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Re: Speed

Posted by Express Rider on Tue Apr 23 16:50:02 2019, in response to Re: Speed, posted by chicagomotorman on Tue Apr 23 08:52:10 2019.

re: The transmission gearing sound changed pitch proportionally to speed. The T/O eventually associated the sound pitch with a particular speed.

this would have been true for the original equipment operating in Chicago as well?
the cars ordered for the subway's opening (1940?) - did these have earlier AMUE or AMRE braking systems, or were they newer (SMEE or otherwise)?

did any of the original "L" rolling stock have gauges indicating existing/ available air pressure, or speedometers? and were the braking systems AMUE or AMRE, or both depending when the cars were built?
Thanks.

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