On 29 Apr, 16:25, Steve Fitzgerald ] wrote:
St. Mary's Curve is indeed double track but due to the sharp curves, the
signalling has been modified to only allow one train in the section at
any one time due to the possibility of trains touching each other.

That begs the question of why did they build the tunnel that bit too
narrow?

B2003

Boltar wrote:
On 29 Apr, 16:25, Steve Fitzgerald ] wrote:
St. Mary's Curve is indeed double track but due to the sharp curves,
the signalling has been modified to only allow one train in the
section at any one time due to the possibility of trains touching
each other.

That begs the question of why did they build the tunnel that bit too
narrow?

Or the stock that bit too big?

Seriously, though, 'A' stock was not around when the curve was built. The
length of modern cars and the distance between the bogies means that the
centre of the vehicles swing further out when curving than earlier short
wheelbase stock would have done, with the resulting danger of scraping
trains passing in the other direction. 'A' stock was never intended for the
ELL and only really ended up there as a result of their being some
flexibility in the fleet during a recessional period.

In article ,
(Jack Taylor) wrote:

Boltar wrote:
On 29 Apr, 16:25, Steve Fitzgerald ] wrote:
St. Mary's Curve is indeed double track but due to the sharp
curves, the signalling has been modified to only allow one train
in the section at any one time due to the possibility of trains
touching each other.

That begs the question of why did they build the tunnel that bit
too narrow?

Or the stock that bit too big?

Seriously, though, 'A' stock was not around when the curve was
built. The length of modern cars and the distance between the
bogies means that the centre of the vehicles swing further out when
curving than earlier short wheelbase stock would have done, with
the resulting danger of scraping trains passing in the other
direction. 'A' stock was never intended for the ELL and only really
ended up there as a result of their being some flexibility in the
fleet during a recessional period.

Hmm. Wasn't the ELL stock at the time the A stock was built the F stock?
That was pretty close to the A Stock in dimensions wasn't it? I think St.
Mary's Curve was sized for steam stock.

--
Colin Rosenstiel

On Tue, 1 May 2007 00:46 +0100 (BST), (Colin
Rosenstiel) wrote:


Hmm. Wasn't the ELL stock at the time the A stock was built the F stock?

Yes, but it had only been there for a few years (since 1953, I believe).

Before that it was first generation District stock (mainly "B") stock -
and maybe others) which worked it from 1937 to 1953, having taken over
from earlier Met stock.

That was pretty close to the A Stock in dimensions wasn't it? I think St.
Mary's Curve was sized for steam stock.

Yes, but the curve was used for regular passenger services until 1939,
and I don't recall there being any restrictions for any stock before the
A stock arrived.

I have been ridden the curve as a passenger twice; once on F stock and
once on Q stock.

There seem to be very few photos around of the ELL between 1913
(electrification) and the F stock days. I don't have a single photo of
electric stock on the line before 1952.


--
Bill Hayles

http://billnot.com

On 1 May, 09:34, Bill Hayles wrote:
I have been ridden *the curve as a passenger twice; once on F stock and
once on Q stock.

Is there anything to see over this section or is it basically a
featureless section of tunnel with a junction at each either end?

--
gordon

On 1 May 2007 14:24:22 -0700, "
wrote:

On 1 May, 09:34, Bill Hayles wrote:
I have been ridden 4he curve as a passenger twice; once on F stock and
once on Q stock.

Is there anything to see over this section or is it basically a
featureless section of tunnel with a junction at each either end?

That about sums it up.


--
Bill Hayles

http://billnot.com