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  • The Plug Track functions are experimental and still being developed. Some of the earlier pages of this topic are now out-of-date.

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    Some pages of this and other topics include contributions from members who are creating and posting their own CAD designs for 3D printing and laser-cutting. Do not confuse them with Templot's own exported CAD files. All files derived from Templot are © Martin Wynne.
  • The Plug Track functions are experimental and still being developed.

    For an updated overview of this project see this topic.   For some practical modelling aspects of using Plug Track see Building 3D Track.

    The assumption is that you have your own machines on which to experiment, or helpful friends with machines. Please do not send Templot files to commercial laser cutting or 3D printing firms while this project is still experimental, because the results are unpredictable and possibly wasteful.

    Some pages of this and other topics include contributions from members who are creating and posting their own CAD designs for 3D printing and laser-cutting. Do not confuse them with Templot's own exported CAD files. All files derived from Templot are © Martin Wynne.

Bog Junction

Quick reply >

Matt Rogers

Member
Location
Sheffield
Hi All

It's been a long (Long) time since I last picked up Templot, since my first stab at P4 with a long since abandoned project, Blackwell road. Several house moves, passing through not only an engineering apprenticeship, but going on to complete degree in Engineering and a move from Devon to Sheffield, all conspired to sink that particular project.

Well things have settled down somewhat, and so I've been on the lookout for a new project, to finally get something running. My requirements were fairly (un)reasonable. Time period is pretty easily set; BR LMR, Northwest England, Circa Later 1973 - 5th May 1974. But I wanted to model an actual location, trying to design something fictional with Blackwell Road had left me dissatisfied. Diesel Depot layouts are fairly common, so I wanted something different. Something with AC Electrics (Hence the time period). So that pretty much limits me to somewhere on the WCML between Preston and Carlisle. A Tall order, granted. The WCML doesn't lend itself to being condensed into a small space, especially in 4mm. To cut a long story short, I've looked at a few places, but the railway is a big place. It's surprising how even the most simple of passing loops ends up being a 6m+ monster. I considered trying to condense an area, Carlisle Platform 1 with it's handy back wall, and siding for various forms of traction and rolling stock. But even that ended up being 5+ meters. But to cut a long story short.

Bog Junction 1996

The view above is from Gordon Thomson over on Flickr, and shows Bog Junction in 1996, viewed from the Currock Road Bridge, facing East. The lines in the foreground go to the now defunct Goods Avoiding Line (Left) and of towards Mayport and Workington (Right). The lines in the background come from Newcastle/ S&C (Left) and WCML to the south at Upperby. There are two bridges in the background, although the furthest one is hidden from view, the First carries the Maryport and Workington line into Carlisle Citadel Station, the hidden bridge carries the WCML into Carlisle Citadel. According to some early measurements on Google maps, the area should fit onto two 1650mm long baseboards, totalling about 3.3m using the Currock Road and WCML Bridges at scenic breaks. During the period I wish to model, the Line from the Background Right, and leaving Foreground Left would have been strung with OLE. However this was removed after the Accident in 1984 which demolished the bridge carrying the avoiding line, since then the knitting has been removed and all freight now passes through the station.

Aim is to do this very much as a photo plank, but eventually to loop ether end into a roundy-roundy exhibition layout. But first, a track plan for the area, then I can work out baseboards. Hardest part of this so far, seems to be finding pictures of the area with the OLE in place. Although I have learned that the area was also used for crew changes, with staff walking down the embankment on the left, behind the buffer stops in high wapping sidings near Carlisle PSB.

I'd be eternally grateful to anyone can might be able to pick out details of the trackwork from the avoid image, crossing angles, switch blade lengths? I'm so rusty I'm not even sure where to begin.

Regards

Matt
 

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@Matt Rogers

Hi Matt,

Welcome to Templot Club. :)

Working from OpenStreetMap isn't very reliable -- unless you have edited it yourself to match modern aerial imagery (which is easy to do, I should make a video).

However, the photo shows the alignment hadn't changed much from the historic maps -- which it can't do if it has to fit through the original bridges. Here is a quick stab on the 1899 georeferenced map. Cross-fading to modern aerial on the NLS web site shows a good match.

bog_jnct_try.png


It's almost certainly BS-110A/113A inclined FB pointwork, and CC-8.5 turnouts make a good fit. It's something to start from at least.

I used Templot's experimental "clarity improvements" on the 25" map captured from the NLS, as you can see. The results are variable and call for some trial and error.

The NLS have a slightly better-quality later map from 1924, but it's not available georeferenced, so would need some adjustments to match the above:

bog_jnct_1924.png


There is an even better wartime map from the 1940s, but unfortunately those maps have the railway lines blanked out.

cheers,

Martin.
 
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Hi Martin,

Thanks for that. I was struggling to import the correct maps from NLS, but hadn't twigged it was due to it not being georeferenced. I'm half tempted to purchase a print of map, but I'm not sure i'll find it that useful. Certainly it looks far better than the OSM.

The line to Maryport was closed and the track removed in 1968, but was reinstated in 1973 due to the change of importing iron ore at Redcar not Workington, so as you say the track geometry has to have stayed almost exactly the same in order to pass through the existing bridge structures.

Any chance I can get the files off yourself? And being a bit rusty, can Templot display the modern planed checkrails?

Regards

Matt
 
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Small Update,

Been on and off at this over the long weekend, managed to get the NLS Map in, and this is much easier to work too. Hopefully not to bad for a first attempt, a few mistakes I'll try to correct on the Mark 2 version, and from there I can try to work out how to turn it into a roundy-roundy.

Thinking about it from a presentation point of view, I imagine the viewing side would be north looking south. But Obviously the long straight might be somewhat unappealing, especially if parallel to the baseboard edge. So I was thinking about angling the long straight across the baseboards, but I'm interested in others opinions on the matter.

Bog Junction Templot.JPG


Still on the hunt for photo's of the area with the OLE Masts in place. In the meantime, I have access to roll sheet plotter at work, I'd like to print off the above, to get a sense of scale.

Regards

Matt
 

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Last edited:
Hi All,

After a bit of a battle, managed to output a PDF, which I shall have a go at printing tomorrow. It's rough and ready but I can at least use it as a rough approximation of baseboards and how much space they'll take up.

Regards

Matt
 

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Hi All,
It's been extremely hectic at work of late, but things should be slightly calmer this week, so I thought I'd progress Bog Junction Mk2. However ran into a bit of a snag. Went with curviform vee's for the turnouts to the South Curve Goods lines, as judging from this image: Bog Junction Flickr and an Image from the Cumbrian Railways Association (which for copyright reasons I cannot post here). The route through the crossings is smoothly curved. However, I've ended up with the toes of the switch rails very closely sligned with eachother on both turnouts:

Turnout switch alignment..JPG


Where as, the prototype seems to have them about 3-4 sleepers apart. I assume I've bodged it somewhere when trying to make the two diverging routes, I'll have another crack tomorrow.

Regards

Matt
 

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Hi Matt.
The toe of the switch of the inner curve of such a junction will normally be in advance of the toe of the outer one to allow for an increase in track centers between the curved roads.
Regards
Tony.
 
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Hi Matt.
The toe of the switch of the inner curve of such a junction will normally be in advance of the toe of the outer one to allow for an increase in track centers between the curved roads.
Regards
Tony.

Also to allow for no conflict in the rodding runs.

cheers,

Martin.
 
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Hi Gents,

Thanks for the confirmation, I'll endeavour to see if I can't get the junction to look right some time this week. If I can finalise the main layout, I can commit to appropriate baseboard sizes before I rope Tim Horn into laser cutting them.

Regards

Matt
 
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Morning All,

Been looking at a Mk3 version of Bog Junction, but I thought I'd approach the layout from the other direction, and start with getting the fiddleyard set out.

1687341566337.png


Starting with 8 lengths of 3.6m track spaced at 50mm (giving a bit of finger room), condensing into 4 running lines, which will be paired into WCML South, WCML North, Newcastle and Maryport lines. At the moment the 4 tracks end up equally spaced, but begs the question, should they be?

I'm sure I've seen a dimensioned layout for four track spacing but can't seem to locate it, and hazy memory suggests 6ft between running lines, 10ft between pairs of running lines?

Regards

Matt
 

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I'm sure I've seen a dimensioned layout for four track spacing but can't seem to locate it, and hazy memory suggests 6ft between running lines, 10ft between pairs of running lines?
@Matt Rogers

Hi Matt,

Yes that's correct. Multiple running lines alternate at 6ft-way and 10ft-way (11ft-2in and 15ft-2in track centres) minimum. Exactly which line is paired with which does vary, but it's the spacing which is important.

It's for the safety of train crew so that they can safely climb down from a stationary train on one side or the other. Also for p.w. staff and others on the ground, and clearance for signal posts, etc.

Generally it is 6ft-way between main up and down running lines, and 10ft-way for loops and sidings alongside. But where you have 4 running lines, you can save 4ft of trackbed width by having a central 10ft-way and 6ft-way each side. That would then mean Up Fast and Up Slow at 6ft-way, with 10ft-way in the middle from the similar Down lines. Prototypes vary. Within yards and sidings the spacing can vary a lot.

cheers,

Martin.
 
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Thanks Martin,

I've increased the space between the pairs of running lines as they exit the fiddleyard side, as I have some thoughts on 're-using' the fiddleyards on other projects (but we'll see how that pans out).

1687418382335.png


I had been struggling with the creating links function, which I think was struggling because the templates i was using already had an easement transition to the straight fiddleyard roads. Problem overcome by shortening the template, and then adding another template to the end, and using this template for the link creation.

Regards

Matt
 

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Another small session during my lunch break today.

1687783438420.png


Something resembling a very basic fiddleyard is now in place, while all the pointwork is not in place, this will allow me to design some baseboards and think about the operational considerations. I will need some additional points to route traffic to the inner fiddleyard roads, as almost all traffic will exit towards Kingmoor, and probably a way to do the same on the opposite site. But this can be added later.

I feel I've reached a major milestone with the import of the NLS OS Map tiles, once I remember how to rotate and position bog Junction correctly, I'll be able to start the hopeful third and final version.

Regards

Matt
 

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