In message , at 11:49:20 on Fri,
23 Feb 2007, Andrew Clark
remarked:
Indeed. It will have been closed for normal traffic for some time. Which
is why it's easily available for various (not just Royal Family) special
operations.

But in any sort of mass attack, the Tubes are going to be paralysed by (a)
general panic; (b) absenteeism of key workers; (c) breakdown of supporting
infrastructure (communications, signalling, electricity) consequent on the
foregoing.

Assuming that the network will be lying empty but functional seems very
naive.

It only needs to be functioning enough to handle one battery loco and a
carriage. No signals required.
--
Roland Perry

"Roland Perry" wrote

It only needs to be functioning enough to handle one battery loco and a
carriage. No signals required.

I always thought the Tube was electrically operated?

And what happened to the abandoned rolling stock? Evaporated?

In article ,
Andrew Clark wrote:

"Roland Perry" wrote

It only needs to be functioning enough to handle one battery loco and a
carriage. No signals required.

I always thought the Tube was electrically operated?


but batteries are simply a storage medium for electrity

--
From KT24 - in "Leafy Surrey"

Using a RISC OS computer running v5.11

"charles" wrote

but batteries are simply a storage medium for electrity

Doh!

In message , at 19:14:27 on Fri,
23 Feb 2007, Andrew Clark
remarked:
It only needs to be functioning enough to handle one battery loco and a
carriage. No signals required.

I always thought the Tube was electrically operated?

Last time I looked a battery loco carried its own electricity.

And what happened to the abandoned rolling stock? Evaporated?

In the depot. The first thing you'd have done is cleared the running
tracks.
--
Roland Perry

"Roland Perry" wrote

In the depot. The first thing you'd have done is cleared the running
tracks.

Without traction power? And who would clear the rolling stock, precisely?
The Royal Household?

In message , Andrew Clark
writes
Without traction power? And who would clear the rolling stock, precisely?
The Royal Household?
It used to be a sackable offence to leave any train standing on a line
BR or LT, so unless rules have changed, all trains will have a driver on
board and the depot is most likely to be where their car is to get home.
--
Clive.

"Clive Coleman." wrote
It used to be a sackable offence to leave any train standing on a line
BR or LT, so unless rules have changed, all trains will have a driver on
board and the depot is most likely to be where their car is to get home.

But an electric train stranded out the line with no power is not going to go
anywhere, whatever the signals say.

Peter

"Peter Masson" wrote in message
...

"Clive Coleman." wrote
It used to be a sackable offence to leave any train standing on a line
BR or LT, so unless rules have changed, all trains will have a driver on
board and the depot is most likely to be where their car is to get home.

But an electric train stranded out the line with no power is not going to
go
anywhere, whatever the signals say.

Peter

And quite probably because there is no traction supply there will be no
supply for the signals either. Also most underground lines also rely on
compressed air to operate the trainstops and point machines. All these
supplies come from substations dotted along the line. No supply in = no
supply out. Most if not all stations now have a UPS back up system to
supply lighting CCTV and PA systems for about 1 hour. After that runs
down, complete and utter blackness.

Bruce

In message , Peter Masson
writes
But an electric train stranded out the line with no power is not going to go
anywhere, whatever the signals say.
Why should it have no power? If all the electrical staff deserted, as
long as they didn't throw any switches, juice would still be on
throughout the network.
--
Clive.