Andy is a chartered engineer and was the senior engineer at Progress Rail's manufacturing headquarters in Sandiacre, Nottingham (previously Balfour Beatty) for 24 years. He is now a freelance specialist in the design and development of special trackwork.

What do the icons mean? The icons represent 6 key processes in the engineering of S&C. Hover over the icons to see what they mean.

The documents below provide more detail. They are downloadable as .pdf files.

Andy's illustrated CV.

A selection of the mathematical and virtual modelling tools developed and maintained by AFL.

BLIPS is a time-saving tool for evaluation of plan-view track geometry including S&C.

Handook describing the principles and assumptions underpinning the analysis of switch flexure.

Research exploring the placement of actuators and detectors in switches and their contribution to safety and reliability.

For switches with mechanical supplementary drives, analysing the stroke losses due to intentional and unwanted lost motion requires a more complicated approach.

Poster outlining the different ways to define switch machining, and describing AFL's tool topVB for generating profile drawings.

AFL also uses 3D modelling to generate virtual switch designs and then export profile drawings principally for vehicle dynamic simulation through S&C.

Thermal and bulk lifting track behaviour requires a grillage-type model, as shown in this poster.

In support of a better ruleset for unguided passage through obtuse crossings, Andy worked on a variety of desktop studies.

The principle and mathematics of CESuRa are actually quite straightforward. This leaflet describes how.

In a brief summary, this leaflet touches on why CESuRa is beneficial and where it could be applied in future.

Making a track panel curvable in real time in both vertical and horizontal planes is possible. A univeral joint for the railway?

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Thanks to Matt Lax for help with website. Web page last updated 26/02/2018 by webmaster