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In the early 1990s, the Atlas Tool Co. changed its name to Atlas Model Railroad Company, Inc. In 1997 Atlas O, LLC was established as a separate business entity dedicated to producing multiple lines of O scale model railroad products including track, freight cars, locomotives and accessories, co-founded and led by James J. Weaver.
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 gauge. As 00 is a particularly British scale, it is not included within this pan-European standard. However the predominantly US imperial-based S scale ...
This scale is today the most popular modelling scale in the UK, although it once had some following in the US (on 19 mm / 0.748 in gauge track) before World War II. 00 or "Double-Oh", together with EM gauge and P4 standards are all to 4 mm scale as the scale is the same, but the track standards are incompatible. 00 uses the same track as HO (16 ...
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In the 2004 Guinness World Records, Train Mountain is recognized as the “Longest Miniature Hobby Railroad”. [4] At the time Train Mountain was recognized by Guinness, it was reported to have 69,900 feet (13.24 mi; 21.3 km) of 7 + 1 ⁄ 2 in (190.5 mm) gauge mainline track and 133,250 feet (25.237 mi; 40.61 km) of total track including yards, sidings, spurs, and connector tracks.
1928-1932 and 1938-1940 Automobile Legal Association Green Book: large scale maps (not very detailed - only major routes) and major city inset maps; turn-by-turn directions can also be used to find old routings through cities; also contains rough route logs (i.e. cities passed through) for some of the longer routes in all eastern states; 1938 ...
Protofour or P4 is a set of standards for model railways allowing construction of models to a scale of 4 mm to 300 mm (1 ft) (1:76.2), [1] the predominant scale of model railways of the British prototype. For historical reasons almost all manufacturers of British prototype models use 00 gauge (1:76.2 models running on 16.5 mm (0.65 in) gauge ...
Then f determines its derivative map Df : E → E where for every edge e Df(e) is the initial edge of the path f(e). The map Df naturally extends to the map Df : T → T where T is the set of all turns in Γ. For a turn t given by an edge-pair e, h, its image Df(t) is the turn Df(e), Df(h).