I wouldn’t want to be walking through the gangways when the train was using that line!
I think you could improve things a little by moving the turnout on the mainline further away from the diamond crossing. Exchange the position of the turnout and the short straight length. A second equal short straight will then be needed in your by-pass loop.
Moving the turnout on the mainline further back again would be even better. If you did that, you would have a straight section on the by-pass loop long enough to take the connection to the sidings off there.
Good morning 40057
As you were kind enough to make this helpful suggestion, I popped out to the modelling room earlier to explore your proposition.
To remind ourselves of the layout of the junction, here’s one as it stood, the short reverse curve standing out like the mid section of Max Wall’s legs:
Before I address the rearrangement of the turnouts that create the presence of a precarious reverse curve as you have correctly observed, I just want to direct you to the ‘entry’ point of the junction with specific reference to your suggestion of moving the entrance points as far away as possible from the terminus to minimise the effects of a reverse curve in this situation.
The problem here is that the further most point of the junction/station throat from the terminus is governed by the turnout that marks the exit point of the return loop as (hopefully) can be seen here:
The turnout to the left of the picture is the exit from the ‘loop’, that to the right, the entry to the junction on the up line (the furthest point from the terminus). Here is an elevated view:
Respectfully, as can be seen, all I would gain here is a couple of inches following the removal of the short section of track between, which I would be reluctant to do as it was placed here deliberately to separate the turnouts involved. This formed one of the list of ‘must haves’ prior to drawing out the track plan. Why? Well, it was to combat one of the many annoying issues with proprietary track recalled from childhood memories, and that was the derailment of trains when turnouts were placed immediately back to back, especially at speed. I remember that placing a straight section of track in between seem to resolve the issue, thus this became a rule at Monks. So I think I’ll leave well alone.
Now to the rearrangement.
I suppose it would be simplest to start by saying I achieved your excellent suggestion, 40057, but via a slightly different arrangement. In the end, however, the same outcome has been achieved: the ‘lengthening’ of that darned reverse curve(!) and a more gainful approach to the Van sidings.
This was achieved by removing the left handed turnout immediately prior to the diamond and thus the ‘lead’ to the reverse curve, and replaced with a piece standard Hornby straight of the same length.
The turnout which became an addendum to facilitate the van sidings to the left of the station, and which I sited just prior to the turnout which I removed, now became the entry to the reverse curve, lengthening the curve in the process as you were advising.
The ‘bespoke’ curve fashioned from a Hornby double length curve of 3rd radius which formed the reverse curve, was then joined to the diverging road of the turnout, to form a link between this turnout and the one at the terminus end of the diamond crossing to complete the lengthened reverse.
Now, in between was placed another left handed turnout to form a straight section and also a point from which a road could be taken to form the van sidings, which left just a minor gap, completed by the insertion of another standard short section of Hornby track (I’m so glad I invested in a variety of lengths of Hornby track when purchasing other bits n pieces from a supplier….).
The setting out of my amendment to the ‘loop’ with the right hand turnout prior to the diamond still in place and the ‘bespoke’ curved section now joined to the turnout that was the proposed lead to the van sidings:
The standard shirt section added to complete the reverse curve ‘loop’ (with slight gaps left between joints as a defence against excessive expansion due to increased heat in summer in there):
The standard curve fitted at the end which will lead to the van sidings can also be seen.
An overall view of the new layout:
Many thanks once again 40057 for your valued contribution and to those WT-ers have flattered me with ‘likes’ and interest; I sincerely hope and trust the above wasn’t too confusing.
Now to get on building it lest I have to change the title to: ‘a layout for the Great Grandchildren’.
jonte