File:Third rail at South Station, October 2002.jpg
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DescriptionThird rail at South Station, October 2002.jpg |
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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Original file by ArnoldReinhold at English Wikipedia A later version was uploaded by Deltabeignet at English Wikipedia |
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This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. Subject to disclaimers. | ||
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This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. Subject to disclaimers.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
Original upload log edit
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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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:55, 16 February 2024 | 955 × 523 (67 KB) | Beao (talk | contribs) | Cropped 1 % horizontally, 2 % vertically using CropTool with lossless mode. Removed border. | |
15:48, 12 July 2008 | 963 × 531 (74 KB) | File Upload Bot (Magnus Manske) (talk | contribs) | {{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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