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  2. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    4.689 mm Ships, die-cast cars. Similar to 1:64. 1:64: 4.763 mm Ships, die-cast cars. Matchbox and Hot Wheels use this scale to describe their vehicles, although the actual scale of the individual models varies from 1:55 to beyond 1:100. Same as S Scale. Also called 3 ⁄ 16 in. scale. Known as 25 mm figure scale in wargaming circles. [12] 1:60 ...

  3. Vehicle size class - Wikipedia

    en.wikipedia.org/wiki/Vehicle_size_class

    Vehicle size classes are series of ratings assigned to different segments of automotive vehicles for the purposes of vehicle emissions control and fuel economy calculation. . Various methods are used to classify vehicles; in North America, passenger vehicles are classified by total interior capacity while trucks are classified by gross vehicle weight rating (GV

  4. List of gauge conversions - Wikipedia

    en.wikipedia.org/wiki/List_of_gauge_conversions

    Port Harcourt – Onne, convertible sleepers installed since gauge conversion not imminent. 1,067 mm (3 ft 6 in) 750 mm (2 ft 5 + 1 ⁄ 2 in) 1915 Norway: Sulitjelma Line converted from 750 mm (2 ft 5 + 1 ⁄ 2 in) to dual gauge with 1,067 mm (3 ft 6 in) and when later closed was converted to a road. 1,435 mm (4 ft 8 + 1 ⁄ 2 in)

  5. Track gauge conversion - Wikipedia

    en.wikipedia.org/wiki/Track_gauge_conversion

    Track gauge conversion is the changing of one railway track gauge (the distance between the running rails) to another. In general, requirements depend on whether the conversion is from a wider gauge to a narrower gauge or vice versa, on how the rail vehicles can be modified to accommodate a track gauge conversion, and on whether the gauge conversion is manual or automated.

  6. 3 ft 6 in gauge railways - Wikipedia

    en.wikipedia.org/wiki/3_ft_6_in_gauge_railways

    3621 km 3 ft 6 in (1,067 mm) gauge (858 km or 533 mi electrified). Some converted from 1,000 mm (3 ft 3 + 3 ⁄ 8 in) and 2 ft 6 in (762 mm) gauge. Congo, Republic of: The Congo–Ocean Railway, 502 kilometres (312 mi) long (operating). Costa Rica: Operation of the national railway network was suspended in 1995 after an earthquake.

  7. Standard-gauge railway - Wikipedia

    en.wikipedia.org/wiki/Standard-gauge_railway

    George Stephenson introduced the 1,435 mm (4 ft 8 + 1 ⁄ 2 in) gauge (including a belated extra 1 ⁄ 2 in (13 mm) of free movement to reduce binding on curves [16]) for the Liverpool and Manchester Railway, authorised in 1826 and opened 30 September 1830. The extra half inch was not regarded at first as very significant, and some early trains ...

  8. International roughness index - Wikipedia

    en.wikipedia.org/wiki/International_roughness_index

    The quarter car model has higher correlations to light trucks and heavy trucks. [2] IRI values are reported as inches per mile (in/mi), meters per kilometer (m/km), or millimeters per kilometer (mm/km) based upon the movement of the suspension over the distance driven.

  9. Wheel sizing - Wikipedia

    en.wikipedia.org/wiki/Wheel_sizing

    A good example of such wheel combination is having 19 in × 8 in (480 mm × 200 mm) in front and 19 in × 9.5 in (480 mm × 240 mm) in the rear. Technically, wider wheels in the rear allow better grip with the road surface which is a performance benefit for better acceleration. Advantages