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O scale (or O gauge) is a scale commonly used for toy trains and rail transport modelling.Introduced by German toy manufacturer Märklin around 1900, by the 1930s three-rail alternating current O gauge was the most common model railroad scale in the United States and remained so until the early 1960s.
This scale is today the most popular modelling scale in the UK, although it once had some following in the US (on 19 mm / 0.748 in gauge track) before World War II. 00 or "Double-Oh", together with EM gauge and P4 standards are all to 4 mm scale as the scale is the same, but the track standards are incompatible. 00 uses the same track as HO (16 ...
This gauge is represented by the EM Society (in full, Eighteen Millimetre Society). 00 track (16.5 mm) is the wrong gauge for 1:76 scale, but use of an 18.2 mm (0.717 in) gauge track is accepted as the most popular compromise towards scale dimensions without having to make significant modifications to ready-to-run models. Has a track gauge ...
The first 0-10-0 in the United States was built to provide service on Madison Hill which, at 5.89%, has the steepest standard gauge grade in the country. It was a tank locomotive, designed in 1868 by Reuben Wells for the Jeffersonville, Madison and Indianapolis Railroad and named for its designer.
The OO track gauge of 16.5 mm (0.65 in) (same as the 1:87 HO scale) corresponds to prototypical gauge of 4 ft 1 + 1 ⁄ 2 in, rather than 4 ft 8 + 1 ⁄ 2 in standard gauge. However, since the 1960s, other gauges in the same scale have arisen—18.2 mm ( EM ) and 18.83 mm ( Scalefour )—to reflect the desire of some modellers for greater scale ...
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Although the British scale for 0 gauge was first used for model cars made of rectilinear and circular parts, it was the origin of the European scale for cast or injection molded model cars. MOROP's specification of 1:45 scale for European 0 does not alter the series of cars in 1:43 scale, as it has the widest distribution in the world.
16 mm to 1 foot or 1:19.05 is a popular scale of model railway in the UK which represents narrow gauge prototypes. [1] The most common gauge for such railways is 32 mm (1.26 in), representing 2 ft (610 mm) gauge prototypes.