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Post by foxhat on Sept 16, 2019 11:37:16 GMT
Absolutely fantastic news! Will be sad to see the 483s go but they are really in need of replacement. The re-introduction of the Brading Loop is well overdue and the investment into improving the Ryde Pier section sounds promising. I wonder if we will see a return of the second platform at Pier Head. The only strange bit is that the 484s will be 3rd rail operated. Surely that will require an overhaul of the electrical power supply systems and substation, as well as replacing the current 3rd rail alongside what I would suspect to be a 100% track renewal programme. I was suspecting to see the award based on a diesel/battery Vivarail units with the life-expired 3rd rail system being scrapped to save costs.
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Post by John tuthill on Sept 16, 2019 12:54:06 GMT
The tunnel at Ryde will have to have the track lowered at the very least, not sure about platform heights
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Post by george on Sept 16, 2019 14:13:07 GMT
A shame they are going but as foxhat says probably for the best. Last time I was in Isle of White didn't get a chance to travel on the island line.
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Post by foxhat on Sept 16, 2019 14:18:25 GMT
The tunnel at Ryde will have to have the track lowered at the very least, not sure about platform heights Vivarail say they will fit.
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Post by snowman on Sept 16, 2019 14:21:18 GMT
The tunnel at Ryde will have to have the track lowered at the very least, not sure about platform heights How tall are the class 484 (ex D stock) trains ? Ryde tunnel is partly built like a long bridge, portals are 2 single tracks with brick arch roofs, but I think it is double track in the middle. Obviously has more clearance in centre than at sides on single track tunnel sections. Historically was restricted to 3.56m (11 foot 8 inch) trains which is lower than normal by about 0.25m. In 1966-67 the base of tunnel was raised 0.25m (reducing clearance to about 3.31m). The current tube stock is only 2.88m high The other thing I am not sure about is from memory there was some sharp curves in the tunnel (and at Ryde Esplanade) so not sure what maximum length can be operated, I think the D stock driving cars are 18.37m long which is lot longer than 15.94m length of 1938 stock. Presumably someone has done (or will be doing) some accurate gauging prior to this to know what modifications will be needed. Regarding the power supplies, I wonder if an old substation (or parts of it) could be used, plenty of them have been upgraded in the London area to cope with more powerful trains. Wouldn't be new, but probably better than whats there. After electrification, in 1967 summer Saturdays multiple 7 car trains were used so was designed for much more than a pair of 2 or 4 car trains. In Southern Railway days the Island Lines typically got second hand stuff from the mainland, so just continues the practice.
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Post by John tuthill on Sept 16, 2019 14:44:07 GMT
The tunnel at Ryde will have to have the track lowered at the very least, not sure about platform heights How tall are the class 484 (ex D stock) trains ? Ryde tunnel is partly built like a long bridge, portals are 2 single tracks with brick arch roofs, but I think it is double track in the middle. Obviously has more clearance in centre than at sides on single track tunnel sections. Historically was restricted to 3.56m (11 foot 8 inch) trains which is lower than normal by about 0.25m. In 1966-67 the base of tunnel was raised 0.25m (reducing clearance to about 3.31m). The current tube stock is only 2.88m high The other thing I am not sure about is from memory there was some sharp curves in the tunnel (and at Ryde Esplanade) so not sure what maximum length can be operated, I think the D stock driving cars are 18.37m long which is lot longer than 15.94m length of 1938 stock. Presumably someone has done (or will be doing) some accurate gauging prior to this to know what modifications will be needed. Regarding the power supplies, I wonder if an old substation (or parts of it) could be used, plenty of them have been upgraded in the London area to cope with more powerful trains. Wouldn't be new, but probably better than whats there. After electrification, in 1967 summer Saturdays multiple 7 car trains were used so was designed for much more than a pair of 2 or 4 car trains. In Southern Railway days the Island Lines typically got second hand stuff from the mainland, so just continues the practice Snowman here's a comparison I know it's an 'A' but will give you some idea(not my photo) Attachment Deleted
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Post by routew15 on Sept 16, 2019 16:04:15 GMT
How tall are the class 484 (ex D stock) trains ? Ryde tunnel is partly built like a long bridge, portals are 2 single tracks with brick arch roofs, but I think it is double track in the middle. Obviously has more clearance in centre than at sides on single track tunnel sections. Historically was restricted to 3.56m (11 foot 8 inch) trains which is lower than normal by about 0.25m. In 1966-67 the base of tunnel was raised 0.25m (reducing clearance to about 3.31m). The current tube stock is only 2.88m high The other thing I am not sure about is from memory there was some sharp curves in the tunnel (and at Ryde Esplanade) so not sure what maximum length can be operated, I think the D stock driving cars are 18.37m long which is lot longer than 15.94m length of 1938 stock. Presumably someone has done (or will be doing) some accurate gauging prior to this to know what modifications will be needed. Regarding the power supplies, I wonder if an old substation (or parts of it) could be used, plenty of them have been upgraded in the London area to cope with more powerful trains. Wouldn't be new, but probably better than whats there. After electrification, in 1967 summer Saturdays multiple 7 car trains were used so was designed for much more than a pair of 2 or 4 car trains. In Southern Railway days the Island Lines typically got second hand stuff from the mainland, so just continues the practice Snowman here's a comparison I know it's an 'A' but will give you some idea(not my photo) Below is a tweet from vivarail confirming they have checked, not sure what method was used for that... Below is a detailed twitter thread on the island line gauging
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Post by george on Sept 18, 2019 8:53:38 GMT
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Post by ServerKing on Sept 22, 2019 5:42:31 GMT
Snowman here's a comparison I know it's an 'A' but will give you some idea(not my photo) Below is a tweet from vivarail confirming they have checked, not sure what method was used for that... Below is a detailed twitter thread on the island line gauging Lol at the animation... Good news, but I wonder why Vivarail changed the class number of the units as they are the same as the ex D Stock units introduced on the Marston Vale line? I think they have had issues with flooding in some of the tunnels, so I assume they will tackle this as they lower the track bed. The new trains will be faster than the 1938 stuff which has done incredibly well in a tough environment with all that salty air. They could do with extending the line or adding new routes to places like Newport, Totland and Freshwater Bay I used to visit the island as a kid on a Bristol single decker bus (LH?) As well as the older VR's with Southern Vectis It would help with tourism as after October the place does go to sleep until around April / May... at least one part of SWR isn't plagued by problems
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Post by YY13VKP on Sept 22, 2019 8:07:41 GMT
Below is a tweet from vivarail confirming they have checked, not sure what method was used for that... Below is a detailed twitter thread on the island line gauging Lol at the animation... Good news, but I wonder why Vivarail changed the class number of the units as they are the same as the ex D Stock units introduced on the Marston Vale line? I think they have had issues with flooding in some of the tunnels, so I assume they will tackle this as they lower the track bed. The new trains will be faster than the 1938 stuff which has done incredibly well in a tough environment with all that salty air. They could do with extending the line or adding new routes to places like Newport, Totland and Freshwater Bay I used to visit the island as a kid on a Bristol single decker bus (LH?) As well as the older VR's with Southern Vectis It would help with tourism as after October the place does go to sleep until around April / May... at least one part of SWR isn't plagued by problems They changed the class name only because these will remain as electric trains only, not a DEMU or a Bi Mode
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Post by snowman on Sept 23, 2019 12:33:29 GMT
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Post by thewintersoldier on Sept 27, 2019 23:27:50 GMT
The remains of a sofa that magically landed in front of me at Vauxhall earlier in my shift. A nice leaving present for me
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Post by 725DYE on Sept 28, 2019 11:55:10 GMT
The remains of a sofa that magically landed in front of me at Vauxhall earlier in my shift. A nice leaving present for me Was this the "obstruction on the line" that resulted in yet another shambolic suburban service yesterday? Had to wait over half-an hour for a train to Epsom at Wimbledon yesterday evening with a couple running fast. Totally unacceptable again SWR......
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Post by thewintersoldier on Sept 28, 2019 14:39:50 GMT
The remains of a sofa that magically landed in front of me at Vauxhall earlier in my shift. A nice leaving present for me Was this the "obstruction on the line" that resulted in yet another shambolic suburban service yesterday? Had to wait over half-an hour for a train to Epsom at Wimbledon yesterday evening with a couple running fast. Totally unacceptable again SWR...... I agree mate: how dare the sofa spawn itself onto the railway and how dare the driver not stop in time
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Post by snoggle on Sept 28, 2019 14:41:25 GMT
The remains of a sofa that magically landed in front of me at Vauxhall earlier in my shift. A nice leaving present for me Leaving present? Where are you off to?
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