Derailed trains
 

What happens to them? I mean, what happened to the one involved in the
Chancery Lane derailment? Is it back in use? And what about the
derailed Piccadilly and Northern trains, what's going to happen to
them?

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Derailed trains
 

Robin May wrote in message ...
What happens to them? I mean, what happened to the one involved in the
Chancery Lane derailment?

The undamaged part of the train is back in service, however the rear four cars have been sent to Adtranz Crewe for repair.


Is it back in use? And what about the
derailed Piccadilly and Northern trains, what's going to happen to
them?


Dunno, presume the Picc one probably wasn't that badly damaged, and will simply be out of service for a few weeks or months. As for the 95ts, cars involved in similar derailments (e.g. Piccadilly Circus) have been scrapped, though with the superior crashworthiness of the 95ts, it's quite likely that the car(s) concerned will be repaired, probably by an external contractor.

Derailed trains
 

In article , (3518+3227)
wrote:

Robin May wrote in message ...
What happens to them? I mean, what happened to the one involved in
the Chancery Lane derailment?

The undamaged part of the train is back in service, however the rear
four cars have been sent to Adtranz Crewe for repair.


Is it back in use? And what about the
derailed Piccadilly and Northern trains, what's going to happen to
them?


Dunno, presume the Picc one probably wasn't that badly damaged, and
will simply be out of service for a few weeks or months. As for the
95ts, cars involved in similar derailments (e.g. Piccadilly Circus)
have been scrapped, though with the superior crashworthiness of the
95ts, it's quite likely that the car(s) concerned will be repaired,
probably by an external contractor.


If they haven't been completely robbed by then!

Roger

Derailed trains
 

Derailed trains
 

In article , (3518+3227)
wrote:

wrote in message ...
If they haven't been completely robbed by then!


That doesn't stop them repairing the immediate damage, and then
deciding that it's too expensive to re-fit all the missing equipment,
and scrapping the cars anyway.

It's happened before!


Be interesting to see how they patch up the body - originally they came
from Spain, so it's not likely they'd have a spare shell hanging around.

Roger

Derailed trains
 

"3518+3227" wrote in message ...
cars involved in similar derailments (e.g. Piccadilly Circus) have been
scrapped, though with the superior crashworthiness of the 95ts, it's
quite likely that the car(s) concerned will be repaired, probably by an
external contractor.

Superior crashworthiness?? Christ , I'd hate to see what would have happened
to the old stock in a similar situation. I've seen pictures of less damaged
road vehicles in higher speed crashes than that and railway vehicles are
supposed to be stronger! If a car or bus hit a tree at 15mph you wouldn't
expect the whole front to disintegrate but thats exactly what happened to this
northern line carriage!

B2003

Derailed trains
 

Derailed trains
 

Robin May wrote in message ...
Are you stupid? A train is several times longer than a car or bus and
even more times heavier.

No **** sherlock. And consequently they should be built a damn site stronger
than road vehicles. Obviously this is not the case, at least not for tube
trains. If any vehicle crumples up at such a low speed it doesn't say a lot
thats good about the design. Perhaps they should have used the same team
who designed the mainline mk3, probably one of the safest vehicles on wheels.

B2003

Derailed trains
 

In article ,
Boltar wrote:
Obviously this is not the case, at least not for tube trains.
If any vehicle crumples up at such a low speed it doesn't say
a lot thats good about the design.

This is not my specialist subject, but surely it is the case
that the crumpling up makes them safer. Wasn't it the case that
a number of rail crashes a while back were made much worse
because the carriages were built off incompressible underframes
and so rode up violently in a collision?

--
Tony Bryer

Derailed trains
 

"Boltar" wrote in message
om...
Robin May wrote in message
...
Are you stupid? A train is several times longer than a car or bus and
even more times heavier.

No **** sherlock. And consequently they should be built a damn site
stronger
than road vehicles. Obviously this is not the case, at least not for tube
trains. If any vehicle crumples up at such a low speed it doesn't say a
lot
thats good about the design. Perhaps they should have used the same team
who designed the mainline mk3, probably one of the safest vehicles on
wheels.

It's entirely sensible for trains to crumple on impact, to absorb some of
the force of the collision.

Derailed trains
 

Tony Bryer wrote in message ...
This is not my specialist subject, but surely it is the case
that the crumpling up makes them safer. Wasn't it the case that
a number of rail crashes a while back were made much worse
because the carriages were built off incompressible underframes
and so rode up violently in a collision?

I think its the old stock with bodies built on frames rather than
monocoque construction where that occurs. I'm not sure crumple zones
on carraiges are a terribly good idea since in the rush hour a dozen
people or more might be standing in the bit that crumples besides which
in a major accident carraiges tend to go all over the place and don't
always impact head on with whatever they hit. Better to make the whole
design strong so that it doesn't fly apart and hope for the best I would
have thought. Besides , if you're doing 125mph or even 180mph in a eurostar
and theres an accident I doubt a few feet of crumple zone would make a blind
bit of difference.

B2003

Derailed trains
 

Ed Crowley wrote:
"Boltar" wrote in message
om...
Robin May wrote in message
...
Are you stupid? A train is several times longer than a car or bus
and even more times heavier.

No **** sherlock. And consequently they should be built a damn site
stronger than road vehicles. Obviously this is not the case, at
least not for tube trains. If any vehicle crumples up at such a low
speed it doesn't say a lot thats good about the design. Perhaps they
should have used the same team who designed the mainline mk3,
probably one of the safest vehicles on wheels.

It's entirely sensible for trains to crumple on impact, to absorb
some of the force of the collision.

But the front of the derailed car at Camden Town was destroyed rather than
crumpled. Photo at http://news.bbc.co.uk/1/hi/england/london/3227365.stm
This may have been because it hit the wall at an angle rather than head-on.
--
Richard J.
(to e-mail me, swap uk and yon in address)

Derailed trains
 

Derailed trains
 

Ed Crowley wrote:
It's entirely sensible for trains to crumple on impact, to absorb some of
the force of the collision.

Isn't that what the couplings are supposed to do?

Rigid coaches linked by squishy bits sounds good to me

Colin McKenzie
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Derailed trains
 

On Thu, 30 Oct 2003 16:07:42 GMT, "Richard J."
wrote:

But the front of the derailed car at Camden Town was destroyed rather than
crumpled. Photo at http://news.bbc.co.uk/1/hi/england/london/3227365.stm
This may have been because it hit the wall at an angle rather than head-on.

Probably. One of the fundamental weaknesses of a metal tube of any
kind (or indeed a bog roll tube if you want to try it out yourself!)
is that, while it can take a massive end loading without buckling, a
small side loading is sufficient to cause major deformation. Without
returning to compartment stock (obviously not practicable on the
Tube), this will always be the case regardless of strengthening.

How the Mark 3 and aluminium Turbo stock performed (or did not) in
recent HST crashes is a good comparison. Compress the HST stock
end-on and it's fine. If one vehicle jack-knifes, it'll likely end up
in a far worse way.

The other issues, of course, are that Tube trains travel much more
slowly - and in the majority of cases (e.g. Chancery Lane) will stay
in line simply by virtue of the fact that the tunnel is but a few
inches away on each side, so collisions at an odd angle are rare.
This must surely impact on the design.

Neil

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