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  2. 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 ...

  3. List of rail transport modelling scale standards - Wikipedia

    en.wikipedia.org/wiki/List_of_rail_transport...

    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.

  4. Rail transport modelling scales - Wikipedia

    en.wikipedia.org/.../Rail_transport_modelling_scales

    Narrow-gauge models in this gauge can be as large as 1:3 scale. 5-inch Live steam: 1:12: 127 mm or 121 mm Ridable, outdoor gauge. The gauge is 5 in (127 mm) in Europe, but 4 + 3 ⁄ 4 in (121 mm) in US and Canada. For standard gauge prototypes at 5 inch, the correct scale is 1 1 ⁄ 16 inch per foot or approximately 1:11.3. Alternatively 1.1/8 ...

  5. 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.

  6. 6.5 mm - Wikipedia

    en.wikipedia.org/wiki/6.5_mm

    Z gauge, 1:220 scale with rails 6.5 mm apart, representing standard gauge; Nn3 gauge, 1:160 scale with rails 6.5 mm apart, representing metre/3-foot gauge; H0f gauge, 1:87 scale with rails 6.5 mm apart, representing narrow gauge

  7. List of humorous units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_humorous_units_of...

    The nanoacre is a unit of real estate on a very-large-scale integration (VLSI) chip equal to 0.00627264 sq in (4.0468564224 mm 2) or the area of a square of side length 0.0792 in (2.01168 mm). VLSI nanoacres have similar total costs to acres in Silicon Valley .

  8. Human penis size - Wikipedia

    en.wikipedia.org/wiki/Human_penis_size

    One study analysing the self-reported Kinsey data set found that the average penis of a homosexual man was larger than the average penis of their heterosexual counterparts (6.32 inches [16.05 cm] in length amongst gay men versus 5.99 in [15.21 cm] in heterosexuals, and 4.95 inches [12.57 cm] circumference amongst gay men versus 4.80 in [12.19 ...

  9. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    The French scale measures the outer diameter of the catheter, not the size of the internal drainage channel (inner diameter). For instance, a two-way catheter of 20 Fr and a three-way catheter of 20 Fr have the same outer diameter, but the three-way catheter has an additional channel for irrigation, reducing the size of its drainage channel.