Southern Pacific class MC-6

Infobox Locomotive
name=Southern Pacific class MC-6
powertype=Steam
railroad=Southern Pacific Railroad
gauge=4 ft 8½ in (1435 mm)
railroadclass=MC-6
driversize=57 in diameter
hpcylindersize=26 in dia × 30 in stroke
lpcylindersize=40 in dia × 30 in stroke
weight=435,800 lb
weightondrivers=400,700 lb
boilerpressure=200 psi
tractiveeffort=94,880 lbf
whytetype=2-8-8-2
roadnumber=4029 – 4048
builder=Baldwin Locomotive Works
serialnumber=38523-38534, 38711-38713, 39673, 39731, 39857, 39858, 39874
builddate=October-December 1912 and April-May 1913
firstrundate=December 17 1912
retiredate=1946 – 1949
numinclass=20
disposition=scrapped

Southern Pacific Railroad's MC-6 class of steam locomotives is made up of two batches: the first consisting of 15 locomotives weighing 435,800 lb built in 1912, the second consisting of 5 locomotives weighing 437,100 lb built in 1913. All of the locomotives were built by Baldwin Locomotive Works. This was the last class of 2-8-8-2 locomotives that Southern Pacific (SP) ordered as cab forward locomotives.

Locomotive number 4043, the newest of the early class of MC-6 locomotives, was displayed at the Panama-Pacific International Exposition along with SP's first locomotive, "C. P. Huntington".

All but three of the locomotives in this class were rebuilt with "simpled" uniform cylinders of 22 in dia × 30 in stroke by 1930. The last three were thus rebuilt in 1937. During the rebuild, 4¼-BL Worthington feedwater heaters were also installed on the fireman's side of the locomotives.

After their rebuilds, the locomotives were used through the end of World War II with the last one scrapped on August 20 1949

References

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