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  2. Z scale - Wikipedia

    en.wikipedia.org/wiki/Z_scale

    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 ...

  3. List of narrow-gauge model railway scales - Wikipedia

    en.wikipedia.org/wiki/List_of_narrow-gauge_model...

    Thus the scale and approximate prototype gauge are represented, with the model gauge used (9 mm for H0e gauge; 6.5 mm for H0f gauge) being implied. [2] 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 ...

  4. Standard normal table - Wikipedia

    en.wikipedia.org/wiki/Standard_normal_table

    Z tables use at least three different conventions: Cumulative from mean gives a probability that a statistic is between 0 (mean) and Z. Example: Prob(0 ≤ Z ≤ 0.69) = 0.2549. Cumulative gives a probability that a statistic is less than Z. This equates to the area of the distribution below Z. Example: Prob(Z ≤ 0.69) = 0.7549. Complementary ...

  5. AZL - Wikipedia

    en.wikipedia.org/wiki/AZL

    Federal Customs Administration (AZL) of Switzerland, see Swiss Border Guard; American Z Line (model trains), a company making Z-scale model rail, see Z scale 'Azl (Arabic: عزل) the withdrawal method under Islamic jurisprudence; Anti Zealot League (moderate right wing) activists against extreme zealous protestors

  6. ZZ scale - Wikipedia

    en.wikipedia.org/wiki/ZZ_scale

    However the field of miniature war games has a large selection of buildings, trucks and other accessories at 1:285 scale and 1:300. Several suppliers make these in painted and unpainted form, and at several levels of quality. Until the 2006 announcement of T scale, ZZ scale was the smallest commercially available scale for model railroads.

  7. Ten and a quarter inch gauge - Wikipedia

    en.wikipedia.org/wiki/Ten_and_a_quarter_inch_gauge

    Ten and a quarter inch gauge (or X scale) (10 + 1 ⁄ 4 in / 260 mm) is a large modelling scale, generally only used for ridable miniature railways. Model railways at this scale normally confine the scale modelling aspects to the reproduction of the locomotive and with steam locomotives the accompanying tender .

  8. Orthogonal coordinates - Wikipedia

    en.wikipedia.org/wiki/Orthogonal_coordinates

    A conformal map acting on a rectangular grid. Note that the orthogonality of the curved grid is retained. While vector operations and physical laws are normally easiest to derive in Cartesian coordinates, non-Cartesian orthogonal coordinates are often used instead for the solution of various problems, especially boundary value problems, such as those arising in field theories of quantum ...

  9. Talk:Z scale - Wikipedia

    en.wikipedia.org/wiki/Talk:Z_scale

    In late 60s Märklin was experimenting with N scale products, which were never offered commercially. Instead, they started to develop a completely new model railway scale 1:220. Prior to 1972 there may have been some prototypes of z-scale products, but seeing them publicly in stores 3-4 years earlier sounds a bit unbelievable.