|
|
Post by q8 on Apr 22, 2005 17:38:32 GMT
 Now lads (NOT signal staff) Signal EN4 ( inner home Whitechapel westbound) has a normal signal and repeater on the post. There is also a shunt signal beneath them. Why? 
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Apr 22, 2005 17:59:33 GMT
|
|
|
|
Post by q8 on Apr 22, 2005 18:12:19 GMT
i know but im not allowed to tell
---------------------------------------------------------------------
Yeah let's see if the other guys can suss it out. ;D ;D ;D
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Apr 22, 2005 18:59:40 GMT
It's for the siding next to platform 4  EN4 sets the route across 19B, 18B, 21B and 21A points. Anyone in the siding probably gets let out onto the main, drawn up to A869 and then shunted using EN6 if forming a westbound service. |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Apr 23, 2005 0:21:26 GMT
It's for the siding next to platform 4 EN4 sets the route across 19B, 18B, 21B and 21A points. Anyone in the siding probably gets let out onto the main, drawn up to A869 and then shunted using EN6 if forming a westbound service. If you have a look at this diagram from Dave's Whitechapel page, you can see the shunt signal (EN7) which is on the same post as EN4 approaching platform 3... Study the diagram, and guess again, OneKEA!!! ;D (I'll not answer the question yet, seeing as I have a line supplement which answers the question anyway! It's cheating a bit! ;D) |
|
Colin
Advisor
My preserved fire engine!
Posts: 11,346
|
Post by Colin on Apr 23, 2005 2:33:16 GMT
I know this one too Q8, but I'll keep quiet for now. It would be nice see a non District person get it! ;D  |
|
|
|
Post by piccadillypilot on Apr 23, 2005 7:43:23 GMT
If a train is reversing east to west it shunts clear of EN6. When EN6 clears EN7 allows the train to proceed past the running signal (EN4) into the platform to complete the shunt move.
This is because when making a move all signals are to be of the same type to avoid confusion. Thus a driver when making a shunt move will only obey shunt signals and when making a normal running move will only obey running signals.
In this instance the move ends when the train stops in the westbound platform.
|
|
|
|
Post by q8 on Apr 23, 2005 9:00:55 GMT
 So far so good. Mr 1K and PP have given valid reasons for signal EN7 but those are not the original reason.. Anybody else wnat to have a go?
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Apr 23, 2005 9:06:33 GMT
Q8 you have a prvate message
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Apr 23, 2005 9:31:38 GMT
Ah well, at least I tried I'd be interested in knowing what the 'real' reason is as well... |
|
DWS
every second count's
Posts: 2,487
|
Post by DWS on Apr 23, 2005 10:04:10 GMT
So far so good. Mr 1K and PP have given valid reasons for signal EN7 but those are not the original reason.. Anybody else wnat to have a go? At one time in the past it was possible for steam worked ballast trains, for the loco to run round the train. |
|
|
|
Post by q8 on Apr 23, 2005 10:10:14 GMT
.
This is because when making a move all signals are to be of the same type to avoid confusion. Thus a driver when making a shunt move will only obey shunt signals and when making a normal running move will only obey running signals.
------------------------------------------------------------------------
That doesn't always hold true though. If you reverse west to east at Dagenham East via FG18 and 13 points into the eastbound platform you have to pass FG22 at green to reach the platform. Incidentally I know YOU know this but others may not. FG22 is one of those signals that goes OUT if you are running into the bay road. That also applies to A835a at Mansion House and EJ2 at Tower Hill.
|
|
|
|
Post by q8 on Apr 23, 2005 10:31:20 GMT
At one time in the past it was possible for steam worked ballast trains, for the loco to run round the train. ----------------------------------------------------------------------- ;D Good on yer Mr DWS!!! That is exactly the original reason for signal EN7.... |
|
|
|
Post by piccadillypilot on Apr 23, 2005 11:14:06 GMT
. That doesn't always hold true though. Quite true, there's always the odd one out. At one time in the past it was possible for steam worked ballast trains, for the loco to run round the train. Which would have been a necessity when the station opened as a terminus in 1884 and both the Met and the District were entirely steam worked. Shows how much they've changed in 120 years doesn't it? ;D |
|
So far so good. Mr 1K and PP have given valid reasons for signal EN7 but those are not the original reason.. Anybody else wnat to have a go?
