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| Re: [PHOTO] Mystery Photo - AB # 2644 (1570052) | |||
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Re: [PHOTO] Mystery Photo - AB # 2644 |
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Posted by randyo on Wed Mar 3 16:33:26 2021, in response to Re: [PHOTO] Mystery Photo - AB # 2644, posted by Express Rider on Wed Mar 3 09:42:18 2021. According to some documentation i’ve seen, a few BTs were created in the 1920s along with the Bs, abd BXs and there were a few AX units which were a 2400 series car coupled to a 4000 series trailer that had a M/M’s cab at one end. Neither the BTs nor the AXs lasted too long and by the end of the 1920s there were only Bs, Bxs and the single As necessary to make up 8 car trains when coupled to 2 B units. When the steels were GOHed circa 1960, only one BX was done and the TA opted to get rid of the 4000 series trailers and substitute a 2600 series A car for the trailer creating additional B units. A few former BX units were not converted to Bs but instead merely recoupled without the center car recreating the BTs which could be used to make up 8 car trains without having to use the few remaining A cars. When the steels were unitized in the 1920s, the C/Rs door controls were decommissioned so that only the center car of a unit had working door controls and was known as the “master” car. When the BTs were recreated, since they were only intended to be added to the ends of trains, the door controls were left decommissioned so that for a line like the Culver shuttle which only used 2 cars, BT units could not be used in that service. |
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