#2724
Southern Pacific class AC-11
🇺🇸 United States ·built by Baldwin Locomotive Works· from 1942· class of 30 American 4-8-8-4 Cab forward locomotives
what is it?
Southern Pacific Railroad's AC-11 class of cab forward steam locomotives was the seventh class of 4-8-8-2 locomotives ordered by Southern Pacific (SP) from Baldwin Locomotive Works; SP was so pleased with the AC-10 class built a year earlier that the railroad began placing orders for AC-11s while the AC-10s were still being built and delivered. They were built between November 1942 and April 1943, closely resembling the AC-10s. The first AC-11, number 4245, entered service on November 24, 1942, and the last, 4274, on May 9, 1943.
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 84 years ago, in 1942.
- Weighs about as much as 50 African elephants (~6 t each).
- Served for 16 years (1942–1958).
steam locomotive: Burns coal, wood or oil to boil water; the steam drives pistons that turn the wheels.
spec sheet
- built
- 1942–1943
- in service from
- 1942
- retired
- 1958
- status
- retired
- number built
- 30
- 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
- 4-8-8-2
- weight
- 298 t
From the Wikipedia infobox and Wikidata. Blank means the sources don't say.
Sources: Wikidata Q7570292, Wikipedia: Southern Pacific class AC-11 (CC BY-SA 4.0).Updated 2026-10-25.