London Banter - View Single Post - Walk-through trains

[email protected] · August 14th 09, 11:28 PM posted to uk.transport.london

In article
,
(Andy) wrote:

On 13 Aug, 12:22, "Recliner" wrote:
"DW downunder" noname wrote in message

u

"MIG" wrote in message

...
On 13 Aug, 09:51, wrote:
On Wed, 12 Aug 2009 19:40:33 +0100

Paul Corfield wrote:

If apparently the 09 stock did get dragged through the piccadilly
line tunnels without incident then we can't be talking much
difference between 09 and other tube stocks can we? Maybe a
few centimeters one way or the other at most which surely
wouldn't make much difference to equipment?

Did it arrive that way? I thought it was delivered by road rather
than rail and then across the tube network. I'd genuinely like to
know the answer to this so if anyone can point me at the facts
it'd be good.

Thats what people on here were saying. I've no idea if its true.
But it occured to me that the victoria line uses an old piccadilly
line tunnel on the northbound at finsbury park and I very much
doubt they would have bothered to spend a fortune to enlarge it
by a few inches so as 09 stock has to fit through it must be
pretty close to standard tube gauge. B2003

Isn't it more to do with the bends rather than the diameter?

AIUI, the '09 units on test were road delivered. They are out of
gauge for other tube lines (we're talking maybe 20-25mm) with the
appropriate kinematic envelope for operational speeds. I suspect
they could be crawled through tight spots if the need arose. Current
practice (as distinct from past LT practice) would suggest little if
any need for through operation on other lines, and no plans to
"cascade" stock.
Finsbury Park was extensively remodelled to provide UP-UP and
DOWN-DOWN train flows and cross platform interchanges between Picc
and Vic. It replaced the previous layout which provided for
terminating GN&C trains of "main line" loading gauge. The line of
the Victoria route means that little if any old Piccadilly running
tunnel remains in use as such. As the Vic has just been going
through a rebuild from the track up, any minor structure gauge
anolomies would have been dealt with.

The ever-reliable Wiki source says that the 2009 stock is 2.68m wide
and the 1973 stock 2.629, so the 2009 stock is apparently 5cm or 2"
wider. It also says that, "Unlike the 1967 Tube Stock, the trains are
built 40 millimetres (1.6 in) wider to take advantage of the Victoria
line's slightly larger than normal loading gauge compared to the
other deep level tube lines."

Unfortunately, the unreliable Wikipedia has the 1967 stock as 9' 0
1/16" which would be 2.74m wide. Also unfortunately, it is the only
source I can find for 2009 stock details.

1967 stock is 8'8" (2.6416m) wide if I interpret the inside covers of my
1977 edition of "Tube Trains Under London" correctly.

--
Colin Rosenstiel