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| Re: Speed (1510879) | |||
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Re: Speed |
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Posted by Express Rider on Wed Apr 24 13:42:59 2019, in response to Re: Speed, posted by randyo on Tue Apr 23 21:14:32 2019. Thank you.Reading this, I was at first surprised that there had been no upgrade to electro-pneumatic, but then I thought, with this much older fleet, and the characteristics of the "L" ROW, that CTA thought it would be an un-necessary expense. Also re: the M-19C brake valve - did you mean that some of the Chicago fleet was AML, or just a comparison with the BMT el fleet, stating that the latter used the AML/ M-19C equipment? Some Manhattan el cars (from the grand roster) are shown as being high voltage, others converted to low voltage (and some being electrified & Low-Voltage as built?). Did the portions of the fleet use AMU or AML braking? Was any portion converted or upgraded to electro-pneumatic? (the Composites were converted to Low voltage when transferred, correct? And would they have had electro-pneumatic braking - since they had operated in trains with the Gibbs cars which were upgraded to electro-pneumatic within what - ten years of the IRT's opening - or were they prohibited from operating in the subway with steel cars before the electro-pneumatic upgrade to the latter) Also, I had been told that the BU's were low voltage so they could operate with the MP-41's, also Low Voltage. So, was the BMT el fleet AML with low-voltage? But didn't the MP41's have AMU (or AMUE?), or were they triple valve as well? Thank you in advance! |
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