Airships: Conquer the Skies

[Xiahou]

Yeah, it looks like your suspendium chambers have no direct route to the coal bunkers. Crew probably has to tote coal throughout most of the ship to get it there- it's running out faster than they can get it there, and you lose lift.

Click the "Overlays" button in design mode. The Path overlay and Coal overlay should make the problem obvious. There's a surprising amount of depth to designs.