"Richard J." wrote in message
. uk...
Brimstone wrote:
"TheOneKEA" wrote in message
oups.com...
Brimstone wrote:
All of which can be overcome, especially the loading gauge
question.
I don't see tube stock clouting any of the bridges. between Ealing
Bdy and West Ealing. WRT to speeds, 92 stock accelerates quicker
than anything on the mainline and it's only travelling about
three- quaters of a mile anyway.

It's not a matter of the tube trains hitting lineside structures,
it's
a matter of what you're going to use to get a defective 1992TS off
of the line when it can't move itself...


What do you use to move a failed D78 on the Richmond branch

Battery loco from Lillie Bridge or Acton Town?

The control systems on a D can be split in half, so that if there is a
failure on one the other can get the train back to depot. Even on LU metals
the need for an assisting train is extremely rare and only due to a
catastrophic failure.