Railway modelling or model railroading is a hobby in which rail transport systems are modelled at a reduced scale.
OO gauge or OO scale is the most popular standard-gauge model railway standard in the United Kingdom, outside of which it is virtually unknown. OO gauge is one of several 4 mm-scale standards, and the only one to be marketed by major manufacturers. The OO track gauge of 16.5 mm corresponds to prototypical gauge of 4 ft 1+1⁄2 in, rather than 4 ft 8+1⁄2 in standard gauge. However, since the 1960s, other gauges in the same scale have arisen—18.2 mm (EM) and 18.83 mm (Scalefour)—to reflect the desire of some modellers for greater scale accuracy.
HO or H0 is a rail transport modelling scale using a 1:87 scale. It is the most popular scale of model railway in the world. The rails are spaced 16.5 millimetres (0.650 in) apart for modelling 1,435 mm standard gauge tracks and trains in HO.
N scale is a popular model railway scale. Depending upon the manufacturer, the scale ranges from 1:148 to 1:160. Effectively the scale is 1:159, 9 mm to 1,435 mm, which is the width of standard gauge railway. However the scale may vary to simulate wide or narrow gauge rail. In all cases, the gauge is 9 mm or 0.354 in. The term N gauge refers to the track dimensions, but in the United Kingdom in particular British N gauge refers to a 1:148 scale with 1:160 track gauge modelling. The terms N scale and N gauge are often inaccurately used interchangeably, as scale is defined as ratio or proportion of the model, and gauge only as a distance between rails. The scale 1:148 defines the rail-to-rail gauge equal to 9 mm exactly, so when calculating the rail or track use 1:160 and for engines and car wheel base use 1:148.
TT scale is a model railroading scale using 1:120 scale with a gauge of 12 mm between the rails. It is roughly halfway between HO scale (1:87) and N scale (1:160). Its original purpose, like the name suggests, was to make a train set small enough to assemble and operate on a tabletop.
EM gauge is a variant of 4 mm to a foot (1:76) scale used in model railways.
OO9, often also denoted as 009 or 00-9 is a model railway scale and gauge combination of 4 mm scale and 9 mm gauge tracks, which models a prototype track gauge of 2 ft 3 in. It is a common choice in the United Kingdom for the modelling of narrow-gauge railways whose prototype gauges lie approximately between 2 ft and 2 ft 6 in. The 9 mm 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 available.
Hornby Railways is a British model railways manufacturing company. Its roots date back to 1901 in Liverpool, when founder Frank Hornby received a patent for his Meccano construction toy. The first clockwork train was produced in 1920. In 1938, Hornby launched its first 00 gauge train. In 1964, Hornby and Meccano were bought by their competitor, Tri-ang, and sold when Tri-ang went into receivership. Hornby Railways became independent again in the 1980s, and became listed on the London Stock Exchange, but due to financial troubles reported in June 2017, became majority owned by British turnaround specialist Phoenix Asset Management.
The use of a third rail in rail transport modelling is a technique that was once applied, in order to facilitate easier wiring.
4 mm scale is the most popular 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.
The GWR 6100 Class is a class of 2-6-2T side tank steam locomotives.
HOn30 gauge is the modelling of narrow-gauge railways in HO on N gauge track in 1:87 scale ratio.
G&R Wrenn was a toy company specialising in the manufacture of model railways. It was founded in 1950 by George & Richard Wrenn.
On30gauge is the modelling of narrow gauge railways in O scale on HO gauge track in 1:48 scale ratio by American and Australian model railroaders, in 1:43.5 scale ratio by British and French model railroaders and 1:45 by Continental European model railroaders.
Rail transport modelling uses a variety of scales to ensure scale models look correct when placed next to each other. Model railway scales are standardized worldwide by many organizations and hobbyist groups. Some of the scales are recognized globally, while others are less widespread and, in many cases, virtually unknown outside their circle of origin. Scales may be expressed as a numeric ratio or as letters defined in rail transport modelling standards The majority of commercial model railway equipment manufacturers base their offerings on Normen Europäischer Modellbahnen (NEM) or National Model Railroad Association (NMRA) standards in most popular scales.
Heljan A/S is a Danish model railway company based in Søndersø. Originally specialising in decorations and accessories for model railways, it has now also developed a substantial range of rolling stock. It has diversified into modelling the British scene, and since 2002 has released several OO gauge diesel locomotives, and several O gauge models. British Outline now forms the biggest part of the Heljan business and UK operations are run from Denmark through an agent. In line with other model train companies and to keep costs to a minimum models are manufactured in China.
Rosebud Kitmaster is the brand name of a short-lived but critically acclaimed range of plastic assembly kits, manufactured in the United Kingdom by Rosebud Dolls Ltd of Raunds, Northamptonshire. Introduced from May 1959, the range rapidly expanded to include 34 models of railway locomotives and coaches in OO, HO and TT scales, and eventually, one motorcycle in 1:16 scale.
3 mm scale, also known as 3 mm finescale, is a model railway scale of 3 mm: 1 ft used for British prototypes. Introduced as British TT gauge, it sits approximately halfway between British N gauge and OO gauge, but is not as popular as either and there is no longer any mass manufacturer ready-to-run support. When TT gauge model railways were developed for British prototypes, in order to fit the small British prototypes, the scale was enlarged but without altering the 12mm gauge. The result, British TT gauge, is too narrow. This led to the development of 14.2 mm gauge 3mm finescale. Thus two finescale standards were developed. By far the more common of these is 14.2 mm gauge track, which is accurate. Some modellers choose to use slightly narrower 13.5 mm track due to the necessary oversize motion of outside-cylindered steam locomotives.
British N gauge is a model railway scale and gauge, rolling stock is to a scale of 1:148, track is 9 mm width as with all other N gauges making track and rolling stock approximately 10% out of scale with respect to each other. The 9 mm track width derives from a scale of 1:160 for 1,435 mmstandard gauge rails.
