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SM-25-6

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  1. Gentlemen, I am writing from Graz, Austria and I am interested in the history of diesel engines and diesel locomotives that were produced in various Austrian companies. In this thread, the "Graz 0-4-0 Diesel-Hydraulic Locomotive" was already discussed. On-line, I could also find an article on the LNER Website at https://www.lner.info/locos/Experimental/Graz040.php. During my own research work, I came across some more details of this locomotive. First of all, here is a drawing of the locomotive that also shows the installed diesel engine: http://www.haflinger-4wd.com/offtopic/Motorlokomotive_Web.jpg On the upper left side, I think that the text says "60 PS Grazer Motorlokomotive mit hydraulischem Lentzgetriebe" (60 HP engine-powered locomotive with hydraulic Lentz-transmission, made in Graz). On the bottom left side, there is the company name stated: "Grazer Waggon- und Maschinenfabriks AG vorm. Johann Weitzer". Johann Weitzer, born 1832, was an entrepreneur who founded a carriage manufacturing company in Graz in 1854. In 1895, the company became a stock company and was renamed to "Grazer Waggon- und Maschinenfabriks AG vorm. Johann Weitzer" (Graz carriage and machinery manufacturing company, formerly Johann Weitzer). The company started building diesel engines in 1900. Years later, the company was merged with other companies to form Simmering-Graz-Pauker in 1941. In 1923, the abovementioned diesel-hydraulic locomotive was delivered to England. It had an operating weight of 19 tons and was designed for standard gauge. The engine type was a "SM 25/6", an in-line 6-cylinder diesel engine (bore 200 mm, stroke 250 mm, nominal speed 300 rpm, Power 60 HP, BMEP approx. 3.8 bar). The information I have is from a doctoral thesis from 1967 that deals with the historic development of diesel engines for locomotives in Austria. There is a reference to "The Railway Gazette" of 8th of August, 1924, in which the locomotive is described in detail. I do not have this publication, is there possibly anyone who can provide a scan of this historic article? In this thread, there are also references to other publications of that time. Can somebody possibly provide me with scans of these magazine articles? It would be great to hear from you! Thanks and kind regards, Constantin
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