4-4-6-4 (original) (raw)

A 4-4-6-4, in the Whyte notation for the classification of steam locomotives by wheel arrangement, is one that has four leading wheels followed by four coupled driving wheels, a second set of six coupled driving wheels and four trailing wheels. Other equivalent classifications are:UIC classification: 2BC2 (also known as German classification and Italian classification)French classification: 2232Turkish classification: 2435Swiss classification: 2/4+3/5 up to the early 1920s, later 5/9