2-8-8-4

Common card · No. 409186

A 2-8-8-4 steam locomotive, under the Whyte notation, has two leading wheels, two sets of eight driving wheels, and a four-wheel trailing truck. The type was generally named the Yellowstone, a name given it by the first owner, the Northern Pacific Railway, whose lines ran near Yellowstone National Park. Seventy-two Yellowstone-type locomotives were built for four U.S. railroads. Other equivalent classifications are: UIC classification: 1DD2 (also known as German classification and Italian classification) French classification: 140+042 Turkish classification: 45+46 Swiss classification: 4/5+4/6 Russian classification: 1-4-0+0-4-2 The equivalent UIC classification is, refined for simple articulated locomotives, (1′D)D2 A similar wheel arrangement exist for Garratt locomotive but is referred to as 2-8-0+0-8-4 since both engine units swivel A locomotive of this length must be an articulated locomotive. All Yellowstones had fairly small drivers of 63 to 64 inches (1.60 to 1.63 m). (For greater...

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