The Squire of Old Parrock suggested a progress report so, with a duly obeisant tug of the forelock, here are some photographs of my recent activities.
I have been working on the two fiddle yard boards (right hand one a nominal 500mm long, and the left one 450mm) and a dismountable control 'desk'. Each fiddle yard has a drawer-like box under the running surface, sitting between the extendable drawer runners. These boxes are intended to hold dismountable structures and stock during transit. The fiddle yards incorporate softwood bearers that locate directly onto the drawer runners, and the boards are then locked into place against the main baseboard using single-hand operating ratchet clamps.
The first photograph shows the basic box / drawer structure of the fiddle yard boards. This is the right-hand one (looking at the front of the layout); the floor of the well that carries the short cassettes has not yet been fitted. At the front corner it is possible to see the channel which sits over the extendable drawer runners.
The next photograph shows the base of the well in place, supporting a temporary cassette. I shall contrive a very simple locating system for cassettes. The track at the rear of the board will be a fixed track, a simple extension of a siding on the main board.
The third photograph shows this fiddle yard board
inverted to reveal the hole in the bottom of the drawer (on the centre line) which is used for clamping this boards to the main board. The clamps are simply one-hand ratchet clamps, size 50mm, bought from Wickes (fourth photograph).
The boards are contructed by glueing the ply, and this requires some fairly careful clamping to hold everything in place while the glue sets. In this sense "careful" means using set squares to align components, then lots of (cheap) clamps, with improvisation as necessary. The next photograph shows the left-hand fiddle yard clamped up
in situ to make sure that everything locates accurately, with a spacer bar to keep the laterally unsupported drawer bearers the right distance apart at the outer 'open' end. You can just see, wedged between the fiddle yard and the main board, a strip of thin polythene with a black squirly pattern (cut from a carrier bag) placed as a mask to prevent parts sticking together where this is not wanted. Careful masking is absolutely necessary when glueing
in situ, to avoid unintentionally ending up with a permanently and depressingly integrated structure.
The sixth photograph shows the "control desk"; this rather pretentious name translates as "box holding the controls for my train set", but it is a separate unit and so needed its own name. It is designed to sit on top of the right-hand fiddle yard in use and to be stored inside it for transit (the layout will be operated from the front both at home and if ever at an exhibition).
The layout will be operated using a Gaugemaster Prodigy Advance for train control, and DCCconcepts Cobalt Alpha electronics for points and accessory control using a mimic panel with a schematic diagram. The control desk accommodates the Gaugemaster and three Alpha components - the LED switches interface, the digital encoder, and the Adaptor / "Sniffer" unit. The irregular shape of the control desk is a result of "form following function". The control desk also acts as a partial screen for the fiddle yard. The schematic diagram seen in the photograph is a mock-up.
The dismountable control desk will connect to the layout wiring with loose cables. This method also allows for the same control equipment to be used on different layouts. The schematic mimic panel and the small shelf holding the handset both lift out to allow clear access to the electronics for programming, etc. and the schematic switch panel could easily be replaced with one for another layout. In use the whole unit is held in place with short removable dowels.
Clearly, there is still finishing work to do on the baseboards; I also need to construct a screen / information board for the left-hand fiddle yard, and fit LED lights to the lighting gantry. I now know that the main layout structure is viable, though, and should provide a good foundation for tracklaying, DCC and actual modelling (which are, of course, the scarier parts of the project).
Happy Christmas, and best wishes for 2018!
Richard