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Module Standards
Track
Ground Zero Height (the top of the railhead) shall be at 1200mm from the floor and adjustable by plus and minus 10mm.
Minimum curve radius shall be 400mm (15.8"), and maximum gradient shall be 2 percent. Reverse ("S") curves are to be avoided.
Points shall be of minimum No 6, PECO Finescale recommended. Mainline shall go through the straight line of the point. Double slip points are prohibited on the mainline, but X crossovers may be employed.
Track Alignment/Joint
The front mainline track shall be aligned by having rigidly mounted track to the exact edge of the module, with the track fixed to copper clad PCB mount of minimum size 35x10mm, mounted securely to the edge of the module. Care should be taken to keep the rails level right up to the edge. Do not force the rails lower at the module end when screwing the PCB down. Add packing underneath so that the rail top remains level.
The track ends should be bevelled for 5mm from the ends as shown in the diagram. This will make alignment easier. When aligning two modules a track gauge will be used to ensure alignment especially where the end points are hard to see. Front track ends should be protected during transport and storage with a cap piece over them to avoid damage
Diagram
The return track shall be 545mm from the front of the module to the railhead of the front rail. The return tracks shall be connected by a joiner rail consisting of a 124mm length of Atlas set-track The Atlas rail jointers should be soldered to your rail ends.
Note that the rail jointers provide mechanical connection - power connection is via separate connectors as discussed below.
Clearances
Track clearance (to tunnels, structures, scenery) on the mainline, sidings intended as mainline passing sidings and the return track shall be governed by the following profile, and the entry/exit hole in the endboards shall conform to this size exactly. Tighter clearances are not recommended, will be allowed in local yards where it can be shown that NZR operating procedures indicated such non-standard clearances (and hence limited running rights) for the prototype location being modelled. In this case the module must carry a diagram attached to the rear of the backscene outlining the areas of tighter clearances and specifying the rolling stock that can and cannot use the restricted area.
Diagram showing 40mm width and 35mm height above rail top..
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