Union Pacific FEF series

what is it?

The Union Pacific FEF series consists of forty-five 4-8-4 "Northern" steam locomotives built in three classes for the Union Pacific Railroad by the American Locomotive Company (ALCO) between 1937 and 1944. The FEF acronym comes from the first letters of the wheel arrangement, Four Eight Four. They were in operation until overtaken by dieselization, with all but one retired by 1959.

who runs it

Union Pacific Railroad

base stats

• weight 211 tin working order
• built 45made 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 89 years ago, in 1937.
• 🐘Weighs about as much as 35 African elephants (~6 t each).
• 📏34.8 m long: about 8 cars parked nose to tail.
• ⌛Served for 25 years (1937–1962).

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

spec sheet

built

1937–1944

in service from

1937

retired

1962

status

in service

number built

45

kind

Steam

traction

steam

origin

🇺🇸 United States

builders

American Locomotive Company

operators

Union Pacific Railroad

top speed

—

power

—

gauge

1,435 mm standard gauge

wheel arrangement

4-8-4

length

34.8 m

weight

211 t

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