Fahad
In memoriam
Posts: 459 
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Post by Fahad on May 31, 2012 0:16:32 GMT
While such information isn't published, AFAIA, it is obviously held, as RAIB refer to depths in reports, where relevant. An example of such a report is that on the runaway train on the Northern [1]. Section 17 has this nice gradient profile:  Highgate to Archway appears to be exactly 1km, and almost a 30m drop - just over 1 in 30. [1] www.raib.gov.uk/cms_resources.cfm?file=/110615_R092011_Highgate.pdf |
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mrfs42
71E25683904T 172E6538094T
Big Hair Day
Posts: 5,922
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Post by mrfs42 on May 31, 2012 0:42:54 GMT
This works out at about 1 in 30 which seems rather steep. Not for an electrically powered railway with motors spread throughout the train and having a good adhesive weight. Does anyone know of a gradients like this on the tube (or comparable metro systems). I in 30: Lambeth North - London Road Depot; departure from every former CLR station; somewhere I've got the notes of the gradients in the FP area up from Drayton Park. Stratford is something like 1 in 31. |
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Post by torquewrench on May 31, 2012 1:50:59 GMT
Whats Chesham - Chalfont south?
1 in 28 between Bow Road and Bromley by Bow
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Post by metrailway on May 31, 2012 8:33:28 GMT
Whats Chesham - Chalfont south? 1 in 28 between Bow Road and Bromley by Bow Chesham to Chalfont has a rising 1 in 66 gradient in the SB direction but it is sustained for 110 chains (~1.38 miles). Most of the Met between Ricky and Amersham is 1 in 105 rising in the NB direction. The up line on the W&C has a falling 1 in 30 gradient from Waterloo to Bank for 900 feet Approaches to stations on the Jubilee between Bond St and Charing Cross range from 1 in 47 to 1 in 55. Don't have information on the JLE. |
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mrfs42
71E25683904T 172E6538094T
Big Hair Day
Posts: 5,922
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Post by mrfs42 on May 31, 2012 11:05:45 GMT
Highgate - Archway is 1 in 50, both roads.
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Post by nickf on Jun 1, 2012 8:14:16 GMT
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castlebar
Planners use hindsight, not foresight
Posts: 1,316
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Post by castlebar on Jun 1, 2012 11:17:00 GMT
There was a question on another thread recently about a "spectacle cab". This photo seems to show something that l didn't know existed, a "double spectacle cab" with one at the back of and one at the front of the footplate. Please correct me if l am wrong.
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Post by nickf on Jun 1, 2012 12:12:52 GMT
Some of the Met Tank clones built for the LNWR had weatherboards (spectacle plates) at the back of the bunker as well as ahead of the footplate. They were used for the Outer Circle route from Broad Street round to Mansion House - among other duties. Webb even modified one into a compound!
Modified after looking closely at photos!
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Post by phillw48 on Jun 1, 2012 14:26:13 GMT
IIRC one of the MET 'A' class was sold to the Mersey Railway. A similar six coupled locomotive was considered by the MET but the steep inclines making the need for such a locomotive necessary did not appear.
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Post by nickf on Jun 1, 2012 14:49:20 GMT
In 1907 No. 61 was sold to the Mersey Railway. It was scrapped in 1925 and replaced by No. 7, which had just been sold to Fraser for scrap. No. 7 lasted until 1943 when it was withdrawn.
Source: 'The Met Tanks' by Brian Reed.
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Deleted
Deleted Member
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Post by Deleted on Jun 1, 2012 20:00:25 GMT
Does anyone know what the gradient is for the incline for the underpass from High Street Kensington into Earl's Court? I heard about a BR track recording train getting stopped at a singal on the incline and it was unable to climb the gradient from a standstill, even with the driver standing on the DEMU's external throttle/linkage to get some extra revs out of the engine.
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mrfs42
71E25683904T 172E6538094T
Big Hair Day
Posts: 5,922
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Post by mrfs42 on Jun 1, 2012 23:32:34 GMT
Does anyone know what the gradient is for the incline for the underpass from High Street Kensington into Earl's Court? I heard about a BR track recording train getting stopped at a singal on the incline and it was unable to climb the gradient from a standstill,l even with the driver standing on the DEMU's external throttle/linkage to get some extra revs out of the engine. From the 'summit' just outside ED IMR: 1 in 122 down, 1 in 62 down, 1 in 41 down, level underneath the other tracks, 1 in 41½ up, 1 in 63 up, 1 in 717 up and level into ECt platforms. Must have been held at EC 36 A on the 1 in 41½. |
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Deleted
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Post by Deleted on Jun 3, 2012 5:10:01 GMT
The steepest gradients I can think of on the underground are, and this is by sight only:-
From the tunnel mouth at East Finchley to the station, this is steeper than any of the underground sections
Both sides of the dip at Harrow, Uxbridge branch, and climbing out of Uxbridge station, which has caused problems because of pointwork and gaps in juice rails.
When on the 59 stock on the northern line I often wondered what would happen in case of a power failure as the handbrakes were not considered adequate to hold trains overnight on depot roads, although to the naked eye most appeared flat. Rail anchors and/or scotch blocks had to be used on some roads. The Westinghouse brake used to bleed off in about an hour and I am sure that however tightly the haddbrakes were applied they would not have secured a train on those hills.
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Post by bruce on Jun 3, 2012 20:56:10 GMT
Was it a '59 stock that went for a night time trip on the Bakerloo many years ago?
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Deleted
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Post by Deleted on Jun 6, 2012 19:58:07 GMT
I think it was around 1984, when a 1959 train on the Bakerloo, rolled down the gradient to the Dip around Regents Park, when the handbrakes were not quite secured enough or something like that...
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