Baltimore and Ohio Class N-1
Encyclopedia
The Baltimore and Ohio Railroad
's sole Class N-1 steam locomotive
, #5600 George H. Emerson, was the first duplex locomotive
and the first 4-4-4-4
locomotive ever built. It was designed and built by the railroad's own shops in 1937
. The rear set of cylinders were placed beside the firebox. This allowed the locomotive's wheelbase to remain the same. The space beside the firebox was hot and dirty, which caused premature cylinder wear, and the placement of the cylinders limited the size of the firebox. These same problems occurred on the PRR Q1
, which also placed the rear cylinders by the firebox.
Baltimore and Ohio Railroad
The Baltimore and Ohio Railroad was one of the oldest railroads in the United States and the first common carrier railroad. It came into being mostly because the city of Baltimore wanted to compete with the newly constructed Erie Canal and another canal being proposed by Pennsylvania, which...
's sole Class N-1 steam locomotive
Steam locomotive
A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...
, #5600 George H. Emerson, was the first duplex locomotive
Duplex locomotive
A duplex locomotive is a steam locomotive that divides the driving force on its wheels by using two pairs of cylinders rigidly mounted to a single locomotive frame; it is not an articulated locomotive...
and the first 4-4-4-4
4-4-4-4
A 4-4-4-4 steam locomotive, in the Whyte notation for describing locomotive wheel arrangements, has a four-wheel leading truck, two sets of four driving wheels, and a four-wheel trailing truck.Other equivalent classifications are:...
locomotive ever built. It was designed and built by the railroad's own shops in 1937
1937 in rail transport
-January events:* January – Electro-Motive Corporation introduces the EMC E2.* January 18 – The Østfold Line in Norway takes electric traction into use between Ljan and Kolbotn.-March events:...
. The rear set of cylinders were placed beside the firebox. This allowed the locomotive's wheelbase to remain the same. The space beside the firebox was hot and dirty, which caused premature cylinder wear, and the placement of the cylinders limited the size of the firebox. These same problems occurred on the PRR Q1
PRR Q1
The Pennsylvania Railroad's class Q1 comprised a single experimental steam locomotive for freight service, #6130, built in March 1942. A duplex locomotive, it had a wheel arrangement of 4-6-4-4, comprising a four-wheel leading truck, two sets of driving wheels in a rigid locomotive frame, and a...
, which also placed the rear cylinders by the firebox.