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File:Third rail at South Station, October 2002.jpg

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Summary

Description
English: Third rail at the South Station stop on the MBTA Red Line. While the third rail shown here may look old and grungy, it is actually advanced mass transit technology. Third rail is subject to heavy wear and must be made out a strong material, typically steel. Unfortunately, steel is a relatively poor electrical conductor. A new method for reducing the resulting resistive losses is to attach strips of aluminum (which is a better conductor of electricity) to the steel third rail. Since aluminum has a different coefficient of thermal expansion from steel, the strips must be applied on both sides and riveted at frequent intervals. The third rail pictured here uses this method.
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Author Original file by ArnoldReinhold at English Wikipedia
A later version was uploaded by Deltabeignet at English Wikipedia

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Original upload log

The original description page was here. All following user names refer to en.wikipedia.
  • 2007-04-18 03:35 Deltabeignet 963×531×8 (75894 bytes) cropped to remove banner
  • 2004-09-06 19:09 ArnoldReinhold 1280×960×8 (274721 bytes) Third rail at Boston's South Station

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6 October 2002

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File history

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Date/TimeThumbnailDimensionsUserComment
current21:55, 16 February 2024Thumbnail for version as of 21:55, 16 February 2024955 × 523 (67 KB)BeaoCropped 1 % horizontally, 2 % vertically using CropTool with lossless mode. Removed border.
15:48, 12 July 2008Thumbnail for version as of 15:48, 12 July 2008963 × 531 (74 KB)File Upload Bot (Magnus Manske) {{BotMoveToCommons|en.wikipedia}} {{Information |Description={{en|en:Third rail at the South Station stop on the en:Boston subway's [[:en:Red Line (Massachusetts Bay Transportat

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