05-21-2019, 09:08 PM
(05-21-2019, 08:43 PM)ijmorlan Wrote:(05-21-2019, 08:08 PM)ert86 Wrote: Hmmm, the other day I heard one making an unusual amount of loud clunking noises heading south across Columbia. I was all the way at Phillip, far enough that normally I'd only know it's passing because of the crossing signals
I saw one a week or two ago heading south near the University. It was making a repetitive clunking sound, something like what I imagine a wheel with a flat in it might sound like. Not sure if we both heard the same thing. I don’t know much about the details but I know wheels can develop flats due to excessive braking — if the wheel locks up during braking, then a single point on the circumference slides along the track, and it doesn’t take much wear under that circumstance to take the wheel out of circular.
Wheel flats are quite common during the testing, training and commissioning phase of a new system.