Humps on tube lines
 

In article , (Paul Scott) wrote:

"Bob" wrote in message
oups.com...
The Central London Railway began with Camel Backed Electric
locomotives hauling unpowered carriages. In order to improve
efficiency distinct humps (mini summits) were built into the track
profile at stations from Notting Hill to Liverpool Street - incoming
trains were slowed by the rising gradient whilst outbound trains
were hastened on their way by the falling out bound gradient. The
heavy unsprung locomotives were soon replaced by multiple units with
intermediate powered bogies. Does anybody know if humps are still
built into station tracks on new tube lines.

Howson's book on the Underground [1981] describes the Victoria line
as being built 'on a hump or sawtooth profile'; it is likely that the
Jubilee line was built with the same falling and rising gradients.

Not everywhere, presumably because of other constraints. The approach to the King's Cross St Pancras Victoria Line platform from Highbury and Islington is downhill into the platform.

--
Colin Rosenstiel

Humps on tube lines
 

"Colin Rosenstiel" wrote in message
...
In article ,
(Paul Scott) wrote:

"Bob" wrote in message
oups.com...
The Central London Railway began with Camel Backed Electric
locomotives hauling unpowered carriages. In order to improve
efficiency distinct humps (mini summits) were built into the track
profile at stations from Notting Hill to Liverpool Street - incoming
trains were slowed by the rising gradient whilst outbound trains
were hastened on their way by the falling out bound gradient. The
heavy unsprung locomotives were soon replaced by multiple units with
intermediate powered bogies. Does anybody know if humps are still
built into station tracks on new tube lines.

Howson's book on the Underground [1981] describes the Victoria line
as being built 'on a hump or sawtooth profile'; it is likely that the
Jubilee line was built with the same falling and rising gradients.

Not everywhere, presumably because of other constraints. The approach to
the King's Cross St Pancras Victoria Line platform from Highbury and
Islington is downhill into the platform.

Colin Rosenstiel

I'm sure that is implied elsewhere in the text, and with the Victoria line
at KX being the 4th or 5th pair of tunneled tracks I guess there would be
many problems for the routeing of the tunnels past existing infrastructure.

Paul

Humps on tube lines
 

In article , (Paul Scott) wrote:

Howson's book on the Underground [1981] describes the Victoria line
as being built 'on a hump or sawtooth profile'; it is likely that
the Jubilee line was built with the same falling and rising
gradients.

Not everywhere, presumably because of other constraints. The
approach to the King's Cross St Pancras Victoria Line platform from
Highbury and Islington is downhill into the platform.

I'm sure that is implied elsewhere in the text, and with the Victoria
line at KX being the 4th or 5th pair of tunneled tracks I guess there
would be many problems for the routeing of the tunnels past existing
infrastructure.

Indeed.

--
Colin Rosenstiel

Humps on tube lines
 

On Mon, 2 Jan 2006, Bob wrote:

Does anybody know if humps are still built into station tracks on new
tube lines.

The CTRL seems to do it:

http://www.ctrl.co.uk/route/tile1.asp?L=8

Although i don't know if that's really about playing tricks with energy,
or wanting to keep the tunnel nice and deep where possible.

tom

--
Chance? Or sinister scientific conspiracy?

Humps on tube lines
 

On Mon, 2 Jan 2006 wrote:

Is there anything approximating to a "200ft - Low - Club" on the London
Underground?

Given that the only bit of the tube that's 200 feet down is the run
between Golders Green and Hampstead [1], which takes all of a minute or
two to traverse, i don't think such a pitiful display of stamina is
something a gentleman would advertise!

tom

[1] Cue corrections ...

--
Chance? Or sinister scientific conspiracy?

Humps on tube lines
 

Tom Anderson wrote:
On Mon, 2 Jan 2006, Bob wrote:

Does anybody know if humps are still built into station tracks on new
tube lines.

The CTRL seems to do it:

http://www.ctrl.co.uk/route/tile1.asp?L=8

Although i don't know if that's really about playing tricks with
energy, or wanting to keep the tunnel nice and deep where possible.

When done by the CRL I don't think it was about "playing tricks with
energy". Electricity was still a very new form of energy and such
considerations hadn't arisen, it was simply a way of using a natural
phenomenon (gravity) to improve the performance of the trains. However good
the braking and acceleration of a vehicle on the level it will be enhanced
by going up/down hill at the appropriate moment.

Humps on tube lines
 

Tom Anderson wrote:
On Mon, 2 Jan 2006 wrote:

Is there anything approximating to a "200ft - Low - Club" on the
London Underground?

Given that the only bit of the tube that's 200 feet down is the run
between Golders Green and Hampstead [1], which takes all of a minute
or two to traverse, i don't think such a pitiful display of stamina is
something a gentleman would advertise!

Doesn't mean that it hasn't been done though eh?! :-)

Humps on tube lines
 

In message , Mal
writes

No but the effect of Metromess and TubeCrimes track replacements means
that it feels as if you are going over speed humps at 50 mph, worst bit of
track used it be Pic Acton to Hammersmith.

Used to be being the operative words....I think the PPP mob replaced it
didnt they...is it better now?

Not at all, they're still promising us that they will renew it all one
day. We have a (permanent!?) 30 mph TSR to keep us going though, so that
may be why things seem better.
--
Steve Fitzgerald has now left the building.
You will find him in London's Docklands, E16, UK
(please use the reply to address for email)

Humps on tube lines
 

"Tom Anderson" wrote in message
h.li...
On Mon, 2 Jan 2006 wrote:

Is there anything approximating to a "200ft - Low - Club" on the London
Underground?

Given that the only bit of the tube that's 200 feet down is the run
between Golders Green and Hampstead [1], which takes all of a minute or
two to traverse, i don't think such a pitiful display of stamina is
something a gentleman would advertise!

tom

[1] Cue corrections ...


If you get out at the unfinished North End Station, you can stay there all
night long.

BTN

Humps on tube lines
 

On Tue, 3 Jan 2006, Sir Benjamin Nunn wrote:

"Tom Anderson" wrote in message
h.li...
On Mon, 2 Jan 2006 wrote:

Is there anything approximating to a "200ft - Low - Club" on the
London Underground?

Given that the only bit of the tube that's 200 feet down is the run
between Golders Green and Hampstead [1],

If you get out at the unfinished North End Station, you can stay there
all night long.

I believe North End's official name would have been Bull & Bush.

Not clear which name offers the greatest innuendo potential, though.

tom

--
Plus, you gotta understand I can now type far, far faster than I can
think. This is not boasting - its admitting a personal tragedy. -- D