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The Southern Pacific AC-10 was the largest class of 4-8-8-2 cab forward steam locomotives ordered by Southern Pacific Railroad.

History[]

40 of these engines were built by the Baldwin Locomotive Works between January–July 1942 for the Southern Pacific system and were numbered 4205 – 4244. The first AC-10, No. 4205, entered service on February 17, 1942, and the last, No. 4244, on August 19, 1942.

They were used for both freight and passenger service on the Southern Pacific system, the design of this and the previous AC classes proved so successful for SP that the railroad began placing orders for the AC-10's successors, the AC-11s, while Baldwin Locomotive Works was still busy building and delivering the AC-10s.

Southern Pacific used these locomotives for about fifteen years, with the first retirements of this class occurring on April 5, 1955 and the last on September 24th, 1958. The locomotives were scrapped soon after they were retired, with the last one, No. 4243, scrapped on August 7, 1959. No surviving examples of this class were preserved with the small exception of the tender from No. 4219 which now serves as an Auxiliary water tender for Southern Pacific No. 4449 during excursion trains.

Stock list[]

Image Loco No. Build date(s) Builder Status
SP4205 4205 1942 Baldwin Locomotive Works Scrapped
Sp4206 4206 1942 Baldwin Locomotive Works Scrapped
Sl1600 4210 1942 Baldwin Locomotive Works Scrapped
SouthernPacific4212 4212 1942 Baldwin Locomotive Works Scrapped
Southern-Pacific-Cab-Forward-4213-1000-764 4213 1942 Baldwin Locomotive Works Scrapped
5b8465a8991202884029f151a5165575--roseville-california-dixon 4216 1942 Baldwin Locomotive Works Scrapped
TRNAT021601

20022520williams2520az2520sf2520engine252037512520extra2520tender

4219 1942 Baldwin Locomotive Works Scrapped with the sole exception of its tender which is used as an Auxiliary water tender behind Southern Pacific No. 4449.
Ecf64c1b6bb3f319996698536bd19972 4244 1942 Baldwin Locomotive Works Scrapped

Ffestrail coaches at Tanybwlch

Cab forward steam locomotives of the Southern Pacific Railroad
2-6-6-2 MM-2
4-6-6-2 AM-2
2-8-8-2 MC-1MC-2AC-1MC-4AC-2MC-6AC-3
4-8-8-2 AC-4AC-5AC-6AC-7AC-8AC-10AC-11AC-12
Preserved SP 4294 (AC-12)
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