Gauge 3 Railways

Gauge 3
Gauge 3 model of a British Rail Class 14 locomotive by ALD Models
Scale1⁄2 in (12.7 mm) to 1 ft (305 mm)
Scale ratio1:22.5 (Europe), 1:24 (UK)
Model gauge2+1⁄2 in (64 mm)
Prototype gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge

Gauge 3, also known as 3 gauge or 2.5 inch gauge, is a model railway standard that uses track measuring 2+1⁄2 in (64 mm). Originally defined by the Model Railway and Locomotive Club in 1909, Gauge 3 represents standard gauge (1,435 mm / 4 ft 8½ in) railways at a scale of 1:22.5 (European) or 1:24 (British), making it one of the largest standard-gauge model railway scales in common use.

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