Hi
I thought I would shock Tim and Gordon, who have contributed most of the pictures, by actually adding something to my own thread, mainly in answer to the question about the signalling diagram in MRJ 259.
A small bit of history of the layout's origins will help - essentially started by myself after a desire to have another bit of layout that could be taken to a show, and after a lot of prompting by members of the local group, in particular the late John Bailey, and the very much still with us Geoff Taylor. Lots of debate about track plan, size and scope, ensued, with John's interests in the LNWR providing a nice counterpoint to mine in the L&YR. Eventually, after much muttering about track plans such as Delph the Kerrinhead track plan was settled upon.
So that is how the track plan was devised. Then came the signalling. This is intended to represent typical L&YR practice towards the end of its existence, and being a member of the L&YR Society help was sought through the membership. Chris Littleworth provided suitable technical and historical knowledge - he is the author of a number of books on the subject. He also performs various other roles, including something along the lines of 'Signalling Officer' for the East Lancs railway, and used his knowledge and contacts in the real signalling world to try and produce the best 'typical' signalling arrangement for Kerrinhead.
Of course, Kerrinhead is very much an atypical L&YR branch terminus - most of the real ones were double rather than single track. However we are very comfortable with what was decided upon.
Essentially the signals are all about controlling access to the running line. I am hopefully attaching a picture of the control panel which will show that there are actually 'three' frames in use. The first, of 20 levers, represents the frame in the signal box, and contains levers for all the signals (currently being constructed), and for all the points that interact with the running line, and associated locking levers. The only exception to the running line levers is the single lever that controls the crossover at the end of the platform (labeled X), which is intended to represent the ground frame which would have typically been used for such points in this situation and which is itself locked by one of the levers in the signal box frame.
There is a third frame of 5 levers, which represents the 5 hand levers which would have operated the points to the sidings off the loop. Since these are not part of the running line they are not part of the main frame. They have been labelled and drawing green to visually differentiate between these and the rest of the track work.
So to get back to the original question (I hope) - the arms on ground signals on the loop (17,16 and 4,5) are about controlling access to/from the running line and have no relationship with the yard paintwork Y1-5.
At the end of the day I do not fool myself into thinking it is perfect, but it is as perfect a representation as I have been able to make within the constraints of time and space, with which I am quite satisfied. Maybe the next one will be even better! The red buttons in the centre control electromagnets for uncouplers, the single one to the right is for the Bell, one day to be Electric Train Token somehow, and the five buttons top right control the turntable.
Some final things - should you be interested the lever frames are from the Scalefour Society and the five-lever frame on the right hand side (for the yard points) is actually the first test etch ever assembled for this kit (many years ago), and is still going strong should anyone wonder how reliable the kit is. And the whole control panel works through DCC, and thus plugs in just using a NCE CAB Bus cable - something often asked about and which might cause me to write another article should we find more people keep asking questions.
Hope all this is of some use - the next trip to a show is Scaleforum 2018 in Aylesbury
Gavin