Help with Signalling - GWR/WR

[The Stationmaster]

 

 

are there any pics of a typical co-located disc, was it at the foot of the post or mounted up high or on a bracket typically 

 

Have a look at pictures of Penzance station - although beware as the discs there were far bigger than normal.  Most pictures I've seen show BR era installations although there were definitely some GWR period examples with discs at ground level adjacent to the foot of the signal, there was one at Dousland for example although the ground disc was a bit further away from the signal post than this example from the preservation era at Staverton Bridge -

 

Edited January 3, 2018 by The Stationmaster

[Junctionmad]

Have a look at pictures of Penzance station - although beware as the discs there were far bigger than normal.  Most pictures I've seen show BR era installations although there were definitely some GWR period examples with discs at ground level adjacent to the foot of the signal, there was one at Dousland for example although the ground disc was a bit further away from the signal post than this example from the preservation era at Staverton Bridge -

 

IMGP6949.jpg

Thanks for all the help

[imt]

Please excuse my ignorance, and its a bit off topic but since the photos are here ...........

 

With a co-located disc as shown in post #26 above, how do the signals operate.  Modern signalling has sort of co-located PLS under the main signal, but that's easy to understand as the PLS does not have a "stop" aspect to display.  Here there are to my simple mind 2 stop signals - on on the ground and one up above.  Does the co-located disc have to be moved to "off" when the main stop arm is lowered?  I have probably mixed terminology but I think the experts might be able to understand me.

[The Stationmaster]

Please excuse my ignorance, and its a bit off topic but since the photos are here ...........

 

With a co-located disc as shown in post #26 above, how do the signals operate.  Modern signalling has sort of co-located PLS under the main signal, but that's easy to understand as the PLS does not have a "stop" aspect to display.  Here there are to my simple mind 2 stop signals - on on the ground and one up above.  Does the co-located disc have to be moved to "off" when the main stop arm is lowered?  I have probably mixed terminology but I think the experts might be able to understand me.

 

They are completely separate signals - think of it as a splitting signal at a junction.  The nearest semaphore equivalent to a subsidiary position light is a Calling On Signal which serves a very different purpose from a co-located disc.

[Junctionmad]

Just an update 

 

Using Peco geometry , I dont have the room to fit the two intermediate starters between the runing lines as per the prototype and widening the lines causes issue in other places

 

What would the correct prototype response be in repositioning  these signals ? 

 

thanks 

 

dave

 

Edited February 7, 2018 by Junctionmad

[The Stationmaster]

Just an update 

 

Using Peco geometry , I dont have the room to fit the two intermediate starters between the runing lines as per the prototype and widening the lines causes issue in other places

 

What would the correct prototype response be in repositioning  these signals ? 

 

thanks 

 

dave

 

clubOgauge.png

 

Use a bracket structure although possibly a gantry might be used depending on spacing - there were examples of both approaches to a basically similar situation and were more site dependent than anything else by the time tubular post signals were being erected.  Oxford had a bracket structure at one end and a gantry at the other in the days of metal signal structures.

[Junctionmad]

thanks for that stationmaster 

 

So would something like this  ( tubular GWR /WR) 

 

 

be appropriate for my  Up headhunt , loop starter , main  starter 

 

or would the loop and main be the same height  ?

 

 

 

ie 

 

 

( without the distants etc ) 

 

 

 

thanks 

 

 

dave

Edited February 7, 2018 by Junctionmad

[The Stationmaster]

thanks for that stationmaster 

 

So would something like this  ( tubular GWR /WR) 

 

Screenshot 2018-02-07 17.47.44.png

 

be appropriate for my  Up headhunt , loop starter , main  starter 

 

or would the loop and main be the same height  ?

 

 

 

ie 

 

Screenshot 2018-02-07 17.57.13.png

 

( without the distants etc ) 

 

 

 

thanks 

 

 

dave

 

That looks as if the horizontal separation between the dolls might not be enough although the overall form is roughly correct.  To get it right the separation between the extreme right hand doll and the middle doll needs to be greater than the separation between the middle doll and the left hand doll - Reading drawings show the separation as 8ft and 5 ft respectively.   The arm on the right hand doll can be at the same elevation as that on the middle doll unless there is any particular sighting reason to make it higher, or lower.

[Junctionmad]

thanks very much Mike , this will all be useful when we come got make the signals 

 

 

dave