Downloads and Links

There are several items, including three simulators, of particular interest to the valve gear student, all downloadable without charge. To download or link as appropriate, simply click the blue highlight.

• Don Ashton's design spreadsheet in Excel for Stephenson's Gear
• Don Ashton's design spreadsheet in Excel for Walschaerts Gear
• Allan Wallace's Simulator program can be downloaded here or at http://www.avocetconsulting.com.au/modeleng
• Prof. Bill Hall's Simulator programs are on the SMEE website. Download Steph and Wal here or at http://www.sm-ee.co.uk
• The late Charlie Dockstader's Simulator collection is available via http://www.bcwrr.org/memorials.html.
• Don Ashton's documentary supplement concerning Stephenson's offset trunnion rationale, particularly in the use of the design program. (Word doc)

Don Ashton's book DESIGN PROCEDURES for WALSCHAERTS' and STEPHENSON'S VALVE GEARS is available at

• www.camdenmin.co.uk 
• www.teepublishing.co.uk 
• www.ploughbooksales.com.au

• Prof. Bill Hall always took great pains to verify theories by precise experiment and produced a particularly useful program to calculate the benefits of superheating and enabling IHPs at various speeds and pressures to be evaluated.  PERFORM is available here

• H.S.Gowan, a most methodical and knowledgeable Canadian National Railways engineer, wrote a definite design document on Stephenson's valve gear for the SMEE Journal in 1975. With due acknowledgment this is downloadable here as a Word document with accompanying diagrams. The diagrams may be enlarged within Word. Download Gowan

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