#1556
Southern Pacific class AM-2
🇺🇸 United States ·built by Baldwin Locomotive Works· from 1911· class of 12 American 4-6-6-2 cab forward locomotives rebuilt from MM-2 class
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1 photo from Wikimedia Commons · credits & licences
- 1. Image from page 281 of "Railway age gazette" (1913): Internet Archive Book Images· CC0
what is it?
Southern Pacific Company's AM-2 class of steam locomotives was Southern Pacific's (SP) only class of 4-6-6-2 "Mallet" type steam locomotives ordered and built as cab forward locomotives. They were actually MM-2s that had been upgraded. MM-2s were built in 1911 by Baldwin Locomotive Works and entered service on SP beginning September 19, 1911.
who runs it
base stats
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 115 years ago, in 1911.
- Weighs about as much as 29 African elephants (~6 t each).
- Served for 37 years (1911–1948).
steam locomotive: Burns coal, wood or oil to boil water; the steam drives pistons that turn the wheels.
spec sheet
- built
- 1911
- in service from
- 1911
- retired
- 1948
- status
- retired
- number built
- 12
- kind
- Steam
- traction
- steam
- origin
- 🇺🇸 United States
- builders
- Baldwin Locomotive Works
- operators
- Southern Pacific Transportation Company
- top speed
- —
- power
- —
- gauge
- 1,435 mm standard gauge
- wheel arrangement
- 4-6-6-2
- weight
- 175 t
From the Wikipedia infobox and Wikidata. Blank means the sources don't say.
Sources: Wikidata Q7570303, Wikipedia: Southern Pacific class AM-2 (CC BY-SA 4.0).Updated 2026-10-25.