On Tue, 17 Aug 2010 19:04:19 +0100, "Peter Masson"
wrote:



wrote in message
...
On Tue, 17 Aug 2010 03:25:43 -0700 (PDT)
Andy wrote:
I read that 2009 stock is only 4cm wider that 67 stock. Are clearences
really so tight on the piccadilly that they couldn't be moved slowly via
rail over that line?


The cars are also slightly longer than the '67 stock, so the overhang
on the tight curves on the Piccadilly line is probably too much.
That's not to say that they wouldn't squeeze down the Piccadilly
tunnels running slowly, just that the time taken may be too long to
fit around the nightly engineering works.

You might have a point. Though the 73 stock on the piccadilly has very
long
cars so I wouldn't have thought the overhang on the 2009 could be any
greater
than those. *shrug*

ISTR that when it was delivered the Piccadilly stock didn't fit the
Piccadilly tunnels, and clearances had to be adjusted in a few places.

IIRC the current Central Line stock also had trouble with some curves
in the vertical plain causing scraped roofs.