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| This MARTA Train Sounds Like An R142 (1605407) | |
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| (1605407) | |
This MARTA Train Sounds Like An R142 |
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Posted by Mitch45 on Mon Jun 27 20:52:09 2022 https://youtube.com/shorts/bfXMc0Nm5Kc?feature=share |
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| (1605409) | |
Re: This MARTA Train Sounds Like An R142 |
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Posted by William A. Padron on Mon Jun 27 21:39:52 2022, in response to This MARTA Train Sounds Like An R142, posted by Mitch45 on Mon Jun 27 20:52:09 2022. Exactly sounds like an R-142!!!Thanks for letting us know! -William A. Padron ["I R T Lines"] |
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| (1605410) | |
Re: This MARTA Train Sounds Like An R142 |
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Posted by r33/r36 mainline on Mon Jun 27 22:00:53 2022, in response to This MARTA Train Sounds Like An R142, posted by Mitch45 on Mon Jun 27 20:52:09 2022. I'm on mobile but if the train in the video is what I think it is, then it has the same propulsion as R142A* and R143.Slightly off topic but it crazy how NYCT NTT have a variety of different propulsion systems while the R10 though R68A ethier used GE or Westinghouse propulsion. I wonder why NYCT doesn't limit its tech train fleet to one or two propulsion systems like they did with the SMEE fleets. |
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| (1605411) | |
Re: This MARTA Train Sounds Like An R142 |
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Posted by Osmosis Jones on Mon Jun 27 22:25:26 2022, in response to Re: This MARTA Train Sounds Like An R142, posted by r33/r36 mainline on Mon Jun 27 22:00:53 2022. Doesn’t SEPTA use that same propulsion as well? |
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| (1605413) | |
Re: This MARTA Train Sounds Like An R142 |
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Posted by r33/r36 mainline on Tue Jun 28 00:29:00 2022, in response to Re: This MARTA Train Sounds Like An R142, posted by Osmosis Jones on Mon Jun 27 22:25:26 2022. I fanned both the Broad Street line and MFL over the winter and the populsion on the rolling stock on both routes sound nothing like anything on NYCT. So I think Septa uses different propulsion systems for their fleets. |
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| (1605426) | |
Re: This MARTA Train Sounds Like An R142 |
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Posted by Allan on Tue Jun 28 10:59:32 2022, in response to Re: This MARTA Train Sounds Like An R142, posted by r33/r36 mainline on Mon Jun 27 22:00:53 2022. It is somewhat apparent that full compatibility between rolling stock is not of interest to the decision makers at the MTA.I noticed it with the R142 and R142A. They tried to do a MU on the 5 back when the cars were new (5 cars R142, and 5 cars R142A). There were a number of problems including the FIND displays in the R142As would not work. There were some problems with the doors as well. |
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| (1605428) | |
Re: This MARTA Train Sounds Like An R142 |
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Posted by Jersey Mike on Tue Jun 28 11:20:04 2022, in response to Re: This MARTA Train Sounds Like An R142, posted by r33/r36 mainline on Tue Jun 28 00:29:00 2022. The B-IV cars got a custom IGBT based DC chopper mid-life propulsion upgrade that replaced the original GE cam controller. I suspect that the M-IV cars use a GTO based straight AC system. |
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| (1605431) | |
Re: This MARTA Train Sounds Like An R142 |
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Posted by Pelham Exp on Tue Jun 28 11:41:26 2022, in response to Re: This MARTA Train Sounds Like An R142, posted by Allan on Tue Jun 28 10:59:32 2022. I was fortunate as well to ride the mixed R142/R142A on the 6 on its last trip to Pelham before going out of service and heading to the yard. Never to see the mixed sets in service again... |
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| (1605432) | |
Re: This MARTA Train Sounds Like An R142A / R143 / Boston Type-8 |
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Posted by R46 5636 on Tue Jun 28 12:00:41 2022, in response to Re: This MARTA Train Sounds Like An R142, posted by Allan on Tue Jun 28 10:59:32 2022. The Kawasaki R142As accelerate slightly faster than their Bombardier R142 counterparts. The sets were basically fighting each other during that revenue run.The same goes for R160 Alstom & Siemens although not as severe, but the Siemens sets accelerate just slightly faster, which is why they don't normally run as mixed. A similar condition also exists for the braking system response times between the 68 & 68As. (Always wondered what did they specifically tweak on that 68/A mixed set that was coupled in service for a while?) If someone has the actual acceleration / deceleration statistics to compare the R142/A and R160 Alstom / Siemens I'd be curious to know as well. There's also a specific name for the traction motors found on the R142A, R143, MARTA Fleet, Boston Green Line Type-8 Trolleys (and some other location), I believe originally manufactured to AdTranz then sold to Bombardier (thus the R179 & CTA 5000 series having the upgraded version of the same traction system). I'm not sure of the specific technical names for these traction motor / propulsion systems. One more long-standing curiosity of mine is if the original MARTA cars had DC traction motors and "buzzed". Can't find any recordings or evidence of this. |
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| (1605433) | |
Re: This MARTA Train Sounds Like An R142A / R143 / Boston Type-8 |
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Posted by R46 5636 on Tue Jun 28 12:01:42 2022, in response to Re: This MARTA Train Sounds Like An R142, posted by Allan on Tue Jun 28 10:59:32 2022. The Kawasaki R142As accelerate slightly faster than their Bombardier R142 counterparts. The sets were basically fighting each other during that revenue run.The same goes for R160 Alstom & Siemens although not as severe, but the Siemens sets accelerate just slightly faster, which is why they don't normally run as mixed. A similar condition also exists for the braking system response times between the 68 & 68As. (Always wondered what did they specifically tweak on that 68/A mixed set that was coupled in service for a while?) If someone has the actual acceleration / deceleration statistics to compare the R142/A and R160 Alstom / Siemens I'd be curious to know as well. There's also a specific name for the traction motors found on the R142A, R143, MARTA Fleet, Boston Green Line Type-8 Trolleys (and some other location), I believe originally manufactured to AdTranz then sold to Bombardier (thus the R179 & CTA 5000 series having the upgraded version of the same traction system). I'm not sure of the specific technical names for these traction motor / propulsion systems. One more long-standing curiosity of mine is if the original MARTA cars had DC traction motors and "buzzed". Can't find any recordings or evidence of this. |
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| (1605434) | |
Re: This MARTA Train Sounds Like An R142A / R143 / Boston Type-8 |
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Posted by R46 5636 on Tue Jun 28 12:03:03 2022, in response to Re: This MARTA Train Sounds Like An R142, posted by Allan on Tue Jun 28 10:59:32 2022. The Kawasaki R142As accelerate slightly faster than their Bombardier R142 counterparts. The sets were basically fighting each other during that revenue run.The same goes for R160 Alstom & Siemens although not as severe, but the Siemens sets accelerate just slightly faster, which is why they don't normally run as mixed. A similar condition also exists for the braking system response times between the 68 & 68As. (Always wondered what did they specifically tweak on that 68/A mixed set that was coupled in service for a while?) If someone has the actual acceleration / deceleration statistics to compare the R142/A and R160 Alstom / Siemens I'd be curious to know as well. There's also a specific name for the traction motors found on the R142A, R143, MARTA Fleet, Boston Green Line Type-8 Trolleys (and some other location), I believe originally manufactured to AdTranz then sold to Bombardier (thus the R179 & CTA 5000 series having the upgraded version of the same traction system). I'm not sure of the specific technical names for these traction motor / propulsion systems. One more long-standing curiosity of mine is if the original MARTA cars had DC traction motors and "buzzed". Can't find any recordings or evidence of this. |
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| (1605448) | |
Re: This MARTA Train Sounds Like An R142 |
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Posted by randyo on Tue Jun 28 16:30:00 2022, in response to Re: This MARTA Train Sounds Like An R142, posted by Allan on Tue Jun 28 10:59:32 2022. Back in old BMT days, there were 2 groups of Multis, some with GE propulsion systems and eddy current brakes in lieu of dynamic and some with WH propulsion systems and dynamic brakes. Although they did sometimes run in mixed consists, it was preferred to avoid mixing them as they did buck rather violently during braking in mixed consists. It also seems that the GE cars were better performers so during times when only a single unit was operated, operating a single WH unit was to be avoided. In later years on the IRT when mixed trains of all IRT SMEEs were operated, the older cars like the R-12s through 15s didn’t perform quite as well as the newer cars. |
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| (1605457) | |
Re: This MARTA Train Sounds Like An R142 |
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Posted by Edwards! on Tue Jun 28 17:35:13 2022, in response to Re: This MARTA Train Sounds Like An R142, posted by Jersey Mike on Tue Jun 28 11:20:04 2022. Any plan on replacing the Broad St cars with new equipment?I read about the replacement program for the street cars. The designs were so so,but an improvement over what's there now. |
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