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To-Scale Switches and Slips (part.1), by Dr. Norbert Aust (Switchdoc)
 Read | Write  comments: 9 Posted Sun May 04 2003 3:09pm
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You will find the following data in the table:

Radius in meters ¹Angle²Length³Max. speed km/h / mphhint to switch usage
190 - 1 : 7.57.592540 / 25connecting very secondary sidings
300 - 1 : 96.343350 / 31shunting traffic
500 - 1 : 124.764265 / 40platform for stopping trains
760 - 1 : 144.095580 / 50trespassing freight trains
1200 - 1 : 18.53.0965100 / 62trespassing passenger trains

¹ denomination giving radius (m) and ratio of deflection (not sure of my wording here)
² angle of deflection in degrees
³ roughly length from beginning of points to frog

Please note: Selection is based on what is required in the branch. A switch 190 - 1 : 7.5 can be passed with 100 mph on the straight main track while the branch is leading to some derelict siding.

I decided to stick to these types only because with all of these the circular arc of the branch ends near the frog. This has some advantages to our designing procedure as we will see later on.

Single and double slips I use with the same angles and with some reduced radii as will be shown later. This is a little bit different from real life but this simplifies the tracklaying considerably.

Basic Concept of my Procedure

Due to the generous possibilities in track laying that Trainz offer to its users it is very difficult and complicated to design individual switches that you put together to get the complete layout in the end. But it is absolutely easy - indeed very simple - to lay different pieces of track and connect them to switches afterwards. Bearing this in mind I developed the method described in detail later on, that leaves us all the possibilities to design on the spot any switch we like but can be performed very rapidly:

1) Lay down the tracks bearing the traffic, these are tracks to platforms, for loading and unloading, stow away unused cars, anything that carries vehicles and is no connecting track.
2) Lay down the connecting tracks, these are tracks just to connect switches. We will place them according to the switch's geometry. If the distinction between 1) and 2) is not very clear now, the example will clarify.
3) Connect 1) and 2) at the appropriate positions to form the switch
4) Remove superflous pieces of track
5) Attach drive and name the switch

This sounds complicated at first sight but you will find after some practice that it could be done very rapidly

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