Paul Corfield wrote:
On Thu, 09 Oct 2014 16:22:46 GMT, d wrote:

http://www.bbc.co.uk/news/uk-england-london-29520761

I distinctly remember arguing on this group a few years back with someone
saying that walk through tube trains would be impossible because of [insert
nonsense reason about loading gauge here]. Good thing for them I can't remember
who it was and I'm too lazy to go through the archives otherwise there would be
a serious session of I Told You So right now.

I would prefer to wait and see them in service. A drawing and a
snazzy video does not a working, viable production train make. And it
wasn't me who argued with you in the past. I don't really care very
much but each of the Picc, Bakerloo and Central have their own
particular constraints and issues so there has to be a tiny question
in my mind that one generic design will inevitably be compromised in
order to fit all three routes without any problems.

Yes, this mockup of new "38 Tube stock" (did anyone notice the number in
the picture?) trains seems to have rather unrealistically thin articulated
joints. The tight curves on the Picc would certainly need much thicker
bellows, allowing much more motion between carriages.