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Post by hba135 on Sept 22, 2005 20:57:11 GMT
hi all, this must be my 2nd post overall on this forum, i hope i'm not drifting off this topic, but i was courious and wanted to know if Chiltern Class 168's were ever fited with tripcock to run on the metropolitan mainline so they could do Marylebone to Alyesbury services. I havan't seen a 168's on alyesbury services yet and thought that only the chiltern 165's were fitted with tripcock.
my simple question is: were Chiltern trains class 168's ever fitted with tripcock to run on the Metropolitan mainline?
from HBA135
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Post by Harsig on Sept 23, 2005 9:05:26 GMT
hi all, this must be my 2nd post overall on this forum, i hope i'm not drifting off this topic, but i was courious and wanted to know if Chiltern Class 168's were ever fited with tripcock to run on the metropolitan mainline so they could do Marylebone to Alyesbury services. I havan't seen a 168's on alyesbury services yet and thought that only the chiltern 165's were fitted with tripcock. my simple question is: were Chiltern trains class 168's ever fitted with tripcock to run on the Metropolitan mainline? from HBA135 The simple answer is yes they are. They are regularly seen on the Met, often because it is the easiest way to transfer them between Aylesbury Depot and Marylebone. The recent closure of the line at Gerrards Cross, following the Tesco's tunnel collapse, made their appearance on the Met very common indeed. |
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Post by Deleted on Sept 23, 2005 22:02:39 GMT
my simple question is: were Chiltern trains class 168's ever fitted with tripcock to run on the Metropolitan mainline? Yes. 168s are seen on the met quite often now, especially the 168/2s which used frequently on the stopping services. |
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Post by Deleted on Oct 6, 2005 0:21:13 GMT
Greetings and Welcome, All Chilterns 165s & 168s are fitted with tripcocks, as are Chilterns Sandite " Heritage " DMUs, which you'll see out and about over the coming weeks i dare say. Chiltern did inherit a 165unit from FirstGreatWesternLink recently(well, within a year), and because it had no tripcock, it was split and coupled cab to cab inside a chiltern 165, so the lack of tripcock(s) was'nt a problem. I'm sure someone around here's got a picture of the strange combo.... Hope that tells you all you ever wanted to know about the subject. Charmed Phil www.ginstersrailwayphotos.fotopic.net/ |
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Post by Deleted on Oct 6, 2005 23:34:17 GMT
All Chilterns 165s & 168s are fitted with tripcocks, as are Chilterns Sandite " Heritage " DMUs, which you'll see out and about over the coming weeks i dare say. Yes however due to the sequential signalling that comes into action, Trains formed only of one car are permitted to reverse at South to North at Amersham. These trains are not permitted south of Amersham as the Certificate of Technical Conformance for Rolling Stock requires that the minimum length of the train be more than two cars. |
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Post by Deleted on Oct 7, 2005 9:16:29 GMT
What is "sequential" signalling? I can understand that a 1-car train would be too short to drop track circuits and the like, but I've never heard of anything called "sequential" signalling.
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Post by Harsig on Oct 7, 2005 9:48:11 GMT
What is "sequential" signalling? I can understand that a 1-car train would be too short to drop track circuits and the like, but I've never heard of anything called "sequential" signalling. Basically with sequential signalling, the signalling system monitors the track circuits to see that they drop and pick up in the correct sequence. If they don't the system trips out and the signals remain at danger even if the track circuits are clear. The idea is guard against trains failing to operate the track circuits and in the case of Rickmansworth to Amersham this situation sometimes arises during the leaf fall season, when the leaf mulch on the rail head, in addition to reducing adhesion is also an effective insulation between wheel and rail. Obviously the shorter the train the greater the risk of the train disappearing completely from the signalling system hence the ban on single car trains. |
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Post by Deleted on Oct 7, 2005 11:48:27 GMT
Ah, I see now. This sounds a bit like the 14X+15X combos that are seen in the north during leaf-fall, because the Pacers are too short and too light to drop track circuits  At least this explains why all of the Chiltern bubbles that run onto the Met (i.e. the water cannon and Sandite bubbles) are two cars or more. |
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Post by Deleted on Oct 10, 2005 9:56:14 GMT
At least this explains why all of the Chiltern bubbles that run onto the Met (i.e. the water cannon and Sandite bubbles) are two cars or more. That 'ran' on the met. Single car trains were allowed last year. |
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Post by Deleted on Oct 10, 2005 17:40:30 GMT
At least this explains why all of the Chiltern bubbles that run onto the Met (i.e. the water cannon and Sandite bubbles) are two cars or more. That 'ran' on the met. Single car trains were allowed last year. Which bubble do you mean? All of the leaf fall bubble car formations that I have personally seen appear to be three cars; I saw the Sandite train blasting the down GW&GC at Risborough a few years ago, and it was three cars (and in a nice GW livery too!). Are you referring to the Heritage Bubble? |
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Post by Deleted on Oct 10, 2005 18:06:12 GMT
Which bubble do you mean? All of the leaf fall bubble car formations that I have personally seen appear to be three cars; I saw the Sandite train blasting the down GW&GC at Risborough a few years ago, and it was three cars (and in a nice GW livery too!). Are you referring to the Heritage Bubble? Chiltern have more than one sandite / water jetting bubble car. There at least three, one being green, another yellow and another maroon, i believe there is anotehr one also. The green one is 3 cars, and the other two I believe are single cars. Last year all of them were alowed onto LUL, this year only those that are 2 cars or more can run. |
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