Hermann Föttinger

Hermann Föttinger ( born February 9, 1877 in Nuremberg, † April 28, 1945 in Berlin) was a German electrical engineer, inventor and university teachers.


Hermann Föttinger studied electrical engineering from 1895 to 1899 at the Technical University of Munich. In 1904 he received his doctorate in Munich with a dissertation on Effective machine performance and effective torque and their experimental determination, with special consideration of large marine engines. He then worked as chief designer at the shipyard AG Vulcan Stettin. The testing and introduction of new steam turbines was his area of ​​responsibility. During this time he developed the hydrodynamic torque converter ( summary of a pump and a turbine in a component, the Föttinger coupling ), which is used in its development, for example in automatic automotive transmission. In 1909 he was offered a professorship at the Technical University of Gdansk, where he established an Institute for Fluid Dynamics. In 1924 he was appointed to the Chair of Fluid Physics, and turbomachinery at the Technische Hochschule Berlin -Charlottenburg. Here he worked until his death by shrapnel in April 1945. His grave is in the cemetery Wilmersdorf.

Föttinger completed the transfer of the classical theoretical foundations of fluid mechanics by Leonhard Euler about William John Macquorn Rankine and Hermann von Helmholtz up to their current applications in the boundary layer, wing and Propulsionstheorie. Together with Franz Kruckenberg, he founded the trajectory -Gesellschaft mbH to build the Rail Zeppelin. Throughout his life he has applied for or acquired more than 100 patents.