ATSF 3450 class

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ATSF 3450 class
ATSF 3450 class
Power type Steam
Builder Baldwin Locomotive Works
Build date 1927
Total production 10
Configuration 4-6-4
UIC classification 2'C2'
Gauge 4 ft 8½ in (1435 mm)
Driver size 73 in (1854 mm)
Length 97 ft 11 in (29.85 m)
Weight on drivers 198,000 lb (89,800 kg)
Locomotive weight 343,900 lb (156,000 kg)
Locomotive and tender combined weight 639,260 lb (289,960 kg)
Tender capacity 5,000 US gallons (19,000 L) oil, 15,000 US gallons (57,000 L) water
Boiler pressure 220 lb/in² (1.52 MPa)
Fire grate area 88 ft² (8.12 m²)
Cylinders 2
Cylinder size 25×28 in (635×711 mm)
Valve gear Walschaerts
Tractive effort 44,250 lbf (197 kN)
Career Atchison, Topeka and Santa Fe Railway
Number #3450–3459
Disposition #3450 preserved, rest scrapped

The Atchison, Topeka and Santa Fe Railway's 3450 class comprised ten 4-6-4 "Hudson" type steam locomotives built by the Baldwin Locomotive Works in 1927. Built as coal-burners, they were converted to oil-burning during the 1930s. At the same time, the locomotives were given 79 inch driving wheels instead of their original 73 inch, and the boiler pressures increased by 10 lb/in² to 230 lb/in². Combined, these changes reduced the starting tractive effort to 43,300 lb from 44,250 lb, but increased the top speed and efficiency. Their early service was in the Midwest, between Chicago, Illinois and Colorado; later, some were assigned to service in the San Joaquin Valley of California between Bakersfield and Oakland.

They were smaller and less powerful locomotives than the later 3460 class, but were capable of equivalently high speeds.

The first locomotive built, #3450, was donated by the Santa Fe in 1955 to the Railway and Locomotive Historical Society's Southern California chapter, and is preserved at the Society's museum in the Los Angeles County Fairgrounds at Pomona, California. It is not in operational condition but is preserved in good condition as a static exhibit.

[edit] Further images

Front of #3450

Side of #3450

[edit] References


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