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  2. List of track gauges - Wikipedia

    en.wikipedia.org/wiki/List_of_track_gauges

    Train with model Southern Railway Schools class. Triple-gauge pointwork ( 3 + 1 ⁄ 2 in, 5 in, and 7 + 1 ⁄ 4 in) on the Orchid Line . The upper right branch does not include the 3 + 1 ⁄ 2 in gauge.

  3. Lockheed Martin F-35 Lightning II - Wikipedia

    en.wikipedia.org/wiki/Lockheed_Martin_F-35...

    The F-35 was the product of the Joint Strike Fighter (JSF) program, which was the merger of various combat aircraft programs from the 1980s and 1990s. One progenitor program was the Defense Advanced Research Projects Agency (DARPA) Advanced Short Take-Off/Vertical Landing (ASTOVL) which ran from 1983 to 1994; ASTOVL aimed to develop a Harrier jump jet replacement for the U.S. Marine Corps ...

  4. Standard-gauge railway - Wikipedia

    en.wikipedia.org/wiki/Standard-gauge_railway

    The American gauges converged, as the advantages of equipment interchange became increasingly apparent. Notably, all the 5 ft (1,524 mm) broad gauge track in the South was converted to "almost standard" gauge 4 ft 9 in (1,448 mm) over the course of two days beginning on 31 May 1886. [21] See Track gauge in the United States.

  5. List of rail transport modelling scale standards - Wikipedia

    en.wikipedia.org/wiki/List_of_rail_transport...

    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.

  6. Track gauge in the United States - Wikipedia

    en.wikipedia.org/wiki/Track_gauge_in_the_United...

    Chartered in 1832, its first section opening in 1841, the Erie's promoters and early engineers believed it would be so busy that wider gauged tracks would be required for locomotives much larger (and therefore more powerful) than usual to pull the expected very long and heavy trains. 6 ft gauge was also cited for improved stability, and the New ...

  7. List of narrow-gauge model railway scales - Wikipedia

    en.wikipedia.org/wiki/List_of_narrow-gauge_model...

    Many names, particularly those of British origin, such as O14 and 00-9 combine the name of the scale used with the physical measurement of the gauge, i.e. the 7 mm-to-the-foot scale from standard O gauge with a rail gauge of 14 mm, giving a precise representation of 2 ft (610 mm) prototypes.

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  9. Track geometry - Wikipedia

    en.wikipedia.org/wiki/Track_geometry

    This can be thought of as the plan view which is a view of a 3-dimensional track from the position above the track. In track geometry, the horizontal layout involves the layout of three main track types: tangent track (straight line), curved track , and track transition curve (also called transition spiral or spiral ) which connects between a ...

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