"The least obvious—and therefore most obvious—aspect of engines, at least as an indicator that a ship is powered by one, is their sails billowing in the æther. To fuel one of these engines someone must expend stamina as if they were casting a spell. This is enough to fuel one day's operation."
How exactly do golden barges traverse the humpbacked sky?
The anti-canonical answer to that is found here in the first issue of Ætherjack’s Almanac. Covering the three most common forms of engines, an unemployed elemental background, and npc statistics for air and fire elementals.
By Ian Woolley. Edited by Jared Sinclair.
32 pages, staple-bound softcover, 5.5 x 8.5 inches. Full color.