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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.
The European standard of 1:22.5 scale trains on 45 mm (1.772 in) track is called IIm scale, as per European narrow-gauge naming conventions or G scale, its popular name. Live steam: 1:24: 63 mm At 2 + 1 ⁄ 2 in (64 mm), this is the smallest of the "ridable" gauges [citation needed]. Only one or two passengers can be pulled.
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.
Thus the scale and approximate prototype gauge are represented, with the model gauge used (9 mm for H0e gauge; 6.5 mm for H0f gauge) being implied. [2] 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 ...
The British Railways Standard Class 9F 2-10-0 is a class of steam locomotive designed for British Railways by Robert Riddles.The Class 9F was the last in a series of standardised locomotive classes designed for British Railways during the 1950s, and was intended for use on fast, heavy freight trains over long distances.
Freight Australia commenced a program of engine upgrades purchasing new, more powerful EMD 16-645F3B engines for some of the G class, with the old engines being used to repower X class locomotives, later recoded the XR class. [15] [16] The upgraded G classes were G523, G526, G529, G530, G531, G536, G541 and G543. These locos now have a power ...
The next largest scale range, G scale (1:22.5) in the US and 16 mm scale (1:19.05) in the UK, and as large as 1:12 scale, is too small for riding but is used for outdoor garden railways, which allow use of natural landscaping. G scale is also sometimes used indoors, with the track mounted adjacent to walls at eye level of standing adults.
The locomotive was capable of traversing curves of 275 feet (84 metres) radius with 3 ⁄ 4 inch (19 millimetres) gauge widening. [2] [4] The Class 15F was delivered with a Watson Standard no. 3B boiler and a Watson cab. During the 1930s, Day's predecessor as CME, A.G. Watson, designed a standard boiler type as part of his standardisation policy.
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