Southern Pacific class AC-5
| Southern Pacific class AC-5 |
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| Type and origin |
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| Power type |
Steam |
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| Builder |
Baldwin Locomotive Works |
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| Serial number |
60866-60869, 60884-60889, 60952-60957 |
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| Build date |
July–September 1929 |
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| Specifications |
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| Configuration |
4-8-8-2 |
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| Gauge |
4 ft 8 1⁄2 in (1,435 mm) |
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| Driver diameter |
63 in (1,600 mm) |
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| Weight on drivers |
482,500 lb (218.9 t) |
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| Locomotive weight |
622,600 lb (282.4 t) |
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| Boiler pressure |
235 psi (1.62 MPa) |
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| Feedwater heater |
4¼-BL Worthington |
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| Cylinder size |
24 in × 32 in (610 mm × 810 mm) (bore × stroke) |
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| Performance figures |
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| Tractive effort |
116,900 lbf (520 kN) |
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| Career |
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| Operator(s) |
Southern Pacific Railroad |
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| Class |
AC-5 |
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| Number in class |
16 |
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| Number(s) |
4110-4125 |
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| First run |
August 16, 1929 |
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| Retired |
1955 |
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| Disposition |
scrapped |
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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.
References
- Diebert, Timothy S. and Strapac, Joseph A. (1987). Southern Pacific Company Steam Locomotive Conpendium. Shade Tree Books. ISBN 0-930742-12-5.