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≡ 1 ft/(h⋅s) = 8.4 6 × 10 −5 m/s 2: foot per minute per second: fpm/s ≡ 1 ft/(min⋅s) = 5.08 × 10 −3 m/s 2: foot per second squared: fps 2: ≡ 1 ft/s 2 = 3.048 × 10 −1 m/s 2: gal; galileo: Gal ≡ 1 cm/s 2 = 10 −2 m/s 2: inch per minute per second: ipm/s ≡ 1 in/(min⋅s) = 4.2 3 × 10 −4 m/s 2: inch per second squared ...
Track gauge conversion is the changing of one railway track gauge (the distance between the running rails) to another. In general, requirements depend on whether the conversion is from a wider gauge to a narrower gauge or vice versa, on how the rail vehicles can be modified to accommodate a track gauge conversion, and on whether the gauge conversion is manual or automated.
This is a list of notable railway track gauge conversions, railway lines where the distance between the rails is broadened or narrowed.Conversions to broader gauge are generally to accommodate heavier loads or for wider cars, while conversions to narrower gauge tend to be for compatibility with other lines on a rail network.
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.
Metre-gauge railways (US: meter-gauge railways) are narrow-gauge railways with track gauge of 1,000 mm (3 ft 3 + 3 ⁄ 8 in) or 1 metre. [ 1 ] Metre gauge is used in around 95,000 kilometres (59,000 mi) of tracks around the world.
The Panama Railroad was originally 5 ft (1,524 mm) as in much of the Southern United States. This gauge was converted to 1,435 mm ( 4 ft 8 + 1 ⁄ 2 in ) when the line was rebuilt in 2000. Nowadays only the ship handling trains along the Panama Canal , called mules , still have the 150 cm / 5 ft track.
Variable gauge axles were used for a while on the Grand Trunk Railway in the 1860s in Canada to connect 5 ft 6 in (1,676 mm) and 4 ft 8 + 1 ⁄ 2 in (1,435 mm) standard gauge without transshipment. Five hundred vehicles were fitted with "adjustable gauge trucks" but following heavy day-in, day-out use the system proved unsatisfactory ...
(4 ft 10 + 7 ⁄ 8 in) 1520 mm: 1,520 mm (4 ft 11 + 27 ⁄ 32 in) Five foot: 1,524 mm (5 ft) Pennsylvania gauge: 1,581 mm (5 ft 2 + 1 ⁄ 4 in) Pennsylvania gauge: 1,588 mm (5 ft 2 + 1 ⁄ 2 in) Five foot three inch: 1,600 mm (5 ft 3 in) Baltimore gauge: 1,638 mm (5 ft 4 + 1 ⁄ 2 in) Iberian gauge: 1,668 mm (5 ft 5 + 21 ⁄ 32 in) Five foot ...
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