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Post by astock5000 on May 29, 2008 18:31:59 GMT
How many D stock trains are used in service in the peaks? I want to work out if the District's Wimbledon service could be changed so more D stock and less C stock is used.
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metman
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Post by metman on May 29, 2008 18:38:16 GMT
I doubt that would be an option-I don't know the answer, but I would guess-68 trains used in the peak!
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Deleted
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Post by Deleted on May 29, 2008 19:26:29 GMT
Peak service is 77 trains. 10 are C stock, so that makes 67 D stock.
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Post by astock5000 on May 30, 2008 11:16:00 GMT
How many trains would you need to run HSK to Wimbledon, and Edgware Road to Olympia?
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Post by Deleted on May 30, 2008 18:38:14 GMT
How many trains would you need to run HSK to Wimbledon, and Edgware Road to Olympia? That depends - are you proposing to reduce the Edgware Road service to a 15 minute interval, or increase the Olympias to 10 minute intervals? |
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Post by c5 on May 30, 2008 18:43:06 GMT
How many trains would you need to run HSK to Wimbledon, and Edgware Road to Olympia? That depends - are you proposing to reduce the Edgware Road service to a 15 minute interval, or increase the Olympias to 10 minute intervals? A 4 min Erd- Oly service with stepping back of one train op at Oly and two at Erd! ;D ;D ;D ;D ;D |
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Post by astock5000 on Jun 2, 2008 16:38:55 GMT
That depends - are you proposing to reduce the Edgware Road service to a 15 minute interval, or increase the Olympias to 10 minute intervals? Increase the Olympias to 10 minute intervals. |
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Post by Deleted on Jun 2, 2008 17:31:24 GMT
Running time Wimbledon - High St about 20 minutes, say 10 minutes turnaround each end = 1 hour for a round trip = 6 trains for a 10 minute service.
Running time Olympia - Edgware Rd about 15 mins, plus 10 minutes turnaround each end = 50 mins = 5 trains for a 10 minute service.
Total 11 trains instead of the current 10.
Of course, you couldn't have a 10 minute turnaround at Olympia (single platform) if you are running a 10 minute frequency! If you squeeze the turnaround time at Olympia you would ideally increase the time at Edgware Rd to give recovery time in the event of delays, but capacity constraints at Edgware Rd make that difficult.
Theoretically, a 5 minute turnaround at each end requires only 4 trains for Olympia - Edgware Rd, but in practice would not be robust enough to cope with the usual small delays.
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Post by astock5000 on Jun 2, 2008 17:41:21 GMT
But that would use too much D stock - only 4 spare trains, and that is definately not enough with the amount of derailments D stock has in depots! You would have to reduce the frequency of the High St - Wimbledon service or run some C stock as well as D stock.
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Deleted
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Post by Deleted on Jun 2, 2008 18:00:25 GMT
Well C stock can run either of the two routes suggested, so the maximum extra D stock requirement would be one.
I personally don't advocate this pattern of service because of the problem of lack of turnaround time on an Olympia - Edgware Road service, but I thought your original idea, astock5000, was interesting enough to figure out (very roughly!) the practicalities.
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Post by c5 on Jun 2, 2008 18:03:43 GMT
Stepping back at Olympia.... GO ON ;D ;D ;D ;D ;D ;D ;D ;D ;D
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Post by astock5000 on Jun 2, 2008 18:05:21 GMT
Well C stock can run either of the two routes suggested, so the maximum extra D stock requirement would be one. But the point was to reduce the amount of C stock needed for service as there are not enough spare C stock, and this causes Circle/H&C trains to be cancelled. |
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Post by c5 on Jun 2, 2008 18:09:24 GMT
Well C stock can run either of the two routes suggested, so the maximum extra D stock requirement would be one. But the point was to reduce the amount of C stock needed for service as there are not enough spare C stock, and this causes Circle/H&C trains to be cancelled. Which nicely cover up LUL's cancellations due to [Train] Operator Not Available  |
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Post by astock5000 on Jun 2, 2008 18:13:34 GMT
And the reason why the train operator is not avaliable is brcause there is such a shortage of C stock, they can't get to Edgware Road! |
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Post by Deleted on Jun 2, 2008 21:34:17 GMT
Well C stock can run either of the two routes suggested, so the maximum extra D stock requirement would be one. But the point was to reduce the amount of C stock needed for service as there are not enough spare C stock, and this causes Circle/H&C trains to be cancelled. Well, you can't increase the service frequency without using extra trains! There would be flexibility in the C stock/D stock mix to the extent that you could have 11 C stocks, or 5 C and 6 D, or any numbers inbetween that add up to 11, but never fewer than 5 C stock. |
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Post by astock5000 on Jun 3, 2008 15:39:54 GMT
I meant use less C stock than is used at the moment on the Wimbledon to Edgware Road service, like 6 C stock and 5 D stock.
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metman
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Post by metman on Jun 3, 2008 17:07:18 GMT
D stock cannot work between High St Ken and Edgware Road!
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Post by Deleted on Jun 3, 2008 17:11:21 GMT
D stock cannot work between High St Ken and Edgware Road! Yes, but that's OK - 5 D stocks and 1 C could run the Wimbledon - High St Ken service. 5 more C stocks could run Olympia - Edgware Road. |
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metman
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Post by metman on Jun 3, 2008 18:16:13 GMT
Could go for that!
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Post by happybunny on Jun 3, 2008 23:11:35 GMT
I think they should use a 3 car train for the Olympia service
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mrfs42
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Post by mrfs42 on Jun 3, 2008 23:33:18 GMT
Hmmmm. <board convergence> Standard Stock?  |
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