#1903

Union Pacific Class S-6

🇺🇸 United States ·built by Lima Locomotive Works· from 1920

1 photo from Wikimedia Commons · credits & licences

1. UP 4466 (31912062204): Marty Bernard from U.S.A.· Public domain

what is it?

The Union Pacific Class S-6 was a class of 0-6-0 switcher type steam locomotives built by the Lima Locomotive Works (LLW) for the Union Pacific Railroad (UP).

who runs it

Union Pacific Railroad

base stats

built 30made in total

Bars compare against all trains: 600 km/h (maglev), 1,700 seats; power, weight and number built on a log scale up to 20 MW, 1,000 t and 20,000 built.

fun facts

First built 106 years ago, in 1920.

steam locomotive: Burns coal, wood or oil to boil water; the steam drives pistons that turn the wheels.

spec sheet

built: 1920
status: preserved
number built: 30
kind: Steam
traction: steam
origin: 🇺🇸 United States
builders: Lima Locomotive Works
operators: Union Pacific Railroad
top speed: —
power: —
gauge: 1,435 mm standard gauge

From the Wikipedia infobox and Wikidata. Blank means the sources don't say.

Sources: Wikidata Q134722359, Wikipedia: Union Pacific Class S-6 (CC BY-SA 4.0).Updated 2026-10-25.