|
|
Post by superteacher on Mar 5, 2018 21:50:14 GMT
Are these the only air operated points on the Central line? Why were they not converted to electric when the line was upgraded?
|
|
|
|
Post by bananaman on Mar 5, 2018 22:03:16 GMT
There are air-worked points on the Central line at Queensway, Marble Arch, Liverpool St and Bethnal Green. Until fairly recently there was also Holborn. When the line was resignalled, M63 electric point machines were installed in the outside sections, but there's no room for them in the tunnel section. In the last few years a new electric machine, the Surelock, has been designed to be used in the tunnel sections.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 6, 2018 2:27:13 GMT
Not all outside points were M63’s where you had 4ft EP points the air motor was replaced with one that worked with hydraulics. This was not done down the tunnel areas as hydraulic oil is flammable and poses a greater risk.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 6, 2018 2:30:28 GMT
Surelock was not designed as a bespoke tunnel machine it’s just a newer version of the M63 which uses all the same circuitry and ground connections .
We have them in outside locations and tunnel areas and they work once set up correctly quite well even though a few issues have arisen since there introduction onto LU well the Northern line had them first and suffered from some catastrophic failures.
|
|
North End
Beneath Newington Causeway
Posts: 1,769
|
Post by North End on Mar 6, 2018 3:17:17 GMT
Surelock was not designed as a bespoke tunnel machine it’s just a newer version of the M63 which uses all the same circuitry and ground connections . We have them in outside locations and tunnel areas and they work once set up correctly quite well even though a few issues have arisen since there introduction onto LU well the Northern line had them first and suffered from some catastrophic failures. Indeed, I remember Edgware was horrendously unreliable at one point - it was a standing joke that they failed if the weather was too hot, too cold, too wet or too windy. To be fair they're fine nowadays. |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 6, 2018 3:18:51 GMT
Should be now they are on version H they originally had version A
|
|
|
|
Post by principlesdesigner on Mar 6, 2018 7:37:53 GMT
Not all outside points were M63’s where you had 4ft EP points the air motor was replaced with one that worked with hydraulics. This was not done down the tunnel areas as hydraulic oil is flammable and poses a greater risk. I thought that BEG had an EH power-pack but I could well be wrong |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 6, 2018 17:48:00 GMT
Wouldn’t know I’m not from the central line I know Marble Arch are still air worked well (chairlocks) we’re about 3 years when I done a site visit
|
|
|
|
Post by bananaman on Mar 7, 2018 5:35:07 GMT
Not all outside points were M63’s where you had 4ft EP points the air motor was replaced with one that worked with hydraulics. This was not done down the tunnel areas as hydraulic oil is flammable and poses a greater risk. I thought that BEG had an EH power-pack but I could well be wrong One end at Bethnal Green was converted to Surelocks (electric) a few years ago. There's never been an EH unit there. |
|
|
|
Post by bananaman on Mar 7, 2018 5:37:04 GMT
Wouldn’t know I’m not from the central line I know Marble Arch are still air worked well (chairlocks) we’re about 3 years when I done a site visit All ends at Marble are EP Four Foots, and have been for many years. I think there were clamplocks there before the resignalling. |
|
|
|
Post by principlesdesigner on Mar 7, 2018 5:55:58 GMT
I thought that BEG had an EH power-pack but I could well be wrong One end at Bethnal Green was converted to Surelocks (electric) a few years ago. There's never been an EH unit there. I must have been dreaming then! I was sure that the EH was tried in "the hole" somewhere. I do recall the Surelock conversion vaguely |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 7, 2018 6:20:37 GMT
Don’t remember the central having clamplocks at all
|
|
|
|
Post by principlesdesigner on Mar 7, 2018 7:41:24 GMT
Don’t remember the central having clamplocks at all There were a few - WER and some of the sites in the east which had early M63 replacements |
|
|
|
Post by countryman on Mar 7, 2018 8:54:20 GMT
Don’t remember the central having clamplocks at all There were a few - WER and some of the sites in the east which had early M63 replacements Sorry, I know these acronyms are generally station codes and I can usually figure them out, but I can't get WER! |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 7, 2018 8:57:25 GMT
Wouldn’t have a clue
Come the 4LM upgrade SSL are getting 4 letter codes to make things worse
|
|
|
|
Post by norbitonflyer on Mar 7, 2018 9:26:58 GMT
There were a few - WER and some of the sites in the east which had early M63 replacements Sorry, I know these acronyms are generally station codes and I can usually figure them out, but I can't get WER! I would hazard a guess at West Ruislip |
|
|
|
Post by countryman on Mar 7, 2018 13:05:06 GMT
Sorry, I know these acronyms are generally station codes and I can usually figure them out, but I can't get WER! I would hazard a guess at West Ruislip Makes sense! I was trying to find somewhere at the east end of the line! |
|
|
|
Post by norbitonflyer on Mar 7, 2018 13:45:32 GMT
I would hazard a guess at West Ruislip Makes sense! I was trying to find somewhere at the east end of the line! Then he would have said "and some other sites...." rather than "and some of the sites......" |
|
|
|
Post by domh245 on Mar 7, 2018 13:52:05 GMT
I would hazard a guess at West Ruislip Makes sense! I was trying to find somewhere at the east end of the line! As I understand it, the rule when it comes to Central Line station abbreviations is the first 3 letters if the station name is a single word (eg HAI = Hainult), and then if 2 words long, the first 2 letters are the first 2 of the first word, and the last letter is the first letter of the second word (eg SHB = Shepards Bush). I think that for the 3 word stations, they just use the first letter of each word (eg TCR = Tottenham Court Road) |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 7, 2018 15:17:18 GMT
Makes sense! I was trying to find somewhere at the east end of the line! As I understand it, the rule when it comes to Central Line station abbreviations is the first 3 letters if the station name is a single word (eg HAI = Hainult), and then if 2 words long, the first 2 letters are the first 2 of the first word, and the last letter is the first letter of the second word (eg SHB = Shepards Bush). I think that for the 3 word stations, they just use the first letter of each word (eg TCR = Tottenham Court Road) Exactly that, only exception being Leytonstone is LES as LEY is taken by Leyton |
|
|
|
Post by bananaman on Mar 7, 2018 16:15:01 GMT
As I understand it, the rule when it comes to Central Line station abbreviations is the first 3 letters if the station name is a single word (eg HAI = Hainult), and then if 2 words long, the first 2 letters are the first 2 of the first word, and the last letter is the first letter of the second word (eg SHB = Shepards Bush). I think that for the 3 word stations, they just use the first letter of each word (eg TCR = Tottenham Court Road) Exactly that, only exception being Leytonstone is LES as LEY is taken by Leyton The only other exception being REB for Redbridge, as the abbreviation RED would have led to confusion  |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 7, 2018 19:10:37 GMT
Exactly that, only exception being Leytonstone is LES as LEY is taken by Leyton The only other exception being REB for Redbridge, as the abbreviation RED would have led to confusion Oh yeah! I'd forgotten about that one! So that's why! I can see that now, I always wondered. |
|
|
|
Post by principlesdesigner on Mar 8, 2018 0:18:15 GMT
There were a few - WER and some of the sites in the east which had early M63 replacements Sorry, I know these acronyms are generally station codes and I can usually figure them out, but I can't get WER! Sorry WEst Ruislip |
|
