Andy wrote:
On 23 July, 16:17, "Recliner" wrote:
"Peter Masson" wrote in message



"Tom Barry" wrote
And without Boris trumpeting them as meeting a manifesto commitment,
to boot. If they'd only had aircon...
Among the problems with aircon on the tube lines is - where do you
dump the heat? Presumably on, say, the Central or Piccadilly lines it
would be possible to devise a system whereby the heat was retained on
the train until it got to the open air, and then dumped, but Victoria
Line trains stay underground all the time they are in service. No use
cooling the trains if you just heat the tunnels even more.
That's why the plan is to cool the stations, not the trains, but of
course there's less to see with that approach.

And the regenerative braking on the new 2009 stock will also mean less
heat released into the stations and tunnels in the first place.

Is there no regenerative breaking on the current rolling stock? What
bout on other lines?