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G scaleorG gauge, also called large scale (45 mm or 1+3⁄4 inches), is a track gauge for model railways which is often used for outdoor garden railways because of its size and durability. G scale trains use a fixed track gauge of 45 millimetres (1.75 in) to accommodate a range of rail transport modelling scales between narrow gauge (~1:13‒1:19‒1:20), metre gauge (1:22.5), Playmobil trains (~1:24), and standard gauge (~1:29–1:32).[3][2]
| G gauge | |
|---|---|
| Scale ratio | 1:22.5 |
| Standard(s) |
|
| Model gauge | 45 mm (1.75 in)[1] |
| Prototype gauge | 1,000 mm (3 ft 3+3⁄8 in) metre gauge |
G-scale LGB (Lehmann Groß Bahn, "Lehmann's Big Train") was introduced in 1968 by Ernst Paul Lehmann Patentwerk in Germany. LGB products were intended for indoor and outdoor use; so the "G" became interpreted as "garden scale".
Most track is made of brass which can remain outside in all weather. Track can also be obtained in less expensive aluminium as well as oxidation-resistant, though more expensive, stainless steel.
Like other scales, large scale is sometimes used for model trains that run indoors on a track mounted against the wall near the ceiling.
Ggauge track has a spacing of 45 mm between the railheads (tracks) (c.f. 44.45 mm for 1 gauge , but that does not determine the scale to which the models are built because, to maintain a constant track width when real-life counterparts have a variety of railroad gauges, the scale has to vary. The most common full-scale practice uses a spacing of 4 ft 8+1⁄2 in (1,435 mm) standard gauge, whereas some narrow-gauge railways (serving mines, etc.) have rails only 3 ft (914 mm) apart. Although often built with standard-sized doors, a narrow-gauge train is in most other respects smaller than its standard-gauge counterpart: its cars are generally narrower and shorter, allowing them to navigate more sharply curved and lightly built tracks.
Model trains are built to represent a real train of standard or narrow gauge. For example, HO scale (1:87 or 3.5 mm to 1 foot) (and also, although inaccurately, double-O/OO at 4 mm to 1 foot) models all use 16.5 mm gauge track to represent standard gauge trains while a narrower-gauge track such as 9 mm N gauge is used to represent real narrow gauge.
G model railways depart from this and always use the same gauge with the trains instead built in different sizes depending on whether they are intended to represent standard-gauge or narrow-gauge trains. Because of this it might be more correct to speak of "G gauge" rather than "G scale" since the consistent aspect is the gauge, 45 mm (1.772 in), but the term "G scale" (or "scale IIm") is used when 1:22.5 is used.
The 45 mm gauge originated from 1 gauge or "gauge one" which was first used in Europe and Britain and used to model standard gauge trains in the scale of 1:32.
LGB were first to adopt the term G scale and used the gauge of 45 mm (1.772 in) to model 1,000 mm gauge European trains in 1:22.5 scale.
I/IIm/IIIe/Vi/Vilp … Modell-Spurweiten 45mm 1⁄3 Zoll. (6) Für große Spurweiten ist auch die Angabe in Zoll üblich.
The term LS (Large Scales) is used to refer to range of scales developed to be able to be operated together, typically in an outdoors setting, for example a garden. LS models all use the same wheel and track profiles to facilitate interchange.
Large Scales … covers all common commercial scales running on LS 45mm gauge track (1:32, 1:29, 1:24, 1:22.5, and 1:20.3) without regard as to whether the trains are standardornarrow gauge.
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