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Old May 17th 17, 02:17 PM posted to uk.transport.london
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Default Two-thirds of DLR fleet to be replaced

As expected, TfL has started the procurement process to replace
two-thirds of the DLR fleet (the B90, B92 and B2K sets), plus extra
stock to increase services. The 43 new generation articulated trains,
entering service from 2022, will be single 87m units, equivalent to
three of the current two-section units (which is how most DLR trains
runs now).

https://www.globalrailnews.com/2017/...railway-fleet/

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Old May 18th 17, 09:02 AM posted to uk.transport.london
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Default Two-thirds of DLR fleet to be replaced

On Wed, 17 May 2017 15:17:11 +0100
Recliner wrote:
As expected, TfL has started the procurement process to replace
two-thirds of the DLR fleet (the B90, B92 and B2K sets), plus extra
stock to increase services. The 43 new generation articulated trains,
entering service from 2022, will be single 87m units, equivalent to
three of the current two-section units (which is how most DLR trains
runs now).


Why do light rail and tram vehicles seem to have a much shorter shelf life
than heavy rail trains? Is it build quality? The DLR trains seem in fairly
good nick to me, I can't see any pressing need as a passenger for them to
be replaced.

--
Spud

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Old May 18th 17, 10:32 AM posted to uk.transport.london
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Default Two-thirds of DLR fleet to be replaced

On Wed, 17 May 2017 15:17:11 +0100, Recliner
wrote:

As expected, TfL has started the procurement process to replace
two-thirds of the DLR fleet (the B90, B92 and B2K sets), plus extra
stock to increase services. The 43 new generation articulated trains,
entering service from 2022, will be single 87m units, equivalent to
three of the current two-section units (which is how most DLR trains
runs now).

https://www.globalrailnews.com/2017/...railway-fleet/



Will they get rid of the violent shaking?

--
jhk
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Old May 18th 17, 08:02 PM posted to uk.transport.london
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Default Two-thirds of DLR fleet to be replaced

wrote:
On Wed, 17 May 2017 15:17:11 +0100
Recliner wrote:
As expected, TfL has started the procurement process to replace
two-thirds of the DLR fleet (the B90, B92 and B2K sets), plus extra
stock to increase services. The 43 new generation articulated trains,
entering service from 2022, will be single 87m units, equivalent to
three of the current two-section units (which is how most DLR trains
runs now).


Why do light rail and tram vehicles seem to have a much shorter shelf life
than heavy rail trains? Is it build quality? The DLR trains seem in fairly
good nick to me, I can't see any pressing need as a passenger for them to
be replaced.


I don't know if there are any maintenance issues with the current stock,
but having the new stock built as single articulated units increases
capacity and flexibility, allowing the attendant to access the entire
length of the train at any time.

The old DLR stock may have second-value if they're in good nick, just as
the original stock did. For example, I wonder if the T&W Metro could use
them? The current Metro stock is much older, and is due to be replaced in
a few years, just when the DLR trains could be available.

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Old May 18th 17, 11:49 PM posted to uk.transport.london
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Default Two-thirds of DLR fleet to be replaced

On Thu, 18 May 2017 20:02:59 -0000 (UTC), Recliner
wrote:

wrote:
On Wed, 17 May 2017 15:17:11 +0100
Recliner wrote:
As expected, TfL has started the procurement process to replace
two-thirds of the DLR fleet (the B90, B92 and B2K sets), plus extra
stock to increase services. The 43 new generation articulated trains,
entering service from 2022, will be single 87m units, equivalent to
three of the current two-section units (which is how most DLR trains
runs now).


Why do light rail and tram vehicles seem to have a much shorter shelf life
than heavy rail trains? Is it build quality? The DLR trains seem in fairly
good nick to me, I can't see any pressing need as a passenger for them to
be replaced.


I don't know if there are any maintenance issues with the current stock,
but having the new stock built as single articulated units increases
capacity and flexibility, allowing the attendant to access the entire
length of the train at any time.

The old DLR stock may have second-value if they're in good nick, just as
the original stock did. For example, I wonder if the T&W Metro could use
them? The current Metro stock is much older, and is due to be replaced in
a few years, just when the DLR trains could be available.



An interesting thought.
One of the 1st batch, (car no. 11?) was fitted with a pantograph for
"Metrolink publicity trails" in Manchester many years ago.

T&W 's 1.5kV operating voltage might be a problem though?

DC

---
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Old May 19th 17, 07:10 AM posted to uk.transport.london
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Default Two-thirds of DLR fleet to be replaced

On 18/05/2017 21:02, Recliner wrote:
allowing the attendant to access the entire
length of the train at any time.


Uh oh - I foresee threats of industrial action shortly (before anyone
suggests I'm being unfair, this is exactly what happened when the DLR
went to three units)
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Old May 19th 17, 07:26 AM posted to uk.transport.london
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Default Two-thirds of DLR fleet to be replaced

David C wrote:
On Thu, 18 May 2017 20:02:59 -0000 (UTC), Recliner
wrote:

wrote:
On Wed, 17 May 2017 15:17:11 +0100
Recliner wrote:
As expected, TfL has started the procurement process to replace
two-thirds of the DLR fleet (the B90, B92 and B2K sets), plus extra
stock to increase services. The 43 new generation articulated trains,
entering service from 2022, will be single 87m units, equivalent to
three of the current two-section units (which is how most DLR trains
runs now).

Why do light rail and tram vehicles seem to have a much shorter shelf life
than heavy rail trains? Is it build quality? The DLR trains seem in fairly
good nick to me, I can't see any pressing need as a passenger for them to
be replaced.


I don't know if there are any maintenance issues with the current stock,
but having the new stock built as single articulated units increases
capacity and flexibility, allowing the attendant to access the entire
length of the train at any time.

The old DLR stock may have second-value if they're in good nick, just as
the original stock did. For example, I wonder if the T&W Metro could use
them? The current Metro stock is much older, and is due to be replaced in
a few years, just when the DLR trains could be available.



An interesting thought.
One of the 1st batch, (car no. 11?) was fitted with a pantograph for
"Metrolink publicity trails" in Manchester many years ago.


The original P86 and P89 DLR trains were later fitted with pans and cabs:
https://youtu.be/hr_PtAIuD90


T&W 's 1.5kV operating voltage might be a problem though?


I'd have thought that would be easily dealt with.

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Old May 19th 17, 08:26 AM posted to uk.transport.london
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Default Two-thirds of DLR fleet to be replaced

On Fri, 19 May 2017 07:26:37 -0000 (UTC)
Recliner wrote:
David C wrote:
The old DLR stock may have second-value if they're in good nick, just as
the original stock did. For example, I wonder if the T&W Metro could use
them? The current Metro stock is much older, and is due to be replaced in
a few years, just when the DLR trains could be available.


They're the right size, but whether the geordies would want 2nd hand cast offs
from London is another matter entirely.

T&W 's 1.5kV operating voltage might be a problem though?


I'd have thought that would be easily dealt with.


If it was AC yes - you change or re-tap the transformer, job done. DC I
suspect is not so simple. I imagine a lot of the front end power electronics
would have to be replaced.

--
Spud


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Old May 19th 17, 08:32 AM posted to uk.transport.london
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Default Two-thirds of DLR fleet to be replaced

wrote:
On Fri, 19 May 2017 07:26:37 -0000 (UTC)
Recliner wrote:
David C wrote:
The old DLR stock may have second-value if they're in good nick, just as
the original stock did. For example, I wonder if the T&W Metro could use
them? The current Metro stock is much older, and is due to be replaced in
a few years, just when the DLR trains could be available.


They're the right size, but whether the geordies would want 2nd hand cast offs
from London is another matter entirely.


I don't think there's the money for an all-new fleet, and the DLR stock is
much newer than the current Metro fleet.


T&W 's 1.5kV operating voltage might be a problem though?


I'd have thought that would be easily dealt with.


If it was AC yes - you change or re-tap the transformer, job done. DC I
suspect is not so simple. I imagine a lot of the front end power electronics
would have to be replaced.


Yes, probably. They'd also have to fit driver's cabs, unless the Metro
switched to DLR-style ATO on its segregated tracks.

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Old May 19th 17, 08:55 AM posted to uk.transport.london
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Default Two-thirds of DLR fleet to be replaced

wrote:
On Wed, 17 May 2017 15:17:11 +0100
Recliner wrote:
As expected, TfL has started the procurement process to replace
two-thirds of the DLR fleet (the B90, B92 and B2K sets), plus extra
stock to increase services. The 43 new generation articulated trains,
entering service from 2022, will be single 87m units, equivalent to
three of the current two-section units (which is how most DLR trains
runs now).


Why do light rail and tram vehicles seem to have a much shorter shelf life
than heavy rail trains? Is it build quality? The DLR trains seem in fairly
good nick to me, I can't see any pressing need as a passenger for them to
be replaced.


More in this:
https://www.londonreconnections.com/2017/bakerloo-deja-vu-buying-new-trains-for-the-dlr/

It seems the trains only had a 25 year design life, are used very
intensively, and do now need structural work to stay in service:
http://www.plantengineer.org.uk/plant-engineer-news/refurbishment-underway-for-docklands-light-railway/154830/



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