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Walk-through trains
On Thu, 13 Aug 2009, Basil Jet wrote:
Bruce wrote: On Thu, 13 Aug 2009 12:22:13 +0100, "Recliner" wrote: The ever-reliable Wiki source says that the 2009 stock is 2.68m wide and the 1973 stock 2.629, so the 2009 stock is apparently 5cm or 2" wider. It also says that, "Unlike the 1967 Tube Stock, the trains are built 40 millimetres (1.6 in) wider to take advantage of the Victoria line's slightly larger than normal loading gauge compared to the other deep level tube lines." Ironically, one of the reasons why the Victoria Line tunnel was built to a larger diameter was to reduce air resistance. ;-) It's not unreasonable to build the first stock for the line small to reduce air resistance, and then build subsequent stock large to push the hot air along. If the air's hot, then building the train bigger means there's less of it surrounding the train, so the train won't get heated up by it so much. Stands to reason. tom -- Jim-Jammity Jesus Krispy Kreme Christ on a ****-rocket! |
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