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| Re: PCC and other Trolley Question????? (1179710) | |||
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Re: PCC and other Trolley Question????? |
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Posted by Atomsk on Wed Oct 3 20:09:59 2012, in response to PCC and other Trolley Question?????, posted by Avid Reader on Wed Oct 3 17:52:34 2012. Just counting PCC streetcars, built in North America, there were 78 double ended cars, out of nearly 5000 total PCCs built. The breakdown goes:15 - San Francisco (some still running) 30 - Pacific Electric (were any preserved?) 25 - Dallas (later went to Boston) 8 - Illinois Terminal (later Shaker Heights) I know of very few PCCs with pantographs. Pittsburgh used them on some lines, and cars in the Newark subway as well. The design of the overhead wire governs which type of current collector a car uses. You can only use a trolley pole with "variable tension" wires (in this case, "tension" refers to the physical "pull" on the wires, and does not mean the synonym for voltage). If you have "constant tension" wire, you need a pantograph. Since most trolley lines used the simpler (and cheaper) variable tension system they got by just fine with trolley poles. When trolley lines became "light rail systems", they usually upgraded their infrastructure to the more reliable but more complex constant tension overhead. |
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