Southern Pacific class MC-4
Performance figures | |
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Tractive effort | 85,040 lbf (378.28 kN) |
Career | |
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Operators | Southern Pacific Railroad |
Class | MC-4 |
Numbers | 4017 – 4028 |
First run | July 21, 1911 |
Retired | 1947 – 1948 |
Disposition | scrapped |
Southern Pacific Railroad's MC-4 class of steam locomotive was the second class ordered and built as cab forward locomotives. Southern Pacific (SP) found the MC-2 class sufficient for a proof-of-concept for cab forward locomotives and sought to continue with now tested designs.
In service, SP found that the locomotives were a little too slow for the traffic needs. By 1930, all of the MC-4 class had been "simpled" to use uniform size cylinders and feedwater heaters were installed to address the issue. They were then reclassified as AC-2 locomotives. As rebuilt, the locomotives continued in service through the end of World War II.
References
- 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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- SP 4269 (AC-12)
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