NEW polystyrene patterns for ‘Hall’ No. 4930 Hagley Hall’s replacement cylinders have been sent to Shakespeare Foundry in Preston for casting, which should begin on
It marks the culmination of a highly skilled programme of research and design by Elliot Powick of Stafford Road Design, who has used advanced Computer Aided Design (CAD) techniques to model a complete front end for the ‘Hall’.
With no drawings to work from, Mr Powick used photographs and measurements to create the basic CAD design, then modelled the full spread of valve gear and ancillary parts to find where there were blank spaces, and engineer them accordingly.
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The result was a fully functioning 3D digital model of a ‘Hall’ front end, which proved the design worked. It is the first time such a technique has been used to create a new cylinder design, and paves the way for its adoption for future projects.
The new patterns were manufactured by polystyrene specialists Premier Patterns, and subject to successful casting, the Friends of Loco 4930 Hagley Hall hope to have the new cylinder castings on display at the Severn Valley Railway’s Open House Weekend in Bridgnorth Works on April 7-8.
■ At the end of January Premier Patterns also completed the new cylinder patterns for Dinmore Manor Locomotive Ltd’s ‘2884’ 2-8-0 No. 3850, currently under overhaul at the Gloucestershire Warwickshire Railway.
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