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Port Harcourt – Onne, convertible sleepers installed since gauge conversion not imminent. 1,067 mm (3 ft 6 in) 750 mm (2 ft 5 + 1 ⁄ 2 in) 1915 Norway: Sulitjelma Line converted from 750 mm (2 ft 5 + 1 ⁄ 2 in) to dual gauge with 1,067 mm (3 ft 6 in) and when later closed was converted to a road. 1,435 mm (4 ft 8 + 1 ⁄ 2 in)
Faxe Jernbane in southern Zealand, 791 mm 2 ft 7 + 5 ⁄ 32 in and 785 mm 2 ft 6 + 29 ⁄ 32 in, 2½ feet (785 mm) both gauges were used at Faxe Jernbane and Faxe limestone quarry, none remains, only a few materials and trains from Faxe Jernbane and Faxe limestone quarry remains for preservation on Hedeland veteran railway dk. [73] [74] 800 mm
Some railways, primarily in the northeast, used standard gauge of 4 ft 8 + 1 ⁄ 2 in (1,435 mm); others used gauges ranging from 2 ft (610 mm) to 6 ft (1,829 mm). As a general rule, southern railroads were built to one or another broad gauge, mostly 5 ft (1,524 mm), while northern railroads that were not standard-gauge tended to be narrow-gauge.
Using 32 mm (1.26 in) - 0 gauge - track, there is an extensive range of 16 mm to the foot scale [1:19] live-steam and other types of locomotives, rolling stock and accessories. Many of these models are dual gauge, and can be converted to run on 45 mm (1.772 in) track , and radio control is common.
In the late 1960s the gauge was redefined to 1,520 mm (4 ft 11 + 27 ⁄ 32 in) in the Soviet Union. [3] At the same time the tolerances were tightened. As the running gear of the rolling stock remained unaltered, the result was an increased speed and stability. [14] The conversion took place between 1970 and the beginning of the 1990s. [14]
The 4 ft 9 in (1,448 mm) railways were intended to take 4 ft 8 + 1 ⁄ 2 in (1,435 mm) gauge vehicles and allow a (second) running tolerance. The Chester and Birkenhead Railway, authorised on 12 July 1837, used 4 ft 9 in (1,448 mm). [31] The London and Brighton Railway, authorised on 15 July 1837, used 4 ft 9 in (1,448 mm). [32]
Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to include replacement of a quantity with a corresponding quantity that describes the same physical property.
Metric prefixes; Text Symbol Factor or; yotta Y 10 24: 1 000 000 000 000 000 000 000 000: zetta Z 10 21: 1 000 000 000 000 000 000 000: exa E 10 18: 1 000 000 000 000 000 000: peta P 10 15: 1 000 000 000 000 000: tera T