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  2. Minimum railway curve radius - Wikipedia

    en.wikipedia.org/wiki/Minimum_railway_curve_radius

    The minimum railway curve radius is the shortest allowable design radius for the centerline of railway tracks under a particular set of conditions. It has an important bearing on construction costs and operating costs and, in combination with superelevation (difference in elevation of the two rails) in the case of train tracks , determines the ...

  3. Track geometry - Wikipedia

    en.wikipedia.org/wiki/Track_geometry

    At a higher speed, the centrifugal force is higher. On the contrary, higher cant creates the higher centripetal force. The calculation for this assumes a constant train speed on a constant radius curve. When the speed of the train and the amount of cant are in balance (centrifugal matches centripetal), it is called equilibrium. This would make ...

  4. Hallade method - Wikipedia

    en.wikipedia.org/wiki/Hallade_method

    The following can be used to find the versine of a given constant radius curve: [2] The Hallade method is to use the chord to continuously measure the versine in an overlapping pattern along the curve. The versine values for the perfect circular curve would have the same number. [3]

  5. Cant (road and rail) - Wikipedia

    en.wikipedia.org/wiki/Cant_(road_and_rail)

    A Series 257 train on an S-curve in June 2018 showing the effect of railway superelevation. The necessary cant in a curve depends on the expected speed of the trains and the radius of curvature: the higher the speed, the greater the centrifugal force.

  6. Comparison of train and tram tracks - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_train_and...

    As the track starts to curve, the train tries to run straight. The wheel flange presses against the side of the curved rail [ citation needed ] so the "contact point" between rail and wheel moves a few millimeters outwards, making the effective diameter of the outer wheel temporarily larger, and equally opposite: the effective diameter of the ...

  7. Track spacing - Wikipedia

    en.wikipedia.org/wiki/Track_spacing

    Measurement of track spacing from the rail head to rail head. By definition, the track spacing is given from centre to centre of a rail track. For an actual construction the distance is measured from the inside of a rail head to the matching one of the other track. As far as both tracks have the same gauge this is the same distance.

  8. List of rail transport modelling scale standards - Wikipedia

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

    In terms of model railway operation, gauge 3 is the largest (standard gauge) scenic railway modelling scale, using a scale of 13.5 mm to the foot. The Gauge '3' Society represents this aspect of 2 + 1 ⁄ 2-inch gauge railway modelling with both electric and live steam operation. Gauge '3' corresponds to NEM II scale, also known as "Spur II" in ...

  9. Category:Track geometry - Wikipedia

    en.wikipedia.org/wiki/Category:Track_geometry

    Track geometry is three-dimensional geometry of track layouts and associated measurements used in design, construction and maintenance of railroad tracks.The subject is used in the context of standard, speed limits and other regulations in the areas of track gauge, alignment, elevation, curvature and track surface.