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Post by Dstock7080 on Dec 31, 2015 18:47:42 GMT
Anyone know why virtually all the D stock being withdrawn are single ended units, virtually all the Double enders remain meaning virtually every train has a Double ended unit now? Although being the oldest in service they are most useful, can be placed at either end of a 6-car train, to replace a dud single-ended. |
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Deleted
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Post by Deleted on Dec 31, 2015 18:47:43 GMT
Out of the 20 double enders, only three have been disposed of. However, even with 17 left, and assuming that they were all available for service (probably unlikely) there would still be plenty of D Stock formed of two single ended units. Maybe 50/50?
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Deleted
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Post by Deleted on Dec 31, 2015 18:48:39 GMT
And as DStock7080 says, good for operational flexibility.
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rincew1nd
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Post by rincew1nd on Dec 31, 2015 18:50:29 GMT
Maximum flexibility perhaps?
Withdrawing double enders first means that you then have to balance almost exactly the disposals of east and west facing units; keeping the double enders means that there is less need to keep the east/west balance exactly right. Or maybe the single enders are just more worn out than the double ones?
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Deleted
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Post by Deleted on Dec 31, 2015 19:12:47 GMT
Although being the oldest in service they are most useful, can be placed at either end of a 6-car train, to replace a dud single-ended. Lots of double enders have dead middle cabs now with missing drivers seats and PA equipment so this flexibility has gone anyway. That is not strictly true. There are one or two double ended trains that are to be used solely as a East or west end only, but this is down to other factors and are probably the three that have been disposed of. Middle cabs with pa equipment or seats or other token things missing are not dead l, inflexible cabs. if they need to reform it as a main cab, they either just fit the parts needed from stores or swap them from the other cab. So the flexibility is still there, it just takes slightly longer to reform the train |
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Post by br7mt on Jan 1, 2016 14:27:11 GMT
It was exactly the same with 67TS withdrawal - the double ended units tended to last longer and the final train plus remainders were all double enders.
Regards,
Dan
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metman
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Post by metman on Jan 1, 2016 15:12:27 GMT
And also the case with the A60 stock....
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Post by t697 on Jan 1, 2016 16:35:06 GMT
It was exactly the same with 67TS withdrawal - the double ended units tended to last longer and the final train plus remainders were all double enders. Regards, Dan D78 Double Enders are slightly longer than Single Enders, so if you couple two together, it can cause difficulty sighting platform OPO when changing ends. For that reason it's been traditional not to run trains of two Double Enders if possible. |
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