and captained by Clovis Stonebrow.
Powered by a dwarven steam engine of Superstition Mountains design and held aloft by "advanced lift-gas" generated by a "Clockspan-Wogglebottom" engine, the Gryphon is capable of a steady speed of 6 mph while carrying up to 20 tons on cargo in addition to a full crew and additional passengers.