Allan Wallace’s Software

Allan Wallace’s Software

Dr Allan Wallace (PhD in mechanical engineering and fluid mechanics) runs his own engineering consulting company Avocet Consulting Pty Ltd in Adelaide, South Australia, that specialises in solving unusual and difficult engineering problems. Allan has undertaken several railway-related projects including the design of specialized rail freight wagons. Like Richard Coleby, Allan is an enthusiastic builder […]

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Porta Papers

A large number of paper covering a whole spectrum of topics about Modern Steam were written by Ing L.D. Porta, however most remain in hand-written manuscript form. The few that have been published include “Porta L.D., Advanced Steam Locomotive Development – Three Technical Papers” published by Camden Miniature Steam.  The papers included in this publication […]

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Books on General Steam Technology

Phillipson E. A.,  Steam Locomotive Design: Data & Formulae, repub. The Locomotive Publishing Co. Ltd., London, 1936, available from Camden Miniature Steam as a digital download. Quayle J.P., Kempe’s Engineers Year-Book, 90th Edition, Morgan-Grampian Book Publishing Co. Ltd., London, 1985. Haigh A., The Design, Construction and Working of Locomotive Boilers – an Engineering Appraisal, Express […]

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Books on Steam Development

Chapelon A., La Locomotive a Vapeur, English edition [translated by Carpenter G. W.], Camden Miniature Steam Services, 2000. Rogers H.C.B., Chapelon – Genius of French Steam, Ian Allan, 1972. Van Riemsdijk, J.T., Compound Locomotives, Atlantic Transport Publishers, 1994 Carney I.F., Fowler’s Fury – the Story of a Unique British Locomotive, Ian Carney & Noodle Books, […]

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Books on Modern Steam

Wardale D., The Red Devil and Other  Tales from the Age of Steam, fifth edition, pub. Camden Miniature Steam, 2017 (available through this website). Wardale D.,The 5AT Fundamental Design Calculations, pub. ASTT 2014 (available through this website). Koopmans J.J.G., “The Fire Burns Much Better ..” pub. Sheffield University 2006. Fozard A., ed., 5AT Feasibility Study,  […]

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Franklin Wedges

Franklin Self-Adjusting Spring-Loaded Wedges Self-adjusting spring-loaded wedges, supplied by the Franklin corporation, were designed to maintain zero clearance between axleboxes and horn guides, thereby preventing the shock loads or “knocks” that were once commonly heard from run-down locomotives as the clearances between axle boxes and hornguides were taken up with reversal of piston thrust. In […]

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Engine-Tender Buffering

Franklin-type Engine-Tender Buffer Mechanism A Franklin-type radial buffer provides a rigid connection between a locomotive and tender, allowing no relative movement in the fore-and-aft direction but allowing relative radial movement for negotiating curves. The diagram of a Franklin radial buffer (below) illustrates the basic principle where two wedges are pressed towards each other by coil […]

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Advanced Adhesion

A locomotive must be designed so that its tractive effort is not so high that it “loses its feet” on starting.  Equally importantly, its tractive effort should be limited so that it does not slip at speed. This latter becomes a much more important consideration for Second Generation Steam locomotives like the 5AT which maintain a high tractive effort at […]

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