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Under the Whyte notation for the classification of steam locomotives, 0-4-0 represents one of the simplest possible types, that with two axles and four coupled wheels, all of which are driven. The wheels on the earliest four-coupled locomotives were connected by a single gear wheel, but from 1825 the wheels were usually connected with coupling rods to form a single driven set.
0-6-0 is the Whyte notation designation for steam locomotives with a wheel arrangement of no leading wheels, six powered and coupled driving wheels on three axles, and no trailing wheels. Historically, this was the most common wheel arrangement used on both tender and tank locomotives in versions with both inside and outside cylinders.
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, 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, 2-6-0 represents the wheel arrangement of two leading wheels on one axle, usually in a leading truck, six powered and coupled driving wheels on three axles and no trailing wheels. This arrangement is commonly called a Mogul.
Under the Whyte notation for the classification of steam locomotives, 2-8-0 represents the wheel arrangement of two leading wheels on one axle, usually in a leading truck, eight powered and coupled driving wheels on four axles, and no trailing wheels. In the United States and elsewhere, this wheel arrangement is commonly known as a Consolidation, after the Lehigh and Mahanoy Railroad’s Consolidation, the name of the first 2-8-0.
Under the Whyte notation for the classification of steam locomotives, 0-8-0 represents the wheel arrangement of no leading wheels, eight powered and coupled driving wheels on four axles and no trailing wheels. Locomotives of this type are also referred to as eight coupled.
Under the Whyte notation for the classification of steam locomotives by wheel arrangement, a 2-6-6-2 is a locomotive with one pair of unpowered leading wheels, followed by two sets of three pairs of powered driving wheels and one pair of trailing wheels. The wheel arrangement was principally used on Mallet-type articulated locomotives, although some tank locomotive examples were also built. A Garratt locomotive or Golwé locomotive with the same wheel arrangement is designated 2-6-0+0-6-2 since both engine units are pivoting.
The GWR 1400 Class is a class of steam locomotive designed by the Great Western Railway for branch line passenger work. It was originally classified as the 4800 Class when introduced in 1932, and renumbered in 1946.
The Great Western Railway (GWR) 2301 Class or Dean Goods Class is a class of British 0-6-0 steam locomotives.
Pere Marquette 1225 is a class "N-1" 2-8-4 "Berkshire" type steam locomotive built in October 1941 for the Pere Marquette Railway (PM) by Lima Locomotive Works (LLW) in Lima, Ohio. No. 1225 is one of two surviving Pere Marquette 2-8-4 locomotives, the other being 1223, which was on display at the Tri-Cities Historical Society near the ex-Grand Trunk Western (GTW) coaling tower in Grand Haven, Michigan, and both have the distinction of being the only surviving Pere Marquette steam locomotives left in preservation. No. 1225 was well known to be the basis for the locomotive used in the 2004 film The Polar Express, earning itself the nickname "The Real Polar Express."
The Pennsylvania Railroad's class AA1 comprised two experimental electric locomotives constructed in 1905 by the company's own Altoona Works with the assistance of Westinghouse. Intended as testbeds as the PRR began its electrification project, both locomotives remained service into the 1930s.
The Chicago, Milwaukee, St. Paul and Pacific Railroad classes EP-1 and EF-1 comprised 42 boxcab electric locomotives built by the American Locomotive Company (Alco) in 1915. Electrical components were from General Electric. The locomotives were composed of two half-units semi-permanently coupled back-to-back, and numbered as one unit with 'A' and 'B' suffixes. As built, 30 locomotives were assigned to freight service, classified as EF-1 and numbered 10200–10229. The remaining twelve locomotives were assigned to passenger service as class EP-1, numbered 10100–10111, with higher-speed passenger gearing. The design was highly successful, replacing a much larger number of steam locomotives, cutting costs and improving schedules. General Electric self-proclaimed this electric locomotive to be the “King of the Rails” in a silent promotional film from 1915.
The Baltimore and Ohio Railroad's sole class V-2 4-6-4 steam locomotive, No. 2 Lord Baltimore, was constructed by the railroad's own Mount Clare Shops in 1935. It was built under the direction of the road's master mechanic George Emerson, and said to have been inspired by the Great Western Railway locomotive 6000 King George V which had appeared at B&O's 1927 Fair of the Iron Horse.
On the Baltimore and Ohio Railroad, locomotives were always considered of great importance, and the railroad was involved in many experiments and innovations.
The Class PtL 2/2 locomotives of the Royal Bavarian State Railways were light and very compact superheated steam locomotives for operation on Bavarian branch lines. There were three types in total, of which two were transferred to the Deutsche Reichsbahn-Gesellschaft as Class 98.3 tank locomotives and even survived to join the Deutsche Bundesbahn fleet after the Second World War.
Western Maryland Scenic Railroad No. 734, also known as Mountain Thunder, is an SC-1 class 2-8-0 “Consolidation” type steam locomotive originally built by the Baldwin Locomotive Works in 1916 for the Lake Superior and Ishpeming Railroad (LS&I) as No. 18. It was renumbered to 34 in 1925. No. 34 was used to pull heavy iron ore trains for the LS&I, until it was retired in 1961. The locomotive was subsequently sold to the Marquette and Huron Mountain Railroad, where it was stored in a sideline alongside other LS&I steam locomotives. In 1971, No. 34 was sold to the Illinois Railway Museum for static display.
Atchison, Topeka and Santa Fe No. 769 is a preserved 769 class 2-8-0 "consolidation" type steam locomotive originally built by the Richmond Locomotive Works in 1900 as one of the Santa Fe Pacific Railroad's final locomotives. It was originally numbered 266 before the SFP had completely merged into its parent company, the Atchison, Topeka and Santa Fe Railway, and the locomotive was renumbered 3045, and it was eventually renumbered again to 769. The locomotive was put into use for short-distance freight trains and for yard switching before being sold again in 1950 to the Albuquerque and Cerrillos Coal Company in Madrid, New Mexico for more yard switching and short distance coal trains. As the 1950s progressed, however, the company shut down due to bankruptcy, and No. 769 was abandoned along with the rest of the locomotive yard and the rest of Madrid. In the late 1970s the town was recovered and converted into a heritage town, and No. 769 was then put on static display just behind the shed it was stored in, which was converted to the Engine House Theatre. In early 2020, No. 769 was selected for a future project to restore it to operating condition to eventually run on reconstructed trackage between Madrid and a nearby BNSF interchange near Los Cerrillos.
The Manila Railway 70 class of 1908 was a class of at least twenty-two 0-6-2 side and well-tank locomotives built by the North British Locomotive Company. These locomotives were first put into service on a mainline during the late 1900s and early 1910s by the Manila Railway Company. Their primary purpose was to support the growing network and replace the aging Dagupan class engines. They were used on all the lines of the Manila Railway and its succeeding incarnation, the Manila Railroad. Over time, some locomotives were either scrapped or given to sugarcane plantations after being withdrawn. The last unit, No. 79, remained in service with the Pampanga Sugar Development Company as late as 1989.
Wilmington and Western 58 is an 0-6-0 "Switcher" type steam locomotive, originally built by Baldwin in 1907 for the Atlanta, Birmingham and Atlantic Railway. It subsequently went through several ownership changes in both the steam era and the preservation era before it eventually found its way to the Wilmington and Western Railroad in 1973. Presently, No. 58 is used to operate tourist trains between Wilmington and Hockessin, Delaware.
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