4-2-0
Locomotive wheel arrangement / From Wikipedia, the free encyclopedia
For the Kottonmouth Kings song, see Rollin' Stoned. For other uses, see 420 (disambiguation).
Under the Whyte notation for the classification of steam locomotives, 4-2-0 represents the wheel arrangement of four leading wheels on two axles, two powered driving wheels on one axle and no trailing wheels. This type of locomotive is often called a Jervis type, the name of the original designer.
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