wrote in message

On Fri, 13 Jan 2012 11:24:38 -0000
"Recliner" wrote:
At 3078mm, Space Train is 436mm wider at waist height than existing

Over 3m wide wide??? Surely that can't be right. Thats wider than UIC
gauge. I can't believe they'd fit in the tunnels.

It's why the images show a near circular cross-section, taking advantage
of the tunnel shape.
http://www.flickr.com/photos/stephenk1977/108328170/


In addition, the intention is to abandon the third and fourth rails
on the track in favour of a roof-mounted collector running on a
positive rail, with negative return through the running rails in the
conventional manner for metros. Installation of platform screens
with doors matching those in the train may permit an increase in
voltage, say to 1·5 kV. To

I'm guessing they'd have had to remove the link to the piccadilly
line at finsbury park so the negative return didn't cause chaos with
the piccadillys signalling.

Yup, it would presumably be completely separated from other lines, at
least until they too were upgraded to the same spec.