DLR Suspension/Derailment
 

On Apr 13, 3:07 pm, "Richard J." wrote:
first bogie. The front of the train came to a rest 88 metres after hitting
the object. There were no injuries to the 59 persons on board the train and

88 metres?? In other words the ATO didn't bother to stop it and
probably it was only stopped by the staff member pressing an emergency
stop. I wonder if its possible to design ATO so it would notice a
derailment?

B2003

DLR Suspension/Derailment
 

On Apr 14, 10:59*am, Boltar wrote:
On Apr 13, 3:07 pm, "Richard J." wrote:

first bogie. The front of the train came to a rest 88 metres after hitting
the object. There were no injuries to the 59 persons on board the train and

88 metres?? In other words the ATO didn't bother to stop it and
probably it was only stopped by the staff member pressing an emergency
stop. I wonder if its possible to design ATO so it would notice a
derailment?

B2003

We will have to wait for the RAIB report, but 88m is only 3 units
length (DLR units are 28.8m from the Platform 5 stock book).
Considering that the train will have been accelerating from the
station, stopping in three units length (equivalent to one and a half
train lengths for the normal double unit train) sounds reasonable for
an emergency stop without human intervention, especially as I don't
think the DLR has things such as magnetic track brakes and the train
captain would have to get to the emergency stop from where ever he is
sitting / standing.

DLR Suspension/Derailment
 

On Apr 14, 7:21*pm, Andy wrote:
On Apr 14, 10:59*am, Boltar wrote:

On Apr 13, 3:07 pm, "Richard J." wrote:

first bogie. The front of the train came to a rest 88 metres after hitting
the object. There were no injuries to the 59 persons on board the train and

88 metres?? In other words the ATO didn't bother to stop it and
probably it was only stopped by the staff member pressing an emergency
stop. I wonder if its possible to design ATO so it would notice a
derailment?

B2003

We will have to wait for the RAIB report, but 88m is only 3 units
length (DLR units are 28.8m from the Platform 5 stock book).
Considering that the train will have been accelerating from the
station, stopping in three units length (equivalent to one and a half
train lengths for the normal double unit train) sounds reasonable for
an emergency stop without human intervention, especially as I don't
think the DLR has things such as magnetic track brakes and the train
captain would have to get to the emergency stop from where ever he is
sitting / standing.

I agree about waiting for the report, but the DLR has been getting
slower and slower, and they've been going at a very slow crawl along
that bendy section for some time (even slower since the derailment).

I think it is very unlikely that this distance was covered while
braking from speed. It's probably how far it would coast if the power
was cut.