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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. Equivalent radius - Wikipedia

    en.wikipedia.org/wiki/Equivalent_radius

    as one would expect. This is equivalent to the above definition of the 2D mean diameter. However, for historical reasons, the hydraulic radius is defined as the cross-sectional area of a pipe A, divided by its wetted perimeter P, which leads to =, and the hydraulic radius is half of the 2D mean radius. [3]

  4. Degree of curvature - Wikipedia

    en.wikipedia.org/wiki/Degree_of_curvature

    Where degree of curvature is based on 100 units of arc length, the conversion between degree of curvature and radius is Dr = 18000/π ≈ 5729.57795, where D is degree and r is radius. Since rail routes have very large radii, they are laid out in chords, as the difference to the arc is inconsequential; this made work easier before electronic ...

  5. Track transition curve - Wikipedia

    en.wikipedia.org/wiki/Track_transition_curve

    The second animation shows the increasing curvature of the transition curve which is able to connect to a circular arc of progressively smaller radius. In the horizontal plane, the radius of a transition curve varies continually over its length between the disparate radii of the sections that it joins—for example, from infinite radius at a ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  7. How Long You Could Last on Nothing but Social Security in 50 ...

    www.aol.com/long-could-last-nothing-social...

    It’s time to reconsider retiring on Social Security alone, especially if you’re one-half of a married couple. New data from GOBankingRates shows that across 50 major U.S. cities this income ...

  8. Shot grouping - Wikipedia

    en.wikipedia.org/wiki/Shot_grouping

    Diagram illustrating the relationship between distance, group size on the target (subtension) and angular group size. Mean point of impact (MPI) is the calculated center of the grouping, which is the average center of all the shots, and is not necessarily located at a hole in the target. [2]

  9. Howard throws 2 TD passes to Smith to help Ohio State rout ...

    www.aol.com/howard-throws-2-td-passes-044644924.html

    Howard finished 24 for 29 for 311 yards, his second 300-yard game of the season. Smith had six catches for 103 yards, the sixth freshman to have over 100 receiving yards in a CFP game. Henderson ...