I understand that the "Inside Rail to Inside Rail Distance" (gauge) is used in cant calculations but I do not know where the "Centreline Rail to Centreline Rail Distance" is used within the software? The help file is not very helpful in this regard (see below).
These settings are used when placing rail tracks with the "Create rails" command.
That command previously included "Left rail" / "Right rail" sections for setting rail offset from the centerline etc. - now this is being set in the rail settings you've mentioned
Answer Verified By: Rick Vandoorne
Superelevation, Cant deficiency and Cant excess - (1) Superelevation/cant(a) The equilibrium superelevation/cant necessary for any speed is calculated from the formula
Where C is cant/superelevation in mm. G is the gauge of track + width of rail head in mm. R is the radius of the curve in metres.
Here G is called Dynamic Gauge , is used in calculation of Cant
G is considrered as Rail Center to Rail center Distance, For Standard Gauge (gauge width of 1435mm) it is considrered as 1510, but it varies on the Rail Head width used.
it is dynamic gauge (G)used in calculation of cant in the above Formula
The above formula for cant calculation is based on India Standards.
But some country standards use Gauge width (w) instead of dynamic Gauge (G) in the Empirical Formula for calculation of Cant.
Thank you for the responses. So the centreline-to-centreline distance (or dynamic gauge as referred to above) is used in the cant calculation. Then I assume that the inside rail to inside rail (commonly referred to as gauge) is used simply for placing the rails in the 3D model.
Not really to place the rails because rails are placed using rail center as well, but they are important lines (inside edges) that are often mandatory in rail design. So the create rails command now creates both rail center, inside edge and mesh
On this related question. What is the Centre of Gravity? And does it change with Gauge?
I am currently working on a dual gauge/Narrow Gauge alignment and need to set up create rails for Standard and Narrow Gauge.