ATSF 3450 class

Infobox Locomotive
name = ATSF 3450 class
powertype = Steam

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gauge = 4 ft 8½ in (1435 mm)
builder = Baldwin Locomotive Works
builddate = 1927
totalproduction = 10
whytetype = 4-6-4
uicclass = 2'C2'
driversize = 73 in (1854 mm)
boilerpressure = 220 lb/in² (1.52 MPa)
length = 97 ft 11 in (29.85 m)
weightondrivers = 198,000 lb (89,800 kg)
weight = 343,900 lb (156,000 kg)
locotenderweight = 639,260 lb (289,960 kg)
firearea = 88 ft² (8.12 m²)
cylindercount = 2
cylindersize = 25×28 in (635×711 mm)
tractiveeffort = 44,250 lbf (197 kN)
tenderc

valvegear = Walschaerts
railroad = Atchison, Topeka and Santa Fe Railway
roadnumber = #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.

Further images

References

* cite web
url = http://www.trainweb.org/rlhs/collection/Other_locomotives/ATSF_3450.html
title = Atchison, Topeka and Santa Fe 3450
work = Southern California Chapter, Railway and Locomotive Historical Society
accessdate = 2006-01-22
* cite web
url = http://www.steamlocomotive.com/hudson/atsf.shtml
title = Atchison, Topeka & Santa Fe Hudsons
author = Barris, Wes
work = SteamLocomotive.com
accessdate = 2006-01-22
* cite book
title = Santa Fe Railway
author = Blaszak, Michael and Glischinski, Steve
year = 2002
id = ISBN 0-7603-0380-0
publisher = MBI