A Mallet locomotive is a type of compound articulated steam locomotive, invented by the Swiss engineer Anatole Mallet (1837–1919).
The Union Pacific Big Boy is a type of simple articulated 4-8-8-4 steam locomotive manufactured by the American Locomotive Company (ALCO) between 1941 and 1944 and operated by the Union Pacific Railroad in revenue service until 1962.
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.
A 2-8-8-4 steam locomotive, under the Whyte notation, has two leading wheels, two sets of eight driving wheels, and a four-wheel trailing truck. The type was generally named the Yellowstone, a name given it by the first owner, the Northern Pacific Railway, whose lines ran near Yellowstone National Park. Seventy-two Yellowstone-type locomotives were built for four U.S. railroads.
Invented in 1918 by Howard L. Ingersoll, assistant to the President of the New York Central Railroad, the locomotive booster for steam locomotives is a small two-cylinder steam engine back-gear-connected to the trailing truck axle on the locomotive or one of the trucks on the tender. A rocking idler gear permits it to be put into operation by the driver (engineer). A geared booster engine drives one axle only and can be non-reversible, with one idler gear, or reversible, with two idler gears. There were variations built by the Franklin company which utilized side rods to transmit tractive force to all axles of the booster truck. These rod boosters were predominately used on the leading truck of the tender, though there is an example of a Lehigh Valley 4-8-4 using it as a trailing tender truck.
Lima Locomotive Works was an American firm that manufactured railroad locomotives from the 1870s through the 1950s. The company took the most distinctive part of its name from its main shop's location in Lima, Ohio. The shops were located between the Erie Railroad main line, the Baltimore & Ohio's Cincinnati-Toledo main line and the Nickel Plate Road main line and shops.
In the Whyte notation for the classification of steam locomotive wheel arrangement, a 2-6-6-4 is a locomotive with a two-wheel leading truck, two sets of six driving wheels, and a four-wheel trailing truck. All 2-6-6-4s are simple articulated locomotives.
The Pennsylvania Railroad's S2 class was a steam turbine locomotive designed and built in a collaborative effort by Baldwin Locomotive Works and Westinghouse Electric & Manufacturing Company, as an attempt to prolong the dominance of the steam locomotive by adapting technology that had been widely accepted in the marine industry. One was built, #6200, delivered in September 1944. The S2 was the sole example of the 6-8-6 wheel arrangement in the Whyte notation, with a six-wheel leading truck, eight driving wheels, and a six-wheel trailing truck. The S2 used a direct-drive steam turbine provided by the Westinghouse Electric & Manufacturing Company, geared to the center pair of axles with the outer two axles connected by side rods; the fixed gear ratio was 18.5:1. Such design was to prevent energy loss and S2 achieved a mechanical efficiency of 97% which means only 3% of steam energy was lost within the propulsion equipment. The disadvantage of a direct-drive steam turbine was that the turbine could not operate at optimal speeds over the locomotive's entire speed range. The S2 was the largest, heaviest and fastest direct-drive turbine locomotive design ever built.
Chesapeake & Ohio 614 is a class "J-3-A" 4-8-4 "Greenbrier" (Northern) type steam locomotive built in June 1948 by the Lima Locomotive Works in Lima, Ohio for the Chesapeake and Ohio Railway (C&O) as a member of the J-3-A class. As one of the last commercially built steam locomotives in the United States, the locomotive was built with the primary purpose of hauling long, heavy, high speed express passenger trains for the Chesapeake & Ohio Railway such as the George Washington and the Fast Flying Virginian. Retired from active service in the late 1950s, the 614 was preserved and placed on display at the B&O Railroad Museum in Baltimore, Maryland. Between 1979 and 1980, restoration work on the locomotive to operating condition took place and it was used for extensive mainline excursion service from the early 1980s until the late 1990s. Since 2011, the locomotive has been on display at the C&O Railway Heritage Center in Clifton Forge, Virginia.
The USRA 2-6-6-2 is a standardized design of 2-6-6-2 Mallet locomotives developed by the United States Railroad Administration during World War I.
The R class was an express passenger steam locomotive that ran on Australia's Victorian Railways (VR) from 1951 to 1974. A long overdue replacement for the 1907-era A2 class 4-6-0, their development and construction was repeatedly delayed due to financial constraints caused by the Great Depression and later the manpower and materials shortages of World War II and the immediate postwar period.
The Fort Eustis Military Railroad is an intra-plant United States Army rail transportation system existing entirely within the post boundaries of the United States Army Transportation Center and Fort Eustis (USATCFE), Fort Eustis, Virginia. It has served to provide railroad operation and maintenance training to the US Army and to carry out selected material movement missions both within the post and in interchange with the US national railroad system via a junction at Lee Hall, Virginia. It consists of 31 miles (50 km) of track broken into three subdivisions with numerous sidings, spurs, stations and facilities.
The Chesapeake and Ohio class M-1 was a fleet of three steam turbine locomotives built by the Baldwin Locomotive Works for the Chesapeake and Ohio Railway in 1947–1948 for service on the Chessie streamliner. As diesel locomotives became more prevalent following World War II, the C&O was one of several railroads that were reluctant to abandon coal as a fuel source, and saw steam turbine technology as a possible alternative to diesel. At the time of its construction it was the longest single-unit locomotive in the world.
The Chesapeake and Ohio H-8 was a class of 60 2-6-6-6 steam locomotives built by the Lima Locomotive Works in Lima, Ohio between 1941 and 1948, operating until the mid 1950s. The locomotives were among the most powerful steam locomotives ever built and hauled fast, heavy freight trains for the railroad. Only two units were preserved; Nos. 1601 and 1604.
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 & Ishpeming Railroad (LS&I) as No. 18. It was renumbered to 34 in 1925.
The Louisville and Nashville M-1 was a class of forty-two 2-8-4 steam locomotives built during and after World War II as dual-service locomotives. They were nicknamed "Big Emmas" by crews and were built in three batches between 1942 and 1949.
The Chesapeake and Ohio Greenbrier was a class of 12 4-8-4 "Greenbrier" type steam locomotives built by the Lima Locomotive Works between 1935 and 1948 and operated by the C&O. Like a handful of railroads, the C&O didn't name their 4-8-4s "Northerns", and instead went with the name "Greenbrier" after the Greenbrier Hotel in White Sulphur Springs, West Virginia, a major resort on the C&O mainline.
The Chesapeake & Ohio Railway's Classes J-1 and J-2 were two classes of 4-8-2 steam locomotives introduced on the Chesapeake & Ohio for hauling heavy passenger trains over the Allegheny Mountains. The J-1s were the first 4-8-2s in the United States and earned the wheel arrangement the name of "Mountains" after the C&O's Mountain Divisions over which they would traverse.
The Chesapeake and Ohio T-1 was a class of forty 2-10-4 steam locomotives built by the Lima Locomotive Works in Lima, Ohio in 1930 and operated until the early 1950s.
