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GWR signal Round post height


DapolDave

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Hi chaps,

 

A couple of questions if anyone can help please?

 

1) what is the height of the round post signals used by the GWR?

 

 

Differs, depending on location / sighting.

 

2) I note smaller Home arms on some signal brackets, any idea their size?

 

This would be 3ft, I think. Used for goods lines, etc.

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  • RMweb Gold

Standard heights for (G)WR straight tubular posts for a single arm put the arm at 17ft 6ins above rail level (the most common) or at 12ft 6ins, I believe the early ones (pre-war) placed the arm at 27ft 6ins but they were not all that common as I understand things (and the very first ones had 5ft wooden arms with the old pattern of built-up spectacle plate).

 

The standard 1947 pattern running signal arm was 4ft (that is the one with the turned over edges and completely flush front) were 4ft long as were the earlier design which had a single corrugation at both the top and bottom edge. The shorter arm were officially referred to as 3ft and a comparative check on an undimensioned drawing suggests that to be correct - incidentally the arm length includes the piece mounted onto the spectacle plate, i.e. it is the whole of the visible (from front) coloured area. The figures also check out proportionately when looking at a bracket or gantry drawing which has the dolls separated at 5ft centres where 4 ft arms are in use (the separation between dolls was 4ft when 3ft arms were used on both or all dolls but 5 ft if a 3ft arm was on one doll and a 4ft arm on another).

 

The vertical separation between the stop arm and a lower arm distant was 4ft ins measured centre line of arm to centre line of arm.

 

As most people don't know, let alone model, the difference between the two types of enamelled running signal arm you could readily market the later ones as 'GWR' even tho' they were very late in the company's history.

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Does this mean we are getting round post WR signals as well, if so thats great news.

 

I know some of the older timber square post signals lasted till quite late but the round post ones are what I remember being most common in the 70s with their silver painted posts, just right to go with Dapol hydralics..

 

Here in Cornwall you can still find them on the main line.

 

http://www.flickr.co...s-45603744@N06/

 

http://www.flickr.com/photos/sydpix/5398916338/in/faves-45603744@N06/

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Here in Cornwall you can still find them on the main line.

 

http://www.flickr.co...s-45603744@N06/

 

http://www.flickr.co...s-45603744@N06/

The Par bracket is still there, but sadly the Penzance semaphores were replaced by colour lights (still worked from the signal box) many years ago.

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Having round post signals available will be good. When did the signal post change from white to aluminium?

Cheers

Chris

I think it was the early 1950s but am not at all sure about the precise date and it might even be a little earlier; aluminium colour paint was definitely being used on tubular steel posts in 1955/56. Wooden post signals continued to be painted white on the Western Region. Where lines went over to LMR control signals were repainted (when painting was due) in LMR colours thus steel posts there were painted white.

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