The 4-6-2 type, or "Pacific", as the class was known, was the predominant steam passenger locomotive during the first five decades of the 20th century. Between 1902 (when the first North American locomotives of this wheel arrangement were produced) and 1930, about 6800 locomotives of the type were built for US and Canadian service.

Five locomotives built by Lima in 1913 introduced mechanical stokers to the Erie Pacific. The firebox heating surface included 28 sq ft (2.6 sq m) of arch tubes. They were Lima's first rod-driven road locomotives (as opposed to switchers, e.g.) to be ordered by a trunk line.

The PRR inherited twelve "Pacific" locomotives when the railroad absorbed the Vandalia Line, in 1917. These ALCO built 4-6-2 locomotives weighed 263,000 pounds and had 80" drivers, 24 x 26 cylinders, a 200 psi boiler pressure and they exerted 31,824 lbs of tractive effort.

The Chesapeake and Ohio was among the first railroads to test the 4-6-2 wheel arangement (around 1902) and had at least one 4-6-2 before the Missouri Pacific (from which the wheel arrangement gots its name).

The Atlantic Coast Line took delivery of 15 "Pacific" type locomotives, in 1911, from the Baldwin Locomotive Works. these locomotives were given road numbers 260 through 274 and were designated as Class P. They had 73" diameter driver and were designed to be main line passenger motive power.

Aug 3, 2023 · The Central Railroad of New Jersey based their pacific design on the Reading's G1s, but with more weight, larger cylinders, and slightly smaller drivers. This resemblance to Reading engines was to decrease as time went on.

Atchison, Topeka & Santa Fe 4-6-2 "Pacific" Locomotives in the USA The 1200 Class was built with long driver centers specifically to take the 79" drivers from 1000/1050 Class Prairies. The 2-6-2 types were built for passenger service, but the two wheel pony trucks were found to provide inadequate stability, so the decision was made to convert ...

One of three three-cylinder Pacific locomotive designs built by Alco in 1925. (The others were Rock Island's P-46 class- Locobase 142 -and L&N's #295-- Locobase 149 .) The MP was the heaviest, had more small tubes, and had a slightly higher superheat/CHS ratio.

These locomotives (road numbers 1300 through 1349) had 24 x 28 cylinders, a larger boiler, but the same 73" diameter drivers as the I-1s. These new Class I-2 "Pacifics" could exert 37,558 lbs of tractive effort.

Data from "Extensive Order for New Locomotives for the Northern Pacific Railway Company," Railway and Locomotive Engineering, Vol XXXV, No. 2 (February 1922), pp. 35-36. Data confirmed by locomotive diagrams from 1900 hosted on [ ] (7 Feb 2004).