2-8-4 lines. The JNR rebuilt a total of 104 locomotives to the 2-8-4 wheel arrangement from its older 2-8-2 Mikado classes, the Class D50, Class D51 and Class D52. Some of these locomotives survived in service up to the end of steam traction on the JNR in 1974. In 1951, Mexico’s "Ferrocarriles Nacionales de México" (N de M) bought five 2-8-4 locomotives, built by Baldwin Locomotive Works in 1940, from Norfolk Southern Railway in the United States of America (USA), where they had become redundant due to dieselisation. Before their arrival in Mexico, all five went through a complete major overhaul
2-8-8-8-8-8-2 2-8-8-8-8-8-2 Under the Whyte notation for the classification of steam locomotives, a 2-8-8-8-8-8-2 has two leading wheels, five sets of eight driving wheels, and two trailing wheels. Because of its length, such a locomotive must be an articulated locomotive. It is not longer than a normal articulated; the fourth and fifth sets of drivers are located under the tender. Other equivalent classifications are: UIC classification: 1-D-D-D-D-D-1 (also known as German classification and Italian classification) AAR classification: 1-D-D-D-D-D-1 French classification: 140+040+040+040+041 Turkish classification: 45+44+44+44+45 Swiss classification: 4/5+4/4+4/4+4/4+4/5 The equivalent UIC classification is to be refined to (1'D)DDD(D1'). The Baldwin Locomotive Works