my ESPEE MODELERS ARCHIVE

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

10 units built

The first 9 AC-4 class engines were built in 1928 and the last one in 1929 by Baldwin. These had a boiler pressure of 235lbs, a weight of 614,600lbs and a tractive effort of 116,900lbs.

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:
  • ?

• For HO Scale:
  • Broadway Limited AC-4

• For S Scale:
  • ?

• For O Scale:
  • ?