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Keadue (Keadew) re-appraisal

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Mayner

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  • 7 months later...

John @Mayner, just found your writings here about Keadue, after re-reading your RMWeb blog from 2013-2018 (which I saved to 64 pages in two PDFs).  Grateful for all your teaching through your writing and photographing.  Inspiring me to plan for building my own C&L / MGWR modular layout in 2024, starting perhaps with Dromod.

I'm wondering if you could guide me about four questions that remain unanswered (or that I missed):

1.  Stewart Hine's 1970s MR article about DPDT switches for layout sections -- might you have a more specific citation that I could pursue?

2. Did you ever decide upon an optimal wider dimension of depth than the 12 inches of the shelf layout?

3. What minimum radius of track curve would you recommend for a Worsley Works ex-CB&P 2-4-2T locomotive model or your Branchlines C&L Stephenson 4-4-0T?

4. If you were to re-design Keadue for enjoyable operation, based on what you've learned, what specific new features would you include, or change?  (I note the problem with the carriage shed area's MDF warping the track plane, for example, because it became over-soaked.  But I'm also reading a lot of complaints about insulation foam as a base, even with a plywood substructure.)  

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NorthWallDocker quite flattered that my writing about Keadue inspired you to build a C&L/MGWR layout.

1. I don't have anything more specific on Stewart Hines Model Railway Magazine wiring article, but may be covered in his  "Model Railways' Haynes explains series 1977. https://www.amazon.com/Model-Railways-Haynes-explains-Stewart/dp/0854295461/ref=cm_cr_arp_d_product_top?ie=UTF8 

I decided to try similar principals on Keadue using Blue Point machines with locally operated points and walk around control, eliminating the need for a control panel and section switches.  The only section switches on Keadue are a number of switches that allow locos to be isolated on the turntable loco shed road.

1. Wiring

Probably simplest to explain through wiring diagram of the crossover between the Main-Line and the yard at the Boyle/Sligo end of the yard, the arrangement at the Arigna/Ballinamore end of the yard is similar. The layout is currently controlled by two hand held controllers (1 Gaugemaster, 1 club project) that plug into DIN sockets in the baseboard fascia.  Two sockets feed the main line at either end of the station, the main line feeds are conventionally wired at the toe end of the crossovers from the Main Line to the Yard.   A third socket feeds the yard through a "heel feed" to the loco-shed road, locos on the yard are controlled by the "Yard Controller" when the crossover between the main and yard is normal allowing a train to run on the main line under control of the main line controller while another loco is shunting the yard.

Reversing the crossover points allows trains to arrive and depart from the loop using a main line controller while simultaneously allowing locos to move/turn in the loco yard.

LinkedSectionControlusingBluePoint.thumb.jpg.095ffb220d27b96b773aeefe30aed7ce.jpg

I used the Blue Points on Keadue to test the concept for more complex application, using for routing power using the auxillary switches on Tortoise Switch machines on a future layout potentially using signals to control track power, but that's another days work!

2. Shelf baseboard width.  I tend to use 12" as a maximum baseboard width on shelf or book case layouts in both N and 4mm, the relatively narrow baseboard with also helps make scenic sections look longer. I have set up 18" wide shelf baseboards for a future layout, (on extended  proprietary brackets), currently used for storage has shown no signs of movement in over 10 years!

3.  Minimum radius. The 90º curve on the Tramway Section is approx. 2' radius, though may be tighter in places. The Branchlines C&L 4-4-0T was designed with the bogie which slid on a central pivot complete with side control springs, which could be challenging to set up and reduced side to side movement. I converted both my C&L 4-4-0s to a more conventional bogie pivot arrangement, though the bogie wheels sometimes short on the inner edges of the whitemetal outside cyliners.

Its likely to be more challenging to identify a workable minimum radius for the ex-CBPR 2-4-2T with their long wheel base and radial trucks fore and aft. I usually drawn or prepare a mock up of the chassis and wheels to check clearances on curves before assembling a loco. It may be worth contacting Phil 3150 who built a model of 10L from a Worsley Works set of parts.  

4. Learnings:  Keadue has evolved considerably during the 20 years since we moved to New Zealand. Originally intended as a self-contained shelf layout designed to fit an 8'X1' space in the home office and a test bed for readily available baseboard material and foam track underlay. The layout was extended to an L shaped terminius to fiddle yard (11'X6') shelf layout with scenic works substantially complete just in time for a Model Convention in which delegates visited the layout 8 years later!  Apart from maintenance and some additional stock I have done very little work on Keadue since the convention.

The main lesson has been not to use MDF as a trackbase material if planning to use water as a wetting agent when gluing down ballast, at the time I used MDF as it was difficult to source good quality stable plywood from builders merchants or DIY superstores. I now buy ply from a specialist ply and veneer stockist.

Although I have an almost life long interest in the C&L, I tend to switch between projects, scales and prototypes which had a knock on effect on Keadue.

 

 

 

Edited by Mayner
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I used the Blue Point point control, on our club layout Bantry, to avoid having a central control panel with lots of wiring and to keep things simple. They are hand worked with bicycle spokes and we are very happy with them. So far no failures, that is a rather fatal statement to make!  😎

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