by ExCon90
I never heard the gauge is narrower than the standard 1435 mm. What was the reason for that?
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YOLO wrote: ↑Tue Oct 19, 2021 11:16 am so the rail guage on our system is 1429in and not the stand 1435in, could that be at play here?You mean mm, not inches. 1435 mm, not 119 feet 7 inches... or "football stadium gauge". Nobody uses football stadium gauge for railroad operations (maybe operations of retractable roofs on football stadiums).
Sand Box John wrote: ↑Wed Oct 20, 2021 9:52 am ExCon90I hear that the tighter gaugue is beyond the tolerances of standard gauge rail. Anyone know of the tolerances?
I never heard the gauge is narrower than the standard 1435 mm. What was the reason for that?
The track gauge is narrower by 1/4" 6.35mm. The wheel sets are standard gauge. The reason is to reduce the lateral movement of truck (hunting) at speed on tangent track.
Sand Box John wrote: ↑Wed Oct 20, 2021 9:52 am ExCon90Thanks for actually answering my question. Have other railways around the world had trouble with hunting on straight track by wheelsets that match the track gauge, or was WMATA's original decision based on speculation by someone who was new to the business? Or is it standard industry practice which somehow never gets mentioned?
I never heard the gauge is narrower than the standard 1435 mm. What was the reason for that?
The track gauge is narrower by 1/4" 6.35mm. The wheel sets are standard gauge. The reason is to reduce the lateral movement of truck (hunting) at speed on tangent track.
Metro pulled some old 2000s and also 6000s that were undergoing repairs.It sure looks like it is faster to fix the 6000's than to get new wheelsets for the 7000's. I'm surprised that WMATA has not given that aspect more publicity; that they haven't makes me think they are behind the curve on accomplishing the 6000 repairs.
farecard wrote: ↑Fri Oct 22, 2021 11:13 amThe 6000 series were pulled last year due to decoupling problems In late Sep 2021, Metro began to gradually bring them back in service after they were fixed. This means only a small amount of 6000 series cars are back in service. The 6000 series cars were mainly on the red lineMetro pulled some old 2000s and also 6000s that were undergoing repairs.It sure looks like it is faster to fix the 6000's than to get new wheelsets for the 7000's. I'm surprised that WMATA has not given that aspect more publicity; that they haven't makes me think they are behind the curve on accomplishing the 6000 repairs.
Metro began to gradually bring them back in service after they were fixed. This means only a small amount of 6000 series cars are back in serviceExactly my point.