Friedrich Ludwig Middendorf

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Friedrich Ludwig Middendorf (born March 20, 1842 in Bardenfleth ; † February 12, 1903 in Berlin ) was a German mechanical engineer , ship designer and, from 1890, technical director of Germanischer Lloyd AG .


Friedrich Ludwig Middendorf was the son of Bernhard Dietrich Middendorf (1819–94), master shipbuilder and owner of the shipyard “Harmonie” in Leer and his wife Gesine Fröhlich (1818–93) from Bremen. After attending school, Middendorf completed a three-year apprenticeship at his father's shipyard in Leer as well as some sea voyages. He then studied mechanical engineering for three years at the Hanover Polytechnic . From 1863 he worked as an engineer at the Reiherstieg shipyard in Hamburg , but in 1865 he switched to the C. Waltjen & Co. shipyard in Bremen as a production engineer. Until 1890 he worked there as a senior engineer and authorized signatory. During this time he was responsible for the design and construction of all merchant ships as well as eleven of the 18 planned gunboats of the wasp class. The new ships under his management include:

In 1890 Middendorf took over the position of technical director of the ship classification society Germanischer Lloyd in Berlin. It is thanks to his commitment that Germanischer Lloyd not only kept statistics, but also demanded clear, scientifically based rules on safety issues. After the sinking of the express steamer Elbe in the North Sea, he wrote the regulations issued by the See-Berufsgenossenschaft in 1896 on the number and type of watertight bulkheads . The cooperation with the See-Berufsgenossenschaft was continued and resulted in regulations for the definition of a low-loading line, which concerned the permissible loading of the ships. In 1903 he introduced the bow net .

His last work on the masting and rigging of ships became a classic in shipbuilding literature .

Middendorf was for many years chairman of the Berlin district association of the VDI and a founding member of the Shipbuilding Society .


  • The steering devices of ocean-going vessels, especially the newer large steamers . In: Yearbook of the Shipbuilding Society 1 , 1900, pp. 143–267.
  • Resistance of ships and determination of work performance for ship machines . In: Yearbook of the Shipbuilding Society 1 , 1900, pp. 355–85.
  • Masting and rigging of the ships , Springer, Berlin 1903, reprint 1971 and Amsterdam 2005, ISBN 90-302-9654-2 .


Web links

Individual evidence

  1. Friedrich Ludwig Middendorf: masting and rigging of ships , Springer, Berlin 1903, reprinted in 1971 and Amsterdam in 2005, ISBN 90-302-9654-2 , p 137 f.