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  2. List of rail transport modelling scale standards - Wikipedia

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

    The 37.5 mm length is not derived by a certain scale ratio. While HO scale is a 1:87 scale (3.5 mm to 1 foot), resulting in a 16.5 mm (0.65 in) gauge from real life prototype 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge standard gauge. Conversely, modeling standard gauge in Lego trains would yield a scaling of (37.5:1435 =) 1:38.3.

  3. V scale (model railroading) - Wikipedia

    en.wikipedia.org/wiki/V_scale_(model_railroading)

    V-scale model railroading was created when Japanese game developer Artdink released A-Train in 1985, but it was not widely popularized until Microsoft released Microsoft Train Simulator (sometimes referred to as MSTS) and Australia's Auran/N3V Games released the successful family of Trainz railroad simulators, both in 2001. With the ability to ...

  4. Grade (climbing) - Wikipedia

    en.wikipedia.org/wiki/Grade_(climbing)

    The V-scale is an open-ended scale that starts at V0 (although a slightly easier "VB" has been used for beginners), and increases in single-digit steps (i.e. V5, V6, V7), and was at V17 in 2023 with Burden of Dreams. The V-scale doesn't consider risk and is purely focused on the technical difficulty of the movements. [2]

  5. 3 ft gauge rail modelling - Wikipedia

    en.wikipedia.org/wiki/3_ft_gauge_rail_modelling

    Sn3 – Using S scale (1:64 ratio) with 14.3 mm (0.563 in) gauge track. Limited commercial support. On3 – Using O scale (1:48 ratio) with 0.75 in (19.05 mm) gauge track. Probably the second most popular scale. F scale – using 1:20.3 ratio with 45 mm (1.772 in) gauge track. This scale uses the same gauge as, and is derived from the popular G ...

  6. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    Schabak/Schuco also produces airliner models in this scale. [5] 1:570: 0.535 mm: Ship models: This scale was used by Revell for some ship models because it was one-half the size of the standard scale for wargaming models used by the U.S. Army. 1:535: 0.022: 0.570 mm: Ship models: Scale used by Revell for USS Missouri ship. Sometimes called "box ...

  7. List of body armor performance standards - Wikipedia

    en.wikipedia.org/wiki/List_of_body_armor...

    Test Standards now define how many shots must be used to estimate a v 0 for the armor certification. This procedure defines a confidence interval of an estimate of v 0. (See "NIJ and HOSDB test methods".) v 0 is difficult to measure, so a second concept has been developed in ballistic testing called the ballistic limit (v 50). This is the ...

  8. Miniature model (gaming) - Wikipedia

    en.wikipedia.org/wiki/Miniature_model_(gaming)

    Z scale is 1:220 ratio. The standard for old 1970–1980 large-scale display plastic aircraft, a large majority of diecast aircraft, and science fiction plastic kits. Also popular in other genres, such as ancient, fantasy, and sci-fi. One scale inch is equivalent to approximately 1/200 of an inch, 0.005 inches and 25.4 millimetres.

  9. Sunscreen - Wikipedia

    en.wikipedia.org/wiki/Sunscreen

    In the UK and Ireland, the Boots star rating system is a proprietary in vitro method used to describe the ratio of UVA to UVB protection offered by sunscreen creams and sprays. Based on original work by Brian Diffey at Newcastle University , the Boots Company in Nottingham, UK, developed a method that has been widely adopted by companies ...