Mammoth trains

mammoth_trains is a variable in the Openttd.cfg file, which allows the enabling ov very long trains.

This setting was only present in 1.2 and previous versions.

After version 1.2, the setting changed to Maximum Train Length.

When enabled, this allowed as much wagons you could fit into a 50 tile space on trains. The number may vary between trains, and train sets, but the trains will generally consists of 99 wagons (because most wagons take up about half of a tile, so 100-1 (for the engine) gives 99.) Without the patch, the limit was 9 tiles.

Some engines (such as the Lev4 "Chimaera") could increase the limit of tiles (Lev4 "Chimaera" could have 100 tile long trains) and carry more. However, multiple engines would have to be added in order for the train to move under all of that weight (imagine pulling a 99 car train, and each car was 27 tons each!) which would have to sacrifice some of your cars and replace them with engines.

Enabling
This feature is enabled by default. To turn it off, go to advanced settings (Vehicles / Enable building very long trains) or type this in the Openttd.cfg [patches]

mammoth_trains = false