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Lego trains use a fixed nominal gauge of 37.5 mm (1 + 15 ⁄ 32 in), based on 5-stud track centerlines gauge. [5] [6] [7] The 37.5 mm length is not derived by a certain scale ratio. 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 ...
Ballaarat has been featured in Model Engineer magazine as a 5-inch gauge working live steam construction project aimed at the beginner who wants to gain model engineering experience. The model runs on coal or anthracite and has a fully functioning steam boiler of 2 litres (3.5 imperial pints; 4.2 US pints) capacity running at 90 psi steam pressure.
64 mm (2 + 1 ⁄ 2 in) gauge 3 track is commercially available, as are a growing number of locomotive and rolling stock kits. 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
16.5 mm (0.65 in) gauge corresponds to 4 ft 8 + 1 ⁄ 2 in (1,435 mm) standard gauge in H0 (half-0) 3.5 mm/1 foot or 1:87.1. This arose due to British locomotives and rolling stock being smaller than those found elsewhere, leading to an increase in scale to enable H0 scale mechanisms to be used.
Often the gauge has little to do with the scale of a locomotive since larger equipment can be built in a narrow gauge railway configuration. For instance, scales of 1.5, 1.6, 2.5, and 3 inches per foot (corresponding to scales of 1:8 to 1:4) have been used on a 7 + 1 ⁄ 2 in (190.5 mm) track gauge.
Advances in locomotive design, particularly the advent of diesel-electric power, eventually rendered No. 999 obsolete. [ 1 ] [ 5 ] After touring the nation and making appearances at numerous expositions, including the 1948-49 Chicago Railroad Fair , the unit was retired from service in May 1952, following its demotion to yard switching service ...
Henry Greenly's 1:1 blueprint diagrams for 0 to 2½ gauge, a page from the 1924 Bassett-Lowke Catalogue B. Greenly's designs have been celebrated in countless periodicals and books, [4] but the greatest testimony to his skill is the enormous number of his locomotives that are still operating today.
The first encompassed steam locomotives that ran on a gauge of 10¼ inch or greater which followed full scale practice in terms of boiler design and operation, as exemplified by the 15 inch gauge, Henry Greenly designed Romney, Hythe and Dymchurch Railway in Kent. The second encompassed locomotives that were of 2½ inch gauge or less which ...