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In some automated systems, the central unit needs to know when trains reach their destination or a certain point. This information is detected by a sensor, such as an infrared device placed between the tracks, a reed switch or a device which senses current draw in an isolated section of track.
The equipment that connects the couplers to the vehicles is the draft gear or draw gear, which must absorb the stresses of the coupling and the acceleration of the train. Throughout the history of rail vehicles, a variety of coupler designs and types have been developed worldwide.
A Japanese H0e scale model railroad One of the smallest (Z scale, 1:220) placed on the buffer bar of one of the larger (live steam, 1:8) model locomotives HO scale (1:87) model of a North American center cab switcher shown with a pencil for size Z scale (1:220) scene of a 2-6-0 steam locomotive being turned.
A train (from Old French trahiner, from Latin trahere, "to pull, to draw") [1] is a series of connected vehicles that run along a railway track and transport people or freight. Trains are typically pulled or pushed by locomotives (often known simply as "engines"), though some are self-propelled, such as multiple units or railcars.
Tram-trains are railcars or trains which run like trams (streetcars) in city streets, and on heavy rail tracks out to the suburbs or between the cities. Usually, this requires two current systems (German Zweisystemstadtbahn , Stadtbahn with two systems), both the tram voltage (600 or 750 V DC) and the heavy rail high voltage (in Germany, 15 kV AC).
HO or H0 is a rail transport modelling scale using a 1:87 scale (3.5 mm to 1 foot). It is the most popular scale of model railway in the world. [1] [2] The rails are spaced 16.5 millimetres (0.650 in) apart for modelling 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge tracks and trains in HO.