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posted: 10 Oct 2017 06:49 |
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Damien Morris
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As being new to templot, found the video showing how to convert intersection into diamond.
Can you then convert the diamond into a double slip?
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posted: 10 Oct 2017 07:05 |
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Stephen Freeman
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Yes but depends on the angles being sensible of course.
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posted: 10 Oct 2017 07:10 |
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Damien Morris
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I'm trying it with the left one, and the angles are really shallow, but I think the one on the right will be tight. But it's only a single slip the 2nd.
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posted: 10 Oct 2017 07:35 |
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Damien Morris
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Here is some more info.
I am learning how to do the elements I need to design the layout, as there are other things I've yet to figure out how to get right. Like line up 2 different radius, so they meet without a flat edge / kink.
Can't attach the box bgs files...
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posted: 10 Oct 2017 08:01 |
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Damien Morris
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Sorted, attached.
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Attachment: conwaytemplot.box (Downloaded 78 times) |
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posted: 10 Oct 2017 17:33 |
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Rob Manchester
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Damien Morris wrote: As being new to templot, found the video showing how to convert intersection into diamond.
Can you then convert the diamond into a double slip? Hi Damien,
You can make double slips directly from the Tools>Make Slip>Make Double Slip menu option.
I suspect somebody may come and suggest you practice the basic aspects of Templot before jumping in at the deep end.
The track plan you have is from LNWR days ( no date but quite likely circa 1890 ) so you may want to consult later plans if you intend modelling the station in LMS or BR days.
Lovely location BTW.
Rob
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posted: 10 Oct 2017 17:37 |
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Martin Wynne
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Rob Manchester wrote: I suspect somebody may come and suggest you practice the basic aspects of Templot before jumping in at the deep end. Hi Rob,
Who might that be?
I am in fact just making some screenshots to reply to this shortly.
Martin.
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posted: 10 Oct 2017 18:21 |
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Damien Morris
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Quoting is not easy on this forum, rich text editor is not making my life easier Martin.
You can make double slips directly from the Tools>Make Slip>Make Double Slip menu option. Yes true, but I decided to make a diamond from intersection as i'm going over a drawing. I have not yet figured out how to adjust the angles on all 4 parts of a slip.
I suspect somebody may come and suggest you practice the basic aspects of Templot before jumping in at the deep end.
Dunno, does this count?
The track plan you have is from LNWR days ( no date but quite likely circa 1890 ) so you may want to consult later plans if you intend modelling the station in LMS or BR days.
This image I found, shows a Bedford TJ series? in the background. So Circa 1958-1975, goods yard still there.
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posted: 10 Oct 2017 18:36 |
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Martin Wynne
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Hi Damien,
Welcome to Templot Club.
What you have there is an irregular diamond-crossing (crossing angles unequal). It's possible to add slip roads to an irregular diamond-crossing, but it would always be a special by the design office, where space constraints leave no choice. For example a cramped station throat, or a complex junction. It's very unlikely to find one in a goods yard.
Further, it is on a curve, requiring that the crossing angle with fixed K-crossings is not flatter than 1:7.5 -- that's a very common size for a slip. Flatter angles* than that require movable K-crossings (switch-diamond) with the extra complications that means in the rodding and interlocking. Again very unlikely in a goods yard, especially in this case where the slip is little more than a set of trap points leading to a short spur headshunt.
The NLS don't (yet) have any large-scale maps for this location, so we can't use the new background maps functions in Templot.
However, old-maps.co.uk do have a 25"/mile map. Dated 1960, which means it has 100m OS grid lines, making it easier to scale for 2mm/ft. That's the publication date, not the date of survey which is probably around the 1930s. Unfortunately being a commercial operation they require a subscription fee before you can access their maps at a reasonable zoom, and also their maps are scanned to a lower resolution quality than the NLS. I have turned this North for South to match your map:
© old-maps.co.uk
I tried matching this, but it required a diamond-crossing of around 1:12, which seems very unlikely. I suspect it may in fact be a pair of turnouts toe-to-toe. Do you have any more photos of the location? I found this one, but it is not clear enough to be sure:
© linked from http://historypoints.org
I found that a B-8 and B-9 turnout fits quite well:
Which strikes me as a more likely fit, assuming the map is accurate.
See also this topic:
http://85a.co.uk/forum/view_topic.php?id=3080&forum_id=22&jump_to=22272#p22268
* 1:8 is the maximum, and then only if both roads are straight.
regards,
Martin.
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posted: 10 Oct 2017 18:39 |
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Damien Morris
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posted: 10 Oct 2017 18:43 |
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Damien Morris
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The 1900 is interesting Martin, wagon turn tabel and 2nd exit onto main line.
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posted: 10 Oct 2017 19:03 |
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Damien Morris
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Here is my current box bgs Martin.
I'm sure I should be doing some transitional curves in this.
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Attachment: Conwy.box (Downloaded 69 times) |
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posted: 10 Oct 2017 19:03 |
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Damien Morris
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and shapes file.
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Attachment: conwy.bgs (Downloaded 68 times) |
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posted: 10 Oct 2017 19:04 |
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Martin Wynne
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Hi Damien,
Thank you for the photo.
That's detailed enough to scale by counting timbers/chairs.
regards,
Martin.
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posted: 10 Oct 2017 19:12 |
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Rob Manchester
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Goods shed gone before the end of steam traction. Photo by late I.Vaughan
I think the photo you added earlier shows the goods shed out of use as the doors appear boarded and the lorry is parked where the track was that ran through it.
Rob
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posted: 10 Oct 2017 19:28 |
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Damien Morris
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Martin I've uploaded 5 images to the gallery, really interesting.
Rob I have that photo also, and I think that is 70s? Looks like BMC lorry.
All the lines nearly all up there. My post shows intact. Narrows it all down though
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posted: 10 Oct 2017 19:39 |
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Damien Morris
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What is really interesting is the diagram shows a pinch / narrowing, and so do the ariel photos in the gallery.
Now when I plot them in photoshop to measure, they appear to get too close to adjacent rail, as to block side by side carriage flow.
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posted: 10 Oct 2017 19:51 |
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Rob Manchester
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Damien Morris wrote: Martin I've uploaded 5 images to the gallery, really interesting.
Rob I have that photo also, and I think that is 70s? Looks like BMC lorry.
All the lines nearly all up there. My post shows intact. Narrows it all down though
Damien,
Steam had all gone by 1968 so it can't be later than that.
Rob
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posted: 10 Oct 2017 19:52 |
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John Palmer
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I downloaded the shapes file and found it to contain 100 bytes only - something wrong there?
I think this case illustrates the dangers of excessive reliance on the accuracy of ordnance plans' representations of track layouts. To my way of thinking, the photo in Damien's 18:39 post shows the yard track that ran alongside the Up Main diverging slightly from that running line the closer it gets to the Stephenson bridge, whereas the ordnance plan from old maps suggests instead that at this point the two tracks are converging. If these tracks are, in fact, diverging at this point then the effect would be to increase the angularity of the diamond and make feasible the double slip configuration clearly visible. Looking at the ordnance plan alone might lead you to believe that the crossing angle value is 1 : 8 or shallower.
Those curtain walls make a brilliant visual stop for a model!
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posted: 10 Oct 2017 19:54 |
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Damien Morris
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The OS maps you can see they are scans from paper, and the fold line is distorting / kink.
Look in the gallery for my areil photos.
What draw me to it John, also less to model. As it's nearly 4m wide.
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posted: 10 Oct 2017 20:06 |
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Martin Wynne
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John Palmer wrote: I downloaded the shapes file and found it to contain 100 bytes only - something wrong there? Hi John, Damien,
Damien you need to upload also the .sk81 image file. The .bgs file contains only the size and position of the picture shape container. It just shows blank white without the matching image file.
From the photo you posted it is clearly a bog-standard 1:8 straight-over-straight double slip, and can be created with one click in Templot. tools > make slip. This also brings the goods loop to its proper 10ft minimum way from the running line, which the OS map didn't show correctly.
The first turnout into the yard is a very tight 9ft-1:5, presumably to keep the switch off the bridge waybeams:
regards,
Martin.
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posted: 10 Oct 2017 20:20 |
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Damien Morris
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Thanks Martin.
I'm more inclined to trust the LNWR diagram I originally posted, as the ariel photos support it better.
The points into the signal depot is very tight, and the dummy vehicle doesn't fit.
I'm not clued up on goods rail spacing, is there a reason for 10ft?
I've attached the image background, resize to 3833.88mm to match DPI.
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Attachment: conwy templot 3833.88.zip (Downloaded 81 times) |
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posted: 10 Oct 2017 20:32 |
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Martin Wynne
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Hi Damien,
Attach the .sk81 file from your background shapes folder.
regards,
Martin.
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posted: 10 Oct 2017 20:43 |
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Damien Morris
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I only see dummy text file in the folders.
Edit: NVM found it.
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Attachment: conwy.sk81 (Downloaded 97 times) |