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| BMT Standard Roofs and Ventilation (859432) | |||
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BMT Standard Roofs and Ventilation |
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Posted by straphanger9 on Mon Nov 16 20:42:14 2009 Here's a bit of an odd question but a couple of questions I've been wondering anyway. The early BMT Standards ( - 2499) appear to have used a roof design with grill roof vents like below:(Outside)  (Inside)  For the 2500's cars, the exterior design seems to have changed from the "grill vent" style to a much more enclosed type (possibly to keep moisture out?) while the interior appeared not to change very much:  However by the 2600's and up, the design seems to have changed again, to a more "Lo-V style" clerestory vent: (Outside)  (Inside)  So why the changes? Were they experimenting with new designs for this, and decided to go back to the Lo-V style? Was there something wrong with the other designs? For the BMT, which was more "forward thinking" in its car design than the IRT it's almost odd that they would go back to a Lo-V style clerestory roof pattern after trying the others. Was there some sort of operational or car equipment reason for doing this? Thanks in advance |
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