ATSF 3450 class
Encyclopedia
The Atchison, Topeka and Santa Fe Railway
's 3450 class comprised ten 4-6-4
"Hudson" type steam locomotive
s 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 wheel
s instead of their original 73-inch, and the boiler pressures increased from 220 lbf/in2. Combined, these changes reduced the starting tractive effort
from 44250 to 43300 lbf (196.8 to 192.6 kN), 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 Fair
grounds at Pomona, California
. It is not in operational condition but is preserved in good condition as a static exhibit.
Atchison, Topeka and Santa Fe Railway
The Atchison, Topeka and Santa Fe Railway , often abbreviated as Santa Fe, was one of the larger railroads in the United States. The company was first chartered in February 1859...
's 3450 class comprised ten 4-6-4
4-6-4
Under the Whyte notation for the classification of steam locomotives, 4-6-4 represents the wheel arrangement of four leading wheels on two axles , six powered and coupled driving wheels on three axles, and four trailing wheels on two axles .Other equivalent classifications are:UIC classification:...
"Hudson" type steam locomotive
Steam locomotive
A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...
s built by the Baldwin Locomotive Works
Baldwin Locomotive Works
The Baldwin Locomotive Works was an American builder of railroad locomotives. It was located in Philadelphia, Pennsylvania, originally, and later in nearby Eddystone, Pennsylvania. Although the company was very successful as a producer of steam locomotives, its transition to the production of...
in 1927
1927 in rail transport
- January events :* January 1 - John J. Bernet succeeds Frederick D. Underwood as president of the Erie Railroad.- February events :* February 14 - The Hull Paragon rail accident in England kills 12 people,- June events :...
. Built as coal-burners, they were converted to oil-burning during the 1930s. At the same time, the locomotives were given 79-inch driving wheel
Driving wheel
On a steam locomotive, a driving wheel is a powered wheel which is driven by the locomotive's pistons...
s instead of their original 73-inch, and the boiler pressures increased from 220 lbf/in2. Combined, these changes reduced the starting tractive effort
Tractive effort
As used in mechanical engineering, the term tractive force is the pulling or pushing force exerted by a vehicle on another vehicle or object. The term tractive effort is synonymous with tractive force, and is often used in railway engineering to describe the pulling or pushing capability of a...
from 44250 to 43300 lbf (196.8 to 192.6 kN), 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
San Joaquin Valley
The San Joaquin Valley is the area of the Central Valley of California that lies south of the Sacramento – San Joaquin River Delta in Stockton...
of California between Bakersfield
Bakersfield, California
Bakersfield is a city near the southern end of the San Joaquin Valley in Kern County, California. It is roughly equidistant between Fresno and Los Angeles, to the north and south respectively....
and Oakland
Oakland, California
Oakland is a major West Coast port city on San Francisco Bay in the U.S. state of California. It is the eighth-largest city in the state with a 2010 population of 390,724...
.
They were smaller and less powerful locomotives than the later 3460 class
ATSF 3460 class
The Atchison, Topeka and Santa Fe Railway's 3460 class comprised six 4-6-4 "Hudson" type steam locomotives built in 1937 by the Baldwin Locomotive Works for service between La Junta, Colorado and Chicago, Illinois, a fairly flat division of the railroad suited for the 4-6-4 type...
, 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 Fair
Los Angeles County Fair
The inaugural Los Angeles County Fair, now known as the L.A. County Fair, opened Oct. 17, 1922, and ran for five days through October 21, 1922, in a former beet field in Pomona, California. Highlights of the Fair’s first year were harness racing, chariot races and an airplane wing-walking...
grounds at Pomona, California
Pomona, California
-2010:The 2010 United States Census reported that Pomona had a population of 149,058, a slight decline from the 2000 census population. The population density was 6,491.2 people per square mile...
. It is not in operational condition but is preserved in good condition as a static exhibit.