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  2. ALCO RS-3 - Wikipedia

    en.wikipedia.org/wiki/ALCO_RS-3

    The ALCO RS-3 is a 1,600 hp (1.2 MW), B-B diesel-electric locomotive manufactured from May 1950 to August 1956 by American Locomotive Company (ALCO) and its subsidiary Montreal Locomotive Works (MLW). A total of 1,418 were produced: 1,265 for American railroads, 98 for Canadian railroads, 48 for Brazilian railroads, and seven for Mexican railroads.

  3. Tracker action - Wikipedia

    en.wikipedia.org/wiki/Tracker_action

    Tracker action in Jørlunde church.Organ by Frobenius (2009). Tracker action is a term used in reference to pipe organs and steam calliopes to indicate a mechanical linkage between keys or pedals pressed by the organist and the valve that allows air to flow into pipe(s) of the corresponding note. [1]

  4. Direct-shift gearbox - Wikipedia

    en.wikipedia.org/wiki/Direct-shift_gearbox

    A direct-shift gearbox (DSG, German: Direktschaltgetriebe [1]) [2] [3] is an electronically controlled, dual-clutch, [2] multiple-shaft, automatic gearbox, in either a transaxle or traditional transmission layout (depending on engine/drive configuration), with automated clutch operation, and with fully-automatic [2] or semi-manual gear selection.

  5. Obelisk - Wikipedia

    en.wikipedia.org/wiki/Obelisk

    These obelisks are now dispersed around the world, and fewer than half of them remain in Egypt. The earliest temple obelisk still in its original position is the 68-foot (20.7 m) 120-metric-ton (130-short-ton) [9] red granite Obelisk of Senusret I of the Twelfth Dynasty at Al-Matariyyah in modern Heliopolis. [10]

  6. Transmission (mechanical device) - Wikipedia

    en.wikipedia.org/wiki/Transmission_(mechanical...

    A transmission (also called a gearbox) is a mechanical device which uses a gear set—two or more gears working together—to change the speed, direction of rotation, or torque multiplication/reduction in a machine. [1] [2] Transmissions can have a single fixed-gear ratio, multiple distinct gear ratios, or continuously variable ratios. Variable ...

  7. List of bicycle parts - Wikipedia

    en.wikipedia.org/wiki/List_of_bicycle_parts

    Hub gear: a gearbox mounted inside the hub, 3-speed is common, 5, 7 are available ("Sturmey-Archer"), Enviolo makes a CVT, and Rohloff makes a 14-speed hub. Cable operated by one or two cables; Indicator: a turn signal; Inner tube: a bladder that contains air to inflate a tire. Has a Schrader, "Woods"/"Dunlop" or Presta valve for inflation and ...

  8. List of Egyptian obelisks - Wikipedia

    en.wikipedia.org/wiki/List_of_Egyptian_obelisks

    The largest known obelisk, the unfinished obelisk, was never erected and was discovered in its original quarry. It is nearly one-third larger than the largest ancient Egyptian obelisk ever erected (the Lateran Obelisk in Rome); if finished it would have measured around 41.75 metres (137.0 ft) [ 6 ] and would have weighed nearly 1,090 tonnes ...

  9. Epicyclic gearing - Wikipedia

    en.wikipedia.org/wiki/Epicyclic_gearing

    This planetary gear train consists of a sun gear (yellow), planet gears (blue) and carrier (green) inside a ring gear (red) An epicyclic gear train (also known as a planetary gearset) is a gear reduction assembly consisting of two gears mounted so that the center of one gear (the "planet") revolves around the center of the other (the "sun").