Fluid wagon

The Fluid wagon is a rail vehicle used to transport fluids between train stations. It is filled and emptied by pumps at a station rather than by direct hand interaction, so its usefulness depends on proper station layout and train alignment.

To load or unload a Fluid wagon, the station must have pumps positioned beside the wagon. The wagon must be aligned exactly to the rail grid, which is done by sending a fueled locomotive to a train stop as a schedule destination. The rails under the wagon must be straight rails, not curved rails, and the wagon must be perfectly orthogonal to the grid for the pumps to work. If the train is misaligned, the pumps will not transfer any fluid.

Transfer speed improves by using more pumps on a single wagon, up to a maximum of 3 pumps per wagon. Pump quality also affects pumping speed. The time to transfer a full Fluid wagon varies with pump quality and pump count, with more pumps significantly reducing the total time:

• 1 pump: 42, 33, 27, 22, or 17 seconds depending on quality
• 2 pumps: 29, 17, 14, 11, or 9 seconds
• 3 pumps: 14, 11, 9, 8, or 6 seconds

These times are rounded up.