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Z scale is one of the smallest commercially available model railway scales (1:220), with a track gauge of 6.5 mm / 0.256 in. Introduced by Märklin in 1972, Z scale trains operate on 0–10 volts DC and offer the same operating characteristics as all other two-rail, direct-current, analog model railways. Locomotives can be fitted with digital ...
Japanese manufacturers are increasingly involved in Z scale, with Rokuhan Archived 2020-06-10 at the Wayback Machine producing what is considered by some the best Z track in the world. ZZ scale: 1:300: 4.8 mm Introduced by Bandai, ZZ scale was very briefly the smallest commercially available model railway available.
Scale is the model's measurement as a proportion to the original, while gauge is the measurement between the rails. The size of engines depends on the scale and can vary from 700 mm (27.6 in) tall for the largest rideable live steam scales such as 1:4, down to matchbox size for the smallest: Z-scale (1:220) or T scale (1:450).
When H0 scale was being introduced, the motors available were too large [4] to fit in scale-sized bodies and so as a compromise the scale was increased from 3.5 mm to 4 mm to the foot, but the gauge was not changed so other elements could be shared. For 00 therefore the track is about 12.5% narrower than it should be for the scale used.
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 ...
Märklin followed with O gauge (by some accounts as early as 1895 or as late as 1901), HO scale in 1935, and the diminutive Z scale, 1:220, in 1972 — smallest in the world for decades — under the name Mini-Club (the scale of Z was assigned after the product line was introduced).