Southern Pacific class AC-5

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Southern Pacific class AC-5

Power type	Steam
Builder	Baldwin Locomotive Works
Serial number	60866-60869, 60884-60889, 60952-60957
Build date	July-September 1929
Configuration	4-8-8-2
Gauge	4 ft 8½ in (1435 mm)
Driver size	63 in diameter
Weight on drivers	482,500 lb
Locomotive weight	622,600 lb
Boiler pressure	235 psi
Feedwater heater	4¼-BL Worthington
Cylinder size	24 in dia × 32 in stroke
Tractive effort	116,900 lbf
Career	Southern Pacific Railroad
Class	AC-5
Number in class	16
Number	4110-4125
First run	August 16, 1929
Retired	1955
Disposition	scrapped

Southern Pacific Railroad's AC-5 class of steam locomotives was the railroad's second class of 4-8-8-2 cab forward locomotives. They were built between July and September 1929 and placed in service soon after construction. The AC-5 class was only slightly larger than the AC-4 class.

The first locomotive of this class, number 4110, holds the dubious honor of being the first 4-8-8-2 cab forward locomotive to be scrapped when it befell this fate on February 3, 1953, at the railroad's Sacramento, California, shops. The rest of the class were removed from service and scrapped by mid-1955. None of this class was preserved.

[edit] References

• Diebert, Timothy S. and Strapac, Joseph A. (1987). Southern Pacific Company Steam Locomotive Conpendium. Shade Tree Books. ISBN 0-930742-12-5. 

v • d • e Cab forward steam locomotives of Southern Pacific Railroad 2-6-6-2 MM-2 (rebuilt as 4-6-6-2) 2-8-8-2 MC-1 • MC-2 • AC-1 • MC-4 • AC-2 • MC-6 • AC-3 4-8-8-2 AC-4 • AC-5 • AC-6 • AC-7 • AC-8 • AC-10 • AC-11 • AC-12 Preserved SP 4294 (AC-12)