Re: Amtrak near hit
Author: FUD
Date: 02-20-2021 - 18:55

Practically all electric light rail vehicles have magnetic track brakes. Normally used for emergency stops, and holding at stops. That's how they can achieve fast (~4 mphps or better) emergency stops. But if the wheel (usually disc) brakes don't have effective antilock the wheels will still lock up during maximum-effort stops, causing flat spots.

Many of SacRT's old Siemens cars have clearly audible flat spots, some of the former VTA cars too, but it's rare for a CAF car to have them. All of them have magnetic track brakes.



Subject Written By Date/Time (PST)
  Amtrak near hit 02-18-2021 - 17:46
  Re: Amtrak hit 02-18-2021 - 20:41
  Re: Yes CRU, R. 02-19-2021 - 04:42
  Re: Amtrak near hit Fred 02-19-2021 - 07:04
  Re: Amtrak near hit Wondering 02-19-2021 - 09:01
  Re: Amtrak near hit I'm also wondering 02-19-2021 - 09:34
  Re: Amtrak near hit Dr Zarkoff 02-19-2021 - 10:31
  Re: Amtrak near hit Tesla Autopiot 02-19-2021 - 11:48
  Re: Amtrak near hit FUD 02-19-2021 - 13:45
  Re: Amtrak near hit Ernest H. Robl 02-19-2021 - 19:12
  Re: Amtrak near hit Commenter 02-19-2021 - 19:28
  Re: Amtrak near hit FUD 02-20-2021 - 18:55
  Re: Amtrak near hit i hate dumb asses 02-20-2021 - 02:33


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