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On30 (also called On2 1 ⁄ 2, O16.5 and Oe) gauge is the modelling of narrow gauge railways in O scale on HO (16.5 mm / 0.65 in) gauge track in 1:48 scale ratio by American and Australian model railroaders, in 1:43.5 scale ratio by British and French model railroaders and 1:45 by Continental European model railroaders (excluding France).
In terms of model railway operation, gauge 3 is the largest (standard gauge) scenic railway modelling scale, using a scale of 13.5 mm to the foot. The Gauge '3' Society represents this aspect of 2 + 1 ⁄ 2-inch gauge railway modelling with both electric and live steam operation. Gauge '3' corresponds to NEM II scale, also known as "Spur II" in ...
O-scale models of 3 ft 6 in narrow-gauge prototypes running on 24 mm gauge track. Virtually unknown outside Japan and Taiwan On2: 1:48: 12.7 mm O-scale models of 2 ft narrow-gauge prototypes running on 1 ⁄ 2 in (12.7 mm) gauge track. On30 gauge: 1:48: 16.5 mm Narrow gauge O-scale models running on HO gauge track.
Railways with a track gauge between 500 mm (19 + 3 ⁄ 4 in) and 4 ft 8 + 1 ⁄ 2 in (1,435 mm) standard gauge. Diamond crossing dual gauge double line narrow-gauge and standard-gauge. Narrow gauge track.
Whilst the scale of structures can be considered the same in an O Scale layout regardless of track gauge (ignoring forced scale for purposes of perspective), On3 (3 ft (914 mm)), On30 (2 ft 6 in (762 mm)) or On2 (2 ft) prototype modelling permits a greater level of model detail and more appropriate scale operation of narrow gauge railway ...
The term HOn30 (and sometimes HOn2½) is generally used when modelling American prototypes while H0e is used for European prototypes. In Britain, the term OO9 is used. [1] All these terms refer to models of narrow-gauge railways built to the world's most popular model railway scale of HO (1:87) but using a track gauge of 9 mm (0.354 in)—the gauge used for N scale models of standard-gauge ...
mmModelling railways with a gauge of 2 ft 6 in (762 mm), 750 mm (2 ft 5 + 1 ⁄ 2 in), 760 mm (2 ft 5 + 15 ⁄ 16 in) and 800 mm (2 ft 7 + 1 ⁄ 2 in) and pages relating to their modelling. Pages in category "30 inch railways and modelling"
The gauge was known as "Texas gauge" while required by Texas law until 1875, [4] and used by the New Orleans, Opelousas and Great Western Railroad (NOO&GW) until 1872, and by the Texas and New Orleans Railroad until 1876. The New England railways were similarly standard-gauged in the 1870s.