A Mallet locomotive is a type of compound articulated steam locomotive, invented by the Swiss engineer Anatole Mallet (1837–1919).
Under the Whyte notation for the classification of steam locomotives, a 2-10-4 locomotive has two leading wheels on one axle, usually in a Bissel truck, ten coupled driving wheels on five axles, and four trailing wheels on two axles, usually in a bogie. These were referred to as the Texas type in most of the United States, the Colorado type on the Burlington Route, and the Selkirk type in Canada.
Under the Whyte notation for the classification of locomotives, 4-6-4 represents the wheel arrangement of four leading wheels, six powered and coupled driving wheels and four trailing wheels. In France where the type was first used, it is known as the Baltic while it became known as the Hudson in most of North America.
Under the Whyte notation for the classification of steam locomotives, 4-8-4 represents the wheel arrangement of four leading wheels on two axles, eight powered and coupled driving wheels on four axles and four trailing wheels on two axles. The type was first used by the Northern Pacific Railway, and initially named the Northern Pacific, but railfans and railroad employees have shortened the name since its introduction. It is most-commonly known as a Northern.
The Atchison, Topeka and Santa Fe Railway, often referred to as the Santa Fe or AT&SF, was one of the larger railroads in the United States. The railroad was chartered in February 1859 to serve the cities of Atchison and Topeka, Kansas, and Santa Fe, New Mexico. The railroad reached the Kansas–Colorado border in 1873 and Pueblo, Colorado, in 1876. To create a demand for its services, the railroad set up real estate offices and sold farmland from the land grants that it was awarded by Congress.
Under the Whyte notation for the classification of steam locomotives, 2-10-2 represents the wheel arrangement of two leading wheels, ten powered and coupled driving wheels, and two trailing wheels. In the United States and elsewhere the 2-10-2 is known as the Santa Fe type, after the Atchison, Topeka and Santa Fe Railway that first used the type in 1903.
Under the Whyte notation for the classification of steam locomotives by wheel arrangement, 4-4-2 represents a configuration of a four-wheeled leading bogie, four powered and coupled driving wheels, and two trailing wheels supporting part of the weight of the boiler and firebox. This allows a larger firebox and boiler than the 4-4-0 configuration.
Under the Whyte notation for the classification of steam locomotive wheel arrangements, a 2-10-10-2 is a locomotive with two leading wheels, two sets of ten driving wheels, and a pair of trailing wheels.
Atchison, Topeka and Santa Fe 2926 is a class "2900" 4-8-4 type steam locomotive built in May 1944 by the Baldwin Locomotive Works for the Atchison, Topeka & Santa Fe Railway (ATSF). It was used to pull passenger and fast freight trains, mostly throughout New Mexico, until it was retired from revenue service in 1953. Three years later, it was donated to Coronado Park in Albuquerque for static display.
The Atchison, Topeka and Santa Fe Railway's 3460 class comprised six 4-6-4 "Super 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. They were substantially larger than the road's earlier 3450 class locomotives, and all were built oil-fired, although in a manner that would allow for easy conversion to coal firing. All were fitted with SKF roller bearings on every axle.
The Santa Fe class 3450 consisted of ten 4-6-4 "Hudson" type steam locomotives built by the Baldwin Locomotive Works in 1927. Built as coal-burners, they were later converted to oil-burning during the 1930s. At the same time, the locomotives were given 79-inch (2,007 mm) driving wheels instead of their original 73-inch (1,854 mm), and the boiler pressures increased from 220 to 230 lbf/in2. Combined, these changes reduced the starting tractive effort from 44,250 to 43,300 lbf, but increased the top speed and efficiency. Their early service was in the Midwest, between Chicago and Colorado; later, some were assigned to service in the San Joaquin Valley of California between Bakersfield and Oakland.
Southern Pacific 2479 is one of six 4-6-2 heavy "Pacific" type steam locomotives built by Baldwin Locomotive Works in 1923 for the Southern Pacific Railroad (SP), designated the P-10 class. No. 2479 was retired from service in 1956. The locomotive is currently undergoing restoration to operating condition by the Pacific Locomotive Association at Brightside, California.
An oil burner engine is a steam engine that uses oil as its fuel. The term is usually applied to a locomotive or ship engine that burns oil to heat water, to produce the steam which drives the pistons, or turbines, from which the power is derived.
Pennsylvania Railroad Class L1s were 2-8-2 "Mikado"-type steam locomotives that were used on the Pennsylvania Railroad during the early twentieth century. These 574 locomotives were manufactured between 1914 and 1919 by the railroad's own Juniata Shops as well as the Baldwin Locomotive Works (205) and the Lima Locomotive Works (25).
The South African Railways Class 20 2-10-2 of 1935 was a steam locomotive.
Under the Whyte notation for the classification of steam locomotive wheel arrangements, a 4-4-6-2 is a locomotive with two pairs of leading wheels, one set of four driving wheels, a second set of six driving wheels, and a pair of trailing wheels.
The Manila Railroad 200 class were 2-10-2 Santa Fe steam locomotives operated by the Manila Railroad Company (MRR), predecessor of the Philippine National Railways. They were built alongside the 4-8-2 Mountain-type 170 class by the American Locomotive Company at its Brooks facility between 1921 and 1922. During its service at the MRR, it carried heavy freight trains on the South Main Line between Manila and the Bicol Region.
A jointed-boiler locomotive was a variant of the Mallet articulated locomotive, in which a flexible coupling was introduced midway along the length of the boiler casing, which allowed the boiler to bend laterally when the locomotive was on curved track.
Atchison, Topeka and Santa Fe No. 1316 is a preserved 1309 class 4-6-2 "Pacific" type steam locomotive built by the Baldwin Locomotive Works in 1911 for the Atchison, Topeka and Santa Fe Railway. It was frequently used for pulling fast passenger trains in Texas, until it was reassigned to freight service in the late 1940s. After being retired in 1954, it was donated to the Fort Concho Museum in San Angelo, Texas for static display. In 1980, No. 1316 was acquired by the Texas State Railroad, who moved it to Rusk, Texas and restored it in 1982 as their No. 500. It continued to operate there until 2002, when it was found to be due for an overhaul, and it spent several years in storage, disassembled. As of 2023, No. 1316 has been put back together during a cosmetic restoration and it is awaiting the necessary overhaul required to operate it again.
The Southern Railway Ss was a class of 2-10-2 "Santa Fe" type steam locomotives built in 1917 and 1918 for the Southern Railway (SOU). They were assigned to haul and bank heavy freight trains over the Saluda Grade and Old Fort Loops in the Blue Ridge Mountains of North Carolina.
