On Jun 27, 11:18 am, John B wrote:
On Jun 27, 10:07 am, Kev wrote:

So why are there signal failures on the less than 10 years old Jubilee
Line extenstion or the less than 30 year old Jubilee Line or the less
than 50 years old Victoria Line. I thought it was all due to the aging
Victorian infrastructure. It doesn't seem reasonable to blame Metronet/
Tubelines for the **** that they inherited, even if they should have
known what they were letting themselves in for.

Scientifically speaking, when you're talking about complex
electromechanical systems like train signalling, 30 years and 50 years
is Pretty Damn Old.

I notice that you didn't mention the less than 10 year old Jubilee
Line extension. I accept that the Victoria Line signalling is probably
knackered I just wish that all concerned would stop going on how the
probelms are all due to the "Victorian" infrastructure. The DLR is
hardly Victorian and the signalling and all the trains have been
replaced since it was built.
I can't wait for the first signal failure on the new Westinghouse
system on the Victoria Line and on the new Thales system on the
Jubilee Line.

Kevin

On Jun 27, 2:43 pm, Kev wrote:
On Jun 27, 11:18 am, John B wrote: On Jun 27, 10:07 am, Kev wrote:

So why are there signal failures on the less than 10 years old Jubilee
Line extenstion or the less than 30 year old Jubilee Line or the less
than 50 years old Victoria Line. I thought it was all due to the aging
Victorian infrastructure. It doesn't seem reasonable to blame Metronet/
Tubelines for the **** that they inherited, even if they should have
known what they were letting themselves in for.

Scientifically speaking, when you're talking about complex
electromechanical systems like train signalling, 30 years and 50 years
is Pretty Damn Old.

I notice that you didn't mention the less than 10 year old Jubilee
Line extension. I accept that the Victoria Line signalling is probably
knackered I just wish that all concerned would stop going on how the
probelms are all due to the "Victorian" infrastructure. The DLR is
hardly Victorian and the signalling and all the trains have been
replaced since it was built.
I can't wait for the first signal failure on the new Westinghouse
system on the Victoria Line and on the new Thales system on the
Jubilee Line.

Kevin

But lots of the newer kit is bolted on to or "talks to" the Victorian
or kit from the 20's-60's!

There will be problems with the new stuff, as it won't be built to
last....

On Jun 27, 3:48 pm, chunky munky
wrote:
On Jun 27, 2:43 pm, Kev wrote:





On Jun 27, 11:18 am, John B wrote: On Jun 27, 10:07 am, Kev wrote:

So why are there signal failures on the less than 10 years old Jubilee
Line extenstion or the less than 30 year old Jubilee Line or the less
than 50 years old Victoria Line. I thought it was all due to the aging
Victorian infrastructure. It doesn't seem reasonable to blame Metronet/
Tubelines for the **** that they inherited, even if they should have
known what they were letting themselves in for.

Scientifically speaking, when you're talking about complex
electromechanical systems like train signalling, 30 years and 50 years
is Pretty Damn Old.

I notice that you didn't mention the less than 10 year old Jubilee
Line extension. I accept that the Victoria Line signalling is probably
knackered I just wish that all concerned would stop going on how the
probelms are all due to the "Victorian" infrastructure. The DLR is
hardly Victorian and the signalling and all the trains have been
replaced since it was built.
I can't wait for the first signal failure on the new Westinghouse
system on the Victoria Line and on the new Thales system on the
Jubilee Line.

Kevin

But lots of the newer kit is bolted on to or "talks to" the Victorian
or kit from the 20's-60's!

There will be problems with the new stuff, as it won't be built to
last....- Hide quoted text -

- Show quoted text -

Not on the Jubilee Line and that still gets problems.

Kevin

On 28 Jun, 08:31, Kev wrote:
But lots of the newer kit is bolted on to or "talks to" the Victorian
or kit from the 20's-60's!


Not on the Jubilee Line and that still gets problems.


Err, the kit on the Jubilee line is a mixture of original Met/Bakerloo
signalling north of Baker Street, 1970s kit compatible with the retro
systems between Green Park and Baker Street, and a hastily implemented
bolt-on version of classic LUL signalling on the JLE (built after the
moving block ATO that had been originally planed for the JLE proved
to, err, not work at all).

--
John Band
john at johnband dot org
www.johnband.org

On Wed, 27 Jun 2007, Kev wrote:

On Jun 27, 11:18 am, John B wrote:
On Jun 27, 10:07 am, Kev wrote:

So why are there signal failures on the less than 10 years old Jubilee
Line extenstion or the less than 30 year old Jubilee Line or the less
than 50 years old Victoria Line.

Scientifically speaking, when you're talking about complex
electromechanical systems like train signalling, 30 years and 50 years
is Pretty Damn Old.

I notice that you didn't mention the less than 10 year old Jubilee Line
extension.

Oh, that's still being settled in!

tom

--
Science is bound, by the everlasting vow of honour, to face fearlessly
every problem which can be fairly presented to it. -- Lord Kelvin

On Jun 27, 5:49 pm, Tom Anderson wrote:
On Wed, 27 Jun 2007, Kev wrote:
On Jun 27, 11:18 am, John B wrote:
On Jun 27, 10:07 am, Kev wrote:

So why are there signal failures on the less than 10 years old Jubilee
Line extenstion or the less than 30 year old Jubilee Line or the less
than 50 years old Victoria Line.

Scientifically speaking, when you're talking about complex
electromechanical systems like train signalling, 30 years and 50 years
is Pretty Damn Old.

I notice that you didn't mention the less than 10 year old Jubilee Line
extension.

Oh, that's still being settled in!

tom



This reminds me of the early 1990s when slam-door suburban stock on
the South Eastern was replaced by class 465 "Networkers". The excuses
changed seamlessly from the trains being old to the trains being new.