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This was the first steam operated railway providing both freight and passenger services on such a small gauge and it proved the model for the introduction of narrow-gauge railways across the world. [3] In 1846, the British Parliament passed the Gauges Act that established 4 ft 8 + 1 ⁄ 2 in (1,435 mm) as the standard gauge for Britain. [4]
Europe. Australia. A narrow-gauge railway ( narrow-gauge railroad in the US) is a railway with a track gauge narrower than 1,435 mm ( 4 ft 81⁄2 in) standard gauge. Most narrow-gauge railways are between 600 mm ( 1 ft 115⁄8 in) and 1,067 mm ( 3 ft 6 in ). Since narrow-gauge railways are usually built with tighter curves, smaller structure ...
Pocket tape measures have a tape 0.3 to 10 metres (1 ft 0 in to 32 ft 10 in) in length and 6 to 25 millimetres (0.24 to 0.98 in) across. A second tape measure design is what is called the long tape. These are cased tape measures with tapes of up to 200 m in length.
All other railways use 1,668 mm (5 ft 5 + 21 ⁄ 32 in) (broad gauge); some use 1,000 mm (3 ft 3 + 3 ⁄ 8 in) metre gauge; Decauville uses 500 mm (19 + 3 ⁄ 4 in) gauge. Planned and under construction high-speed railways to use 1,668 mm ( 5 ft 5 + 21 ⁄ 32 in ) to maintain interoperability with the rest of the network.
The networks polarised into groups of broad gauge companies and of narrow gauge companies. The term narrow gauge at the time referred to 4 ft 8 + 1 ⁄ 2 in (1,435 mm) as well as any smaller size, all narrow relative to the broad gauge (whereas today it refers only to gauges strictly smaller than 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge).
Strain gauge: a device used to measure the strain of an object. Thread pitch gauge, also called a threading gauge, pitch gauge, or screw gauge a device used to measure the pitch or lead of screw threads. Vernier height gauge: a measuring device used either for determining the height of something, or for repetitious marking of items to be worked on.
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 81⁄2 in) standard gauge standard gauge. Conversely, modeling standard gauge in Lego trains would yield a scaling of (37.5:1435 =) 1:38.3.
3 ft gauge railways in the United Kingdom (4 C, 2 P) 3 ft 2 in gauge railways in the United Kingdom (1 C) Metre gauge railways in the United Kingdom (1 C, 1 P)