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OO gauge or OO scale (also, 00 gauge and 00 scale) is the most popular standard gauge model railway standard in the United Kingdom, [1] outside of which it is virtually unknown. OO gauge is one of several 4 mm-scale standards (4 mm to 1 ft (304.8 mm), or 1:76.2), and the only one to be marketed by major manufacturers.
The Westbound climb is longer and more varied in gradient, with 50 miles between Wenatchee and the tunnel portal, at a maximum of 2.2%. The rated speed of the locomotives was such that they could use their full power when climbing any gradient more than 0.7% [ 5 ]
It also justified the popular, but sometimes contrived, technique of a tunnel exit to the off-board fiddle yard. Fiddle yards, and their use for the "Fiddle Yard to Terminus" layout, were themselves a technique earlier popularised by Freezer. [1] [3] British railway modelling of this period was almost entirely OO gauge [citation needed].
American OO scale is a model railroad standard that has a scale of 4 mm to 1 foot (1:76) and utilises 19 mm (0.748 in) for the standard gauge track. The standard is different from British 00 gauge (which is popular in Great Britain), as it utilises 19mm gauge track rather than HO scale 16.5 mm ( 0.65 in ) gauge track.
It is a common choice in the United Kingdom for the modelling of narrow-gauge railways whose prototype gauges lie approximately between 2 ft (610 mm) and 2 ft 6 in (762 mm). The 9 mm ( 0.354 in ) track gauge is used by N gauge model railways, a common commercial scale, which means that a selection of wheels, track, and mechanisms is readily ...
The term HOn30 (and sometimes HOn2½) is generally used when modelling American prototypes while H0e is used for European prototypes. In Britain, the term OO9 is used. [1] All these terms refer to models of narrow-gauge railways built to the world's most popular model railway scale of HO (1:87) but using a track gauge of 9 mm (0.354 in)—the gauge used for N scale models of standard-gauge ...
For the construction of the Lötschberg line and the main tunnel two special railways had to be constructed to bring material from Frutigen or the junction at Naters near Brig to the portals of the Lötschberg tunnel. The gauge of the railways was 750 mm (2 ft 5 + 1 ⁄ 2 in), the maximum gradient was 60 per thousand (6%) and the minimum curve ...
Heljan's current UK OO gauge diesel loco range consists of British Rail Class 14s, 15s, 16s, 17s, 23s, 26s, 27s, 28s, 33s, 35s, 47s, 52s, Falcon, 57s, 58s, Lion and HS4000 Kestrel'. The British Rail Class 86s are currently the only AC Electric outline models in the range.
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