Proceedings of the Annual Convention (Volume 24) - Bookswagon
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Proceedings of the Annual Convention (Volume 24)

Proceedings of the Annual Convention (Volume 24)


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Book may have numerous typos, missing text, images, or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1913. Excerpt: ... Appendix IX. DISCUSSION" BY WILLIAM FORSYTH OF PAPER BEFORE AMERICAN SOCIETY FOR TESTING MATERIALS. I will discuss the breakage of steel rails with special reference to the impact due to heavy wheel loads and high speeds. The paper by Mr. Wille gives data relating to the increase in the weight on drivers of locomotives and shows that it has increased 85 per cent in the past 10 years. The load on a single driving wheel is now frequently as high as 30,000 pounds, and the centrifugal effect of the counterbalance in unbalanced engines may increase this static load by onethird, making a maximum load of 40,000 pounds per wheel at high speed. The ordinary assumption of 100 per cent addition for impact due to live load is not sufficient, as it can be shown mathematically that the force of impact increases as the square of the velocity. This demonstration with special reference to the stress in rails will be found in a paper by Mr. Mattes at a Scranton meeting of the American Association of Mining Engineers. The magnitude of the stress in rails with a static wheel load of 40,000 pounds may be nine times as great at 75 miles per hour as at 25 miles per hour, and light rails which do not break under the heaviest locomotives at ordinary freight speeds, would not be safe on level roads where the speed of passenger engines is high. The report of the New York Railroad Commission shows a large number of broken rails for the winter months on the Lake Shore and New York Central railroads, and it is on these lines that the highspeed 18 and 20 hour train schedules are maintained winter and summer. The principal cause of rail breakage on these lines is largely due to heavy wheel loads acting at high velocities. Where the track is heaved by frost and very rigid, as it must be in zero weather, and the rai...


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Product Details
  • ISBN-13: 9781153887199
  • Publisher: General Books
  • Publisher Imprint: General Books
  • Height: 246 mm
  • No of Pages: 212
  • Spine Width: 11 mm
  • Width: 189 mm
  • ISBN-10: 1153887193
  • Publisher Date: 01 Jan 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 386 gr


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