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Exact HO scale (half O of 7 mm = 1 foot) 1:87: 3.503 mm: Model railways (HO/h0) Civilian and military vehicles. Often used to describe HO scale. Original nominal 25 mm figure scale; though a 6-foot human in 1:87 is closer to 21 mm. 1:82: 3.717 mm An intermediate scale (HO/OO) intended to apply to both HO and OO scale train sets.
Ratio Gauge Notes 000 or 2 mm: 1:152: 9.42 mm (0.371 in) An early predecessor of small scales like N. Developed before World War II and became somewhat popular in the 1950s. No commercial products available. Today The 2mm Scale Association is the force behind the scale and 2 mm scale has become a finescale alternative to the British N-scale. N ...
[8] [9] This scale is also used to depict 3 ft 6 in (1,067 mm) narrow-gauge railways (using N scale 9 mm / 0.354 in gauge track and known as NZ120) of New Zealand. N scale: 1:148: 9 mm As with 1:160 N scale below, the name is derived from its Nine millimeter track gauge, but the scale is a slightly larger at 2.0625 mm = 1 foot (1:147.78 ...
A scale ruler is a tool for measuring lengths and transferring measurements at a fixed ratio of length; two common examples are an architect's scale and engineer's scale.In scientific and engineering terminology, a device to measure linear distance and create proportional linear measurements is called a scale.
7 mm scale, also known as British O scale is a model railway scale of 1:43.5 (or 7 mm to 1 ft; hence its name). [1] The scale is thus different from American O scale (1:48) [1] and European O scale (1:45). For standard gauge railways, 32mm gauge, or 0 gauge is most commonly used. [1]
For example, the aspect ratio of a rectangle is the ratio of its longer side to its shorter side—the ratio of width to height, [1] [2] when the rectangle is oriented as a "landscape". The aspect ratio is most often expressed as two integer numbers separated by a colon (x:y), less commonly as a simple or decimal fraction. The values x and y do ...
A standard metric (concrete) block is 190 mm wide, 390 mm long, and 190 mm high, which allows for 10 mm mortar joints in between bricks, giving a standard unit size of 200 mm square by 400 mm long. [3] A standard metric brick is 90 by 57 by 190 mm; with 10 mm of mortar, that produces a standard unit of 100 mm x 200 mm. [3]
4 mm scale is the most popular [1] model railway scale used in the United Kingdom. The term refers to the use of 4 millimeters on the model equating to a distance of 1 foot (305 mm) on the prototype (1:76.2). It is also used for military modelling. For historical reasons, a number of different standards are employed. [2]