Southern Pacific class AC-2

Infobox Locomotive
name=Southern Pacific class AC-2
powertype=Steam
railroad=Southern Pacific Railroad
gauge=4 ft 8½ in (1435 mm)
railroadclass=AC-2
roadnumber=4017 – 4028
numinclass=12
driversize=57 in diameter
cylindersize=22 in dia × 30 in stroke
weight=481,200 lb
weightondrivers= convert|440800|lb|abbr=on
boilerpressure= 210 psi
tractiveeffort= convert|90940|lbf|abbr=on
feedwaterheater=4¼-BL Worthington
retiredate=1947 1948
disposition=scrapped
whytetype=2-8-8-2

Southern Pacific Railroad's AC-2 class of steam locomotives was the second in the AC series of cab forward locomotives built for Southern Pacific (SP). This class consisted of locomotives that were rebuilt from Baldwin-built SP MC-4 class locomotives by 1930.

The rebuild from MC-4 class gained the locomotives about convert|5000|lbf|kN in tractive effort, but also increased the locomotives' weight by about 50,000 pounds. The locomotives were deemed successful and remained in active service until after World War II.

References

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