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  2. HOn3½ gauge - Wikipedia

    en.wikipedia.org/wiki/HOn3½_gauge

    Sn3½ is also used to represent 3 ft 6 in (1,067 mm), as the gauge is the same as HO scale. HOm uses the same 12mm gauge track to represent metre-gauge (3ft3.37in) railways. HOn3 uses 10.5 mm ( 0.413 in ) gauge to represent 3 ft ( 914 mm ) gauge railways H0e /HOn30 uses 9 mm ( 0.354 in ) gauge to represent railway with gauges of about 750 ...

  3. Template:HO scale - Wikipedia

    en.wikipedia.org/wiki/Template:HO_scale

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  4. Scale ruler - Wikipedia

    en.wikipedia.org/wiki/Scale_ruler

    An architect's scale is a specialized ruler designed to facilitate the drafting and measuring of architectural drawings, such as floor plans and Multi-view orthographic projections. Because the scale of such drawings is often smaller than life-size, an architect's scale features multiple units of length and proportional length increments. [1]

  5. Rail transport modelling scales - Wikipedia

    en.wikipedia.org/.../Rail_transport_modelling_scales

    a foreshortening technique using N scale model trains in the background (distance) with HO scale in the foreground. mixing 1:43 scale, 1:48 scale and 1:50 scale die-cast models with O scale model trains. using Matchbox cars (1:64 to 1:100) with HO scale and S scale. mixing OO scale British model trains with HO scale models. Both scales run on ...

  6. Athearn - Wikipedia

    en.wikipedia.org/wiki/Athearn

    Athearn, models representing a balance of detail features and price point, in HO and N scale. Roundhouse, representing affordable, durable models for entry-level buyers; from 2004 to 2015 the line consisted of former "Blue box" models only. [6] McHenry, HO-scale and N-scale model railroad couplers

  7. Ruler - Wikipedia

    en.wikipedia.org/wiki/Ruler

    A variety of rulers A carpenter's rule Retractable flexible rule or tape measure A closeup of a steel ruler A ruler in combination with a letter scale. A ruler, sometimes called a rule, scale or a line gauge or metre/meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. [1]

  8. OO gauge - Wikipedia

    en.wikipedia.org/wiki/OO_gauge

    OO scale (left) and HO scale (right) models of the EMD Class 66, showing the size difference. OO scale permits a level of detail including weathering and individual numbering. 16.5 mm ( 0.65 in ) gauge at 4 mm:1 foot means that the scale gauge represents 4 ft 1 + 1 ⁄ 2 in (1,257 mm), 7 inches (178 mm) narrower than the prototype 4 ft 8 + 1 ...

  9. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    ruler: for measuring length saccharometer: amount of sugar in a solution seismometer: seismic waves (for example, earthquakes) sextant: location on Earth's surface (used in naval navigation) spectrometer: properties of light spectrophotometer: intensity of light as a function of wavelength speedometer: speed, velocity of a vehicle spirometer ...