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Old 21st February 2018, 08:46
Beeyar Wunby's Avatar
Beeyar Wunby Beeyar Wunby is offline  
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Join Date: Dec 2012
Location: NW Norfolk
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Hi A/S, been reading this thread with interest.

Buffer stop collisions are always a bit of a mystery.

Quote:
A number of trains have hit this buffer stop previously, especially during wet weather.
An 8 car train does not have much spare platform space prior to this buffer stop.
Plus, the track dives down a 1 in 77 grade just prior to arriving at the station, so approach speed can be affected.
Railways always allow these risky operating conditions to continue, and then get all snotty when the inevitable happens.

We have an underground section here in London called the Northern City Line. It's worked by main line trains but used to be part of the London tube system. In winter it suffers from low adhesion problems just like everywhere else, because unlike the old slam door stock of old there aren't brake blocks rubbing on the tire. Modern disk and dynamic brakes don't clean the wheel, so the trains take their leaf contamination down there with them.

The public can't believe that there can be station overruns on an underground system, but we know better.

Fortunately the approach to the terminus (Moorgate) reduces from 30 through 20, to 10mph (16kph). After the horrendous end-wall collision in 1975 (linky here...Moorgate disaster) they put in 3 timed train stops and a fixed train stop at the platform end. That seems to have sorted it....hopefully.

BW
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