page_title: Engerth locomotive
section_title: Preservation
hierarchical_section_title: Engerth locomotive / Preservation
caption_attribution_description: en: Mariazellerbahn vintage train "Panoramic 760" with steam engine Mh6 in Mariazell station, Styria, Austria. de: Schmalspur-Touristikzug "Panoramic 760" mit Museumslokomotive Mh.6 im Bahnhof Mariazell
context_page_description: The Engerth locomotive was a type of early articulated steam locomotive designed by Wilhelm Freiherr von Engerth for use on the Semmering Railway in Austria. The distinctive feature of the Engerth design was an articulated tender as part of the main locomotive frame. Some of the weight of the tender therefore rested on the driving wheels, improving adhesion, while articulation allowed the locomotive to navigate the narrow curves of mountain railways.
context_section_description: One example of the Engerth type is preserved at the Swiss Transport Museum in Lucerne. This locomotive, No.28 Genf an 0-4-6 T built by Maschinenfabrik Esslingen in 1858 to work the Schweizerische Centraalbahn (Swiss Central Railway). She retired from active service in 1899 and was used as a static boiler at Olten. She is the oldest locomotive in Switzerland.
  Buštěhradská dráha (Buštěhrad Railway) locomotive 103 Kladno is preserved in the National Technical Museum in Prague, Czech Republic.
  All six of the narrow gauge NÖLB Mh or 399 class Engerth locomotives survive in Austria. These 760 mm (2 ft 5 ¹⁵⁄₁₆ in) gauge 0-8+4 (D2h2t) locomotives were built by Krauss for the Mariazellerbahn in 1906 and 1908. When the Mariazellerbahn was electrified the Niederosterreichische Landesbahn (NOLB) transferred them to their Waldviertler Schmalspurbahnen system at Gmund. When the ÖBB took over in 1922 the locomotives were redesignated the 399 class.
  Mh1 / 399.01 (5431/1906) is part of the ÖBB heritage fleet. It is currently based at Gmund, ÖBB-Erlebnisbahn.
  Mh2 / 399.02 (5432/1906) is part of the ÖBB heritage fleet. It is currently based at Gmund, ÖBB-Erlebnisbahn.
  Mh3 / 399.03 (5433/1906) was sold to the Pinzgauer Lokalbahn. It is currently based at Zell am See.
  Mh4 / 399.04 (5434/1906) is part of the ÖBB heritage fleet. It is currently based at Gmund, ÖBB-Erlebnisbahn.
  Mh5 / 399.05 (5924/1908) is privately owned. It is currently based at Heidenreichstein on the Waldviertler Schmalspurbahnverein (WSV)
  Mh6 / 399.06 (5925/1908) is preserved on the Mariazellerbahn in Austria.
  Chemins de fer du Midi 0-6-4 T locomotive no.312 L'Adour is preserved at the Musée Français du Chemin de Fer, Mulhouse, France.
caption: Engerth locomotive Mh6 on the Mariazellerbahn
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