2-4-4-2

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• …Steam locomotive wheel configuration

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  4-6-2

  4-6-2, in the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of four leading wheels on two axles (usually in a leading truck), six powered and coupled driving wheels on three axles, and two trailing wheels on one axle (usually in a trailing truck)....
• 

  4-8-2

  Under the Whyte notation for the classification of steam locomotives, 4-8-2 represents the wheel arrangement of four leading wheels on two axles (usually in a leading truck), eight powered and coupled driving wheels on four axles, and two trailing wheels on one axle (usually in a trailing truck)....
• 

  2-10-4

  Under the Whyte notation for the classification of steam locomotives, a 2-10-4 locomotive has two leading wheels, ten driving wheels (in other words, five driven axles), and four trailing wheels. These were referred to as the "Texas" type in most of the United States, the "Colorado" type on the...
• 

  4-8-8-4

  In the Whyte notation for the classification of steam locomotives by wheel arrangement, a 4-8-8-4 is a locomotive with a four-wheel leading truck, two sets of eight driving wheels, and a four-wheel trailing truck. Other equivalent classifications are: UIC classification: 2DD2 (also known as German...
• 

  0-4-0

  Under the Whyte notation for the classification of steam locomotives, 0-4-0 represents one of the simplest possible types, that with two axles and four coupled wheels, all of which are driven. In normal circumstances, the wheels on each end of the axles are connected with coupling rods to form a...
• 

  0-6-0

  Under the Whyte notation for the classification of steam locomotives, 0-6-0 represents the wheel arrangement of no leading wheels, six powered and coupled driving wheels on three axles, and no trailing wheels. This was the most common wheel arrangement used on both tender and tank locomotives, in...
• 

  4-6-4

  Under the Whyte notation for the classification of steam locomotives, 4-6-4 represents the wheel arrangement of four leading wheels on two axles (usually in a leading truck), six powered and coupled driving wheels on three axles, and four trailing wheels on two axles (usually in a trailing truck)....
• 

  4-8-4

  Under the Whyte notation classification of steam locomotives, 4-8-4 represents the wheel arrangement of four leading wheels on two axles (usually in a leading truck), eight powered and coupled driving wheels on four axles, and four trailing wheels on two axles (usually in a trailing truck). Other...
• 

  2-10-0

  Under the Whyte notation for the classification of steam locomotives, 2-10-0 represents the wheel arrangement of two leading wheels on one axle, ten powered and coupled driving wheels on five axles, and no trailing wheels. This arrangement was often named Decapod, especially in the United States,...
• 

  2-10-2

  Under the Whyte notation for the classification of steam locomotives, 2-10-2 represents the wheel arrangement of two leading wheels on one axle, usually in a leading truck, ten powered and coupled driving wheels on five axles, and two trailing wheels on one axle, usually in a trailing truck. In the...