No.115 The ex GWR ‘B’ Set - Continued

My last Post discussed the merits of various proprietary couplings that could be used to close the gap between two B Set Brake Composites. Sometimes the solution is so obvious that it gets overlooked.

Close Coupled B Sets, Airfix back, Mainline front


A search of the Internet points to an old blog from TimVenton currently with a work bench thread on the Scale Four web site. The picture montage below is from Tim's old Blog and shows two types of semi permanent ‘bar’ couplings that were used on some of the prototype coaches.
B Set Inner Bar Couplings, Diagram E129 left, Diagram E147, coaches No W6907W + W6908W right, courtesy of Tim Venton


If a simple bar was good enough for coupling the prototype why not for the model?

29 mm x 5mm strip cut from translucent vinyl divider


What to use? I settled on some thick plastic / vinyl film that I could cut with a craft knife.

Coupling bar cut to shape, 1/8 inch diameter holes at 24mm centres


In order to safely traverse Peco Medium, Radius Points I arrived at a diameter of 1/8 inch for the fixing holes and a spacing of 24mm.

 Keeper plates removed and bar placed over couplings pegs


The peg used to centre the Proprietary coupling has a diameter close to 3/32 inch but opening the holes out in the coupling bar to 1/8 inch provides a little extra tolerance if you have slipped when marking out the centres (or if the coach buffers are slightly protruding).

Ready for testing


All that remained was for the bars to be given a coat of black paint.

Painting


By a process of trial and error I deduced that the location on my layout with the tightest radius was where I had two Peco Medium Radius Left and Right points joined at the toe. The view below shows the buffer spacing at this location.

The proof of the pudding


As further proof I have loaded a short video to YouTube.


 

Whilst searching for details for the prototype coaches I came across the official ‘British Railways’ image shown below.

Official British Railways – Great Western Railway B Set image 1920 / 1930


The official images shows the brake composite fitted with short buffers on the inner end and long buffers at the outer end.


I also noted that there was only one First Class compartment, as modelled by Airfix and Mainline. Is the Hornby model with its two First Class compartments correct?

Another view of two completed sets, Mainline to the front, Airfix at the back


Finally another shot of two completed rakes. I am not too sure about the authenticity of a green early emblem locomotive and lined maroon coaches!

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