my ESPEE MODELERS ARCHIVE

California's Railroad to the U.S. 1861 - 1996

25 units built

SP AC-6 #4148 was caught in Dunsmuir, California on August 14, 1938. Photo from the collection of Gene Deimling.

The first 23 AC-6 class engines were built in 1930 and the last two in 1931 by Baldwin. These differed from previous AC-4's and AC-5's with amongst other things a higher boiler pressure of 250lbs, a weight of 648,000lbs and a tractive effort of 124,300lbs.

According to a note on the SP lettering drawing dated 12/30/49 all AC class engines assigned to Sacramento, Shasta, Portland, and San Joaquin Divisions shall omit the large SOUTHERN PACIFIC on the tender sides, also F class engines on Shasta Division. Photo evidence shows that this was often but not always the case. Charles Givens

All scrapped by 1955.

References:

• A Century of SP Steam Locomotives - Guy L. Dunscomb
• SP Co. Steam Locomotive Compendium - Diebert & Strapac
• Cab-Forward - Robert J. Church
• Cab-In-Front (The Half Century Story of An Unconventional Locomotive) - John.B.Hungerford © 1959
  • reprinted by PFM 1974

Modeling choices at the moment are:

• For N Scale:
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• For HO Scale:
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• For S Scale:
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• For O Scale:
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