"M J Forbes" wrote in message
oups.com...
So is that to imply that there's no tripcock-equipped lines that are
signalled for bi-directional working? Or if so, is there some
technical gubbins that will lower the "wrong-direction" cocks when a
train is running wrong line?

The back tripcocks remain operational at all times - indeed instances of
trains being "back-tripped" are quite common, mainly due to obstructions on
the line.

On bi-directional lines, trainstops reading in the wrong direction will be
automatically lowered as the train approaches, and will raise again when the
train passes to provide protection. There are still problems with certain
reversing movements, however...

As an example, if an 8-car train of A stock reverses eastbound in the Circle
Line platform at Baker Street, the sequence is as follows:-
1. Westbound starting signal cleared, train shunts forward far enough to
fit behind the eastbound starter (w/b starter change to red once front of
train passes it).
2. T/Op cuts out tripcock at that end, and changes ends.
3. Eastbound starting signal cleared and train departs east, rear trip
striking the now-raised trainstop at the westbound starter, but with no
effect because cut out.
4. Tripcock cut back in next time train driven from that end.

As can be seen, problems often arises not with the wrong-road starter, but
with other signals.

On Tue, 19 Jul 2005 17:56:37 +0100, "Matt Wheeler"
wrote:

The leading tripcock will only hit a trainstop if the signal is
being passed
at red, not usually done.

The rear tripcock is on the wrong side of the track to connect with
the
trainstop.

So is that to imply that there's no tripcock-equipped lines that are
signalled for bi-directional working?

If there is (on the Met), Platform 2 at Amersham and Platform 5 at
Harrow on the Hill may be bi-di. I can't be sure about Amersham, but
i've seen A stock in platform 5 at harrow (Chiltern, london bound),
when on an Aylesbury bound train in platform 6, and pretty sure that
the platform 5 train was shown as for Rickmansworth.

As was demonstrated during the weekend closures for the Wembley Park
works, there is plenty of bi-directional trackwork to the west of
Harrow-on-the-Hill station, and trains can reverse east-to-west in
almost any platform. Platform 2 (the one you describe as 5) has
electric rails solely for this purpose.

"Minna Daisuki Katamari Damacy" wrote in
message ups.com...


SNIP!


As for the maximum speed limit on the LUL, well, there is a very grey
area at Amersham. There is a 70mph speed limit sign between Amersham
station and the Network Rail boundry, beyond the electrified track.
Now im told that the maximum speed anywhere on the LUL is 60mph. Ive
never seen this written down, but ive been told many times by many
different people that it is. But this 70mph sign exists. Can trains do
70mph there, or is this 60mph limit real? I for one keep on acclerating
past 60mph.


If you are lucky enough to actually get a unit capable of getting above 60
before Mantles Wood! Having to clear the 15mph "ESR" doesn't make it any
easier either.

Roger

http://rpm-railpics.fotopic.net/
http://therailwaystationgallery.fotopic.net/
http://therailticketgallery.fotopic.net/

All opinions expressed are my own and do not necessarily reflect the views
or policies of my employer.

True. But its always good to try! ;o)
I usually manage to be able to creep over the 70mph barrier just as the
radio goes back to area 88.

"Chippy" wrote in message
ups.com...
Andy H wrote:
"Chippy" wrote in message
oups.com...
Andy H wrote:


I don't mean to be rude but that demonstrates a clear lack of
understanding
and knowledge about the system!

Does it?


Firstly the trip arm is not that accessible,

Accesible enough.

secondly the force required would result in some broken toes,

Utter nonsense. Your obvious exaggeration makes it clear that your
opinions are not worth bothering with.

Have you ever actually tripped a tripcock? Stupid question really -
obviously not!

Well, at least now you've got somethingright - you are quite correct
that it is a stupid question, because it is totally irrelevant to the
issue at hand. A typical arsehole's wriggle, in fact.

You know not with whom you argue "Chippy"...

The tripcock arm is on the 6 foot side so accessibility is restricted to the
sucidally insane unless a block can be arranged with the signaller.

To reset the tripcock manually requires more than a little brute strength.
If possible a brick, large chunk of ballast or piece of wood is needed to
perform this function.

In fact, it is your opinions that are worthless. And as a grammatical tip,
never use a preposition to end a sentence with.

Roger

In message , RPM
writes
The tripcock arm is on the 6 foot side so accessibility is restricted
to the sucidally insane unless a block can be arranged with the
signaller.

To reset the tripcock manually requires more than a little brute
strength. If possible a brick, large chunk of ballast or piece of wood
is needed to perform this function.
On LT 38 and 62 stock this function was carried out by securing the
train, climbing out of the cab central door and pulling a loop of
string, just under the right hand side of the bodywork at the front.
Not a difficult job, but in a dark tube tunnel you needed a torch, and
very precarious when the juice rail was on that side.
--
Clive

On 19 Jul 2005 04:52:40 -0700, "M J Forbes"
wrote:

The leading tripcock will only hit a trainstop if the signal is being passed
at red, not usually done.

The rear tripcock is on the wrong side of the track to connect with the
trainstop.

So is that to imply that there's no tripcock-equipped lines that are
signalled for bi-directional working? Or if so, is there some
technical gubbins that will lower the "wrong-direction" cocks when a
train is running wrong line?

There are (as I said earlier in the thread) a few places on LU where
trains can go in either direction, terminal lines being the most
obvious. At these locations the "wrong way" trip levers will be seen
to lower as a train approaches to prevent rear-tripping. IIRC High
Street Kensington is such a place possibly with some short stretches
of bi-directional track on the southern approaches. The same possibly
also applies to the two through Met main line platforms at Baker
Street if they are still signalled to cope with reversing trains.

On Tue, 19 Jul 2005 18:26:43 +0100, asdf
wrote:

snip
As was demonstrated during the weekend closures for the Wembley Park
works, there is plenty of bi-directional trackwork to the west of
Harrow-on-the-Hill station, and trains can reverse east-to-west in
almost any platform. Platform 2 (the one you describe as 5) has
electric rails solely for this purpose.

ISTR that platform always was electrified but more as a precaution
against the misrouting that occurs from time to time. Unlike e.g.
sending a Marylebone to Rugby train down the Uxbridge line, sending an
electric train down a non-electrified track takes a bit longer to
"undo".

Clive wrote:
In message , RPM
writes
The tripcock arm is on the 6 foot side so accessibility is restricted
to the sucidally insane unless a block can be arranged with the
signaller.

To reset the tripcock manually requires more than a little brute
strength. If possible a brick, large chunk of ballast or piece of
wood is needed to perform this function.
On LT 38 and 62 stock this function was carried out by securing the
train, climbing out of the cab central door and pulling a loop of
string, just under the right hand side of the bodywork at the front.
Not a difficult job, but in a dark tube tunnel you needed a torch, and
very precarious when the juice rail was on that side.

Which is why the juice rail was extremely rarely on that side.

RPM wrote:

You know not with whom you argue "Chippy"...

Someone who hasn't quite grasped what we are talking about by the look
of it...


The tripcock arm is on the 6 foot side so accessibility is restricted to the
sucidally insane unless a block can be arranged with the signaller.

To reset the tripcock manually requires more than a little brute strength.
If possible a brick, large chunk of ballast or piece of wood is needed to
perform this function.

Right. So where has the issue of re-setting a tripcock arisen in this
discussion, up till now?


In fact, it is your opinions that are worthless.

Given your complete inability to even understand what is being
discussed, that is beautifully ironic.

And as a grammatical tip, never use a preposition to end a sentence with.

Hush, fool.