• Source: Southern Pacific class AC-11

      • 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. SP used these locomotives for between 12 and 15 years, with the last retirements from this class occurring on September 24, 1958. Shortly after their retirement, the AC-11s were scrapped, with the last, number 4274, in April of 1959.


      References




      Further reading


      Scribbins, Jim (1997). RailNews - Issues 398-403. Pentrex.
      Boyd, James (1992). Railfan & Railroad - Volume 11. Carstens Publications.
      Yenne, Bill (1994). Southern Pacific. SMITHMARK Publishers. ISBN 0831737883.
      Ransome-Wallis, P. (2013). Illustrated Encyclopedia of World Railway Locomotives. Dover Publications. ISBN 9780486142760.
      Diebert, Timothy S. & Strapac, Joseph A. (1987). Southern Pacific Company Steam Locomotive Conpendium. Shade Tree Books. ISBN 0-930742-12-5.

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