The tangent method of bending turnouts
A (bit) more accurate alternative method to calculate the equivalent radius for bending turnouts is based on the tangent defined by the crossing angle…
Straightening the equivalent radius
If we consider a circular curve of radius R2, tangent to a straight and mark the offsets O1, O2 and O3, measured perpendicular from the circle to the straight and placed at regular C/2 interval we will get something like this: The offsets O1 and O3 are the bases of a trapezoid and O2+V2 is…
The Faith of TGSD Calculator
Motto: “I am not the Messiah!”, Brian [Later edit: I wrote this during the pandemic, not in a very happy state of mind, nostalgic about good old and normal times, and dreaming of white whales. It is a personal opinion and, to a degree, an expression of powerless frustration. Don’t take it too seriously!] For…
Rail thermal forces for jointed and CWR track
This is the presentation I gave to the West of England Section of the Permanent Way Institution:
An introduction to rail thermal force calculations
I feel very honoured and proud to see the article “An introduction to rail thermal force calculations” I wrote with my friend, Levente Nogy, published and featured on the front cover of the Journal of the Permanent Way Institution.
Track Quality Measurement and Inherent Design Standard Deviation
This is the presentation I gave to the Glasgow Section of the Permanent Way Institution: Track Quality Measurement and Inherent Design Standard Deviation Later note: Some fundamental things stated in this presentation need to be revised.
Flange tip lift crossing
The crossing is the track arrangement which ensures the intersection of two opposite running edges of a turnout or diamond crossing. It usually has one crossing vee and two wing rails (BS EN 13232-1:2003). The crossing, in the common setup, has a gap section to allow the passage of the wheel flange on both directions. The safe…
A railway track blog 