Invention and Engineering

4-2-2

Under the Whyte notation for the classification of steam locomotives, 4-2-2 represents the wheel arrangement of four leading wheels on two axles, two powered driving wheels on one axle, and two trailing wheels on one axle. Other equivalent classifications are: UIC classification: 2A1 French classification: 211 Turkish classification: 14 Swiss classification: 1/4 Like other steam locomotive types with single pairs of driving wheels, they were also known as singles.

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See also

• ▸DU spectrophotometer
• ▸Cyclone Mark V Engine
• ▸Anti-submarine warfare

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