wrote in message
...
On Wed, 25 Apr 2012 12:28:48 +0100
Paul Corfield wrote:

Traction current supply and current rails for the more powerful trains

So the new trains are inefficient overweight lardbutts like the trains on
the
3rd rail network? I can't believe aircon makes so much difference to the
power
usage that they need to upgrade the supply.

Running a higher frequency also makes a difference though.

The Met main line peak service goes up from 22 to 28 tph, the top and bottom
of the circle from 28 to 32 tph.

Paul S