The Pennsylvania Railroad, legal name The Pennsylvania Railroad Company, also known as the "Pennsy", was an American Class I railroad that was established in 1846 and headquartered in Philadelphia. It was named for the commonwealth in which it was established. At its peak in 1882, the Pennsylvania Railroad was the largest railroad, the largest transportation enterprise, and the largest corporation in the world.
The American Locomotive Company was an American manufacturer of locomotives, diesel generators, steel, and tanks that operated from 1901 to 1969.
Under the Whyte notation for the classification of steam locomotives, 4-6-2 represents the wheel arrangement of four leading wheels on two axles, six powered and coupled driving wheels on three axles and two trailing wheels on one axle. The 4-6-2 locomotive became almost globally known as a Pacific type after a New Zealand locomotive that was shipped across the Pacific Ocean.
The New York Central Railroad (NYC) called the 4-8-2 type of steam locomotive the Mohawk type. It was known as the Mountain type on other roads, but the New York Central did not see the name as fitting on its famous Water Level Route. Instead, it picked the name of one of those rivers its rails followed, the Mohawk River, to name its newest type of locomotive. Despite the more common name, the 4-8-2 was actually suited in many ways more to flatland running than slow mountain slogging, with its 4-wheel leading truck for stability at speed. However, the L1s and L2s were unstable at higher speeds due to the lack of effective cross-balancing, making the 4-wheel leading truck simply a better distributor of the locomotives weight; the L1s and L2s were consequently limited to 60 mph (97 km/h), though this issue was resolved for the L3s and L4s using data gathered from two experimental L-2s.
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.
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.
Locomotive classification on the Pennsylvania Railroad took several forms. Early on, steam locomotives were given single-letter classes. As the 26 letters were quickly assigned, that scheme was abandoned for a more complex system. This was used for all of the PRR's steam locomotives, and — with the exception of the final type bought — all electric locomotives also used this scheme.
The PRR S1 class steam locomotive was a single experimental duplex locomotive of the Pennsylvania Railroad. It was designed to demonstrate the advantages of duplex drives espoused by Baldwin Chief Engineer Ralph P. Johnson. It was the longest and heaviest rigid frame reciprocating steam locomotive that was ever built. The streamlined Art Deco styled shell of the locomotive was designed by Raymond Loewy.
The Timken Roller Bearing Company was one of the first to introduce roller bearings for railroad cars. Railroad cars owned and operated by the Atchison, Topeka and Santa Fe Railway were some of the first to use roller bearings rather than "oil waste journal" boxes. Henry Timken, a German immigrant, invented an improved bearing and founded the company in 1899. It was later renamed The Timken Company.
The GS-5 was a class of streamlined 4-8-4 "Northern" type steam locomotive operated by the Southern Pacific Railroad (SP) from 1942 to 1958. A total of two were built by the Lima Locomotive Works, numbered 4458 and 4459. GS stands for "Golden State" or "General Service."
The ALCO FA was a family of B-B diesel locomotives designed to haul freight trains. The locomotives were built by a partnership of ALCO and General Electric in Schenectady, New York, between January 1946 and May 1959. Designed by General Electric's Ray Patten, they were of a cab unit design; both cab-equipped lead FA and cabless booster FB models were built. A dual passenger-freight version, the FPA/FPB, was also offered. It was equipped with a steam generator for heating passenger cars.
Spokane, Portland & Seattle 700 is the oldest and only surviving example of the class "E-1" 4-8-4 "Northern" type steam locomotive and the only surviving "original" Spokane, Portland and Seattle Railway steam locomotive. It was built by the Baldwin Locomotive Works in May 1938. Nearly identical to the class "A-3" Northerns built for Northern Pacific Railway, it burns oil instead of coal.
New York Central 3001 is a 4-8-2 "Mohawk" (Mountain)-type steam locomotive built in 1940 by the American Locomotive Company (ALCO) for the New York Central Railroad. Normally known as "Mountain" types, New York Central 4-8-2 steam locomotives were dubbed "Mohawk" types after the Mohawk River, which the New York Central followed. Built for dual service work, the 3001 was used heavily for freight and passenger trains until being retired in 1957. The locomotive is currently on static display at the National New York Central Railroad Museum in Elkhart, Indiana. It is currently the largest modern New York Central steam locomotive still in existence and is one of two surviving New York Central Mohawks; the other, No. 2933, which was currently on display at the National Museum of Transportation in St. Louis, Missouri.
The Pennsylvania Railroad G5 is a class of 4-6-0 steam locomotives built by the PRR's Juniata Shops in the mid-late 1920s. It was designed for passenger trains, particularly on commuter lines, and became a fixture on suburban railroads until the mid-1950s. The G5 was the largest and most powerful 4-6-0 locomotive, except for a single Southern Pacific 4-6-0 that outweighed it by 5,500 lb.
The Reading T-1 was a class of 4-8-4 "Northern" type steam locomotives owned by the Reading Company. They were rebuilt from 30 "I-10sa" class 2-8-0 "Consolidation" type locomotives between 1945 and 1947. Out of the 30 rebuilt, 4 survive in preservation today, those being numbers 2100, 2101, 2102 and 2124.
The Pennsylvania Railroad's class K29s comprised a single experimental 4-6-2 "Pacific" type steam locomotive. Constructed by Alco-Schenectady, it was given road number 3395. Although only one demonstrator was constructed, the K29s would become the basis for the highly successful K4s Pacifics and L1s Mikados. The lone example spent most of its life on the PRR's Pittsburgh division main line and was retired around 1929.
Great Northern 2584 is a 4-8-4 "Northern" type steam locomotive built by the Baldwin Locomotive Works in Philadelphia, Pennsylvania in March 1930 for the Great Northern Railway (GN) as a member of the S-2 class.
The Great Northern S-2 was a class of 14 4-8-4 "Northern" type steam locomotives built by the Baldwin Locomotive Works in 1930 and operated by the Great Northern Railway until the late 1950s.
The Milwaukee Road S3 Class was a class of 10 4-8-4 "Northern" type steam locomotives built by the American Locomotive Company in 1944 and operated by the Milwaukee Road until the mid 1950s. The locomotives saw service in pulling freight and passenger trains throughout the Milwaukee Road.
The Delaware & Hudson K-62 Class was a class of fifteen 4-8-4 steam locomotives built by the American Locomotive Company's Schenectady Works in 1943. They were intended as dual-service locomotives, hauling both freight and passenger trains until dieselization in 1953.
