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Post by kdotj on Feb 12, 2012 1:25:27 GMT
Hey all, One of my friends posted the following image on Facebook, with the caption "Train spilt in two"  Now I'm assuming this isn't what happened, by the fact that the visible end has its tail lights on and the DMI showing the destination. That's just a guess... but also the fact I've never seen a Central Line train with two end cars face to face in the middle like that. So what happened here? I didn't think trains could become that close? |
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mrfs42
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Post by mrfs42 on Feb 12, 2012 2:37:25 GMT
So what happened here? I didn't think trains could become that close? Unusual. I'm sure there'll be an explanation somewhere. I have seen trains with a lot (an *awful* lot, TBH) more momentum slightly closer together, but not by much. All done perfectly safely and in accordance with the Rules. FWIW, I don't think either train is stationary; nor has safety been compromised. |
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Post by reganorak on Feb 12, 2012 6:52:29 GMT
Assuming the photo was taken on 10 February, it was during the 'defective train' incident at Bank (service suspended 19.15 to 20.15). The incident train was EB set 11. EB train 14 was stalled behind and authorised forward to detrain its passengers onto the platform. Hence the two close together - all done within the rules.
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Post by aslefshrugged on Feb 12, 2012 8:32:24 GMT
Definitely not a "train split in two" - there are no trains put together with two "A" (cab) cars in the middle. Tell your mate he's wrong.
Reganorak is right, we can do this in Restricted Manual, max speed 14kph
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Post by Guest on Feb 12, 2012 8:44:01 GMT
Do you know why occasionally there are 3rd car cabs?
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Post by aslefshrugged on Feb 12, 2012 9:12:39 GMT
Not a clue, I just drive 'em, I don't put 'em together in the depot. There's only about 4 or 5 out there and they are all made up of 3 a/b units with a c/b, none with all four units a/b
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Post by dave72 on Feb 12, 2012 11:56:17 GMT
In normal service conditions are trains ever seen with the tail end of one leaving a platform and the next one's front car coming into the station on the lines that run in auto mode, thanks?
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Post by Guest on Feb 12, 2012 12:01:39 GMT
No, but at Leyton it is possible to see the next train coming (a fair way in the distance might I add) with one in the platform in the peaks.. or the one you just missed..
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Post by aslefshrugged on Feb 12, 2012 12:12:14 GMT
No, you'll always have a train's length between the two, ATP (Auto or CM) will not allow the train behind to enter the track circuit ahead if its not clear, it will stop you at the BMB.
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Post by norbitonflyer on Feb 12, 2012 14:26:10 GMT
Do you know why occasionally there are 3rd car cabs? I understand from articles written at the time that an excess of a/b units compared with c/b was provided to allow some operational flexibility - an a/b can deputise for a c/b in the middle of a train but a c/b cannot be on the end. I would assume that having a train of four a/b units is avoided because it reduces passenger space. Even if one were formed, there is only a 1 in 4 chance the cabs would be together - the middle units could both be facing the same way, or back to back - and the face to face situation is probably best avoided as it would result in a long section in the middle of the platforms with no entrance to the train. But it was certainly possible - I have a photo of an eight car train of W&C stock, under test on the Central - obviously there have to be two cabs together in the middle of that formation! |
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Chris M
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Post by Chris M on Feb 12, 2012 14:45:28 GMT
No, but at Leyton it is possible to see the next train coming (a fair way in the distance might I add) with one in the platform in the peaks.. or the one you just missed.. It gets closer than that at Stratford eastbound in the peaks sometimes. There the rear of the first train is between the platform and the tunnel, while the front of the second train is between the tunnel and the platform at the other end of the station. |
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Post by Guest on Feb 12, 2012 15:46:18 GMT
I did not reailise that trains could get so close to each other on a fixed block signaling system?
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Post by Guest on Feb 12, 2012 17:48:52 GMT
Yes, they can and I have seen it..train in the EB at Stratford, Both the next trains displayed as 1min on the DMI. Thick and fast they came, like Chris said front and rear between tunnel and platform.
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Post by Guest on Feb 12, 2012 19:14:34 GMT
Is it just the ATO lines which can get this close?
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Post by tomgholmes on Feb 12, 2012 19:54:33 GMT
I did not reailise that trains could get so close to each other on a fixed block signaling system? The trains safety systems would have to be turned off, so restricted manual selected, then there is no limits to how close you can get. Nothing to stop conventionally signaled lines doing this, I don't know if there's a tripcock override or similar, or whether the train just gets tripped and restarts. |
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