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TT scale (from "table top") is a model railroading scale at 1:120 scale with a track gauge of 12 mm between the rails. It is placed between HO scale (1:87) and N scale (1:160). Its original purpose, as the name suggests, was to make a train set small enough to assemble and operate on a tabletop.
The scales used include the general European modelling range of Z, N, TT, H0, 0 and also the large model engineering gauges of I to X, including 3 + 1 ⁄ 2, 5, 7 + 1 ⁄ 4 and 10 + 1 ⁄ 4-inch gauge. As 00 is a particularly British scale, it is not included within this pan-European standard. However the predominantly US imperial-based S scale ...
Narrow-gauge modelling of 3 ft (914 mm) prototypes on 12mm gauge (the same as TT scale) track. EM gauge: 1:76.2: 18.2 mm EM gauge was an earlier attempt in the 1950s to improve the inaccuracies of OO gauge, with wider, more accurate track at 18 mm (0.709 in) between the rails, but still
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 ...
British OO standards operate on track significantly too narrow. The 4 mm/1 foot scale on a 16.5 mm (0.65 in) gauge corresponds to a track gauge of 4 ft 1 + 1 ⁄ 2 in (1,257 mm), 7 inches or 178 millimetres (undersized). 16.5 mm (0.65 in) gauge corresponds to 4 ft 8 + 1 ⁄ 2 in (1,435 mm) standard gauge in H0 (half-0) 3.5 mm/1 foot or 1:87.1 ...
OO gauge or OO scale (also, 00 gauge and 00 scale) is the most popular standard gauge model railway standard in the United Kingdom, [1] outside of which it is virtually unknown. OO gauge is one of several 4 mm-scale standards (4 mm to 1 ft (304.8 mm), or 1:76.2), and the only one to be marketed by major manufacturers.
The letter m stands for metre prototype gauge with a track width of 1000 mm. It runs on 12 mm ( 0.472 in ) TT scale tracks. Modern H0m trains run on realistic-looking two-rail track, which is powered by direct current (varying the voltage applied to the rails to change the speed , and polarity to change direction), or by Digital Command Control ...
Kato Precision Railroad Models (関水金属株式会社, Sekisui Kinzoku Kabushikigaisha) is a Japanese manufacturer of model railroad equipment in N and HO scales. Founded in 1957, [1] the Tokyo-based company manufactures models based on Japanese prototypes (such as the Shinkansen bullet train and Cape gauge trains and locomotives) for the Japanese market, North American prototypes for the ...