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| Re: Why Do I Call It Bullshit? (1645365) | |||
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Re: Why Do I Call It Bullshit? |
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Posted by Stephen Bauman on Sun Nov 23 22:36:06 2025, in response to Why Do I Call It Bullshit?, posted by TRAIN DUDE on Sun Nov 23 20:21:46 2025. The news articles stated that NYCT had tested the wheels and tracks against spec and found them within spec. They never considered whether the specification was correct.In the 1990s the TA switched to ring damped wheels. Thanks for this insight. This may or may not be what's wrong with the spec. Further tests are required. Truck design for the R160's is a lot different from pre-1990 equipment. There may be lots of other suspects. They found that by reducing speeds, in some cases by just 5 MPH, the wheel wear issue was solved. This should be a quick and temporary solution to prevent the situation from getting worse. However, reducing speed should never be considered a permanent solution. The still need to find out why the new equipment does not perform as well as older equipment on these curves. They might have found a design fault to be the cause. The MTA might be hiding that finding to prevent more engineering competence questions from being raised. There was a similar situation with the Williamsburg Bridge crash. The emergency brake operated at half their spec. The MTA's solution was to slow down all trains to match their inferior brakes. |
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