Interview with Hans W. Liepmann

An interview in three sessions, March 10 and 12, 1982, and March 30, 1983, with Hans W. Liepmann, director (1970-1985) of Caltech’s Graduate Aeronautical Laboratories (GALCIT), in the Division of Engineering and Applied Science. Dr. Liepmann received his PhD from the University of Zürich in 1938 and came to Caltech the following year as a research fellow to work with Theodore von Kármán, director of the Guggenheim Aeronautical Laboratory, as GALCIT was then known. He recalls his early education in Berlin during World War I, postwar inflation, and the rise of the Nazis; his family’s move to Istanbul in 1933; his studies at the University of Istanbul with Richard von Mises and Harry Dember; Prague’s German University; and Zürich with Edgar Meyer, Gregor Wentzel, and Richard Bär. Recalls his arrival at Caltech and his various GALCIT colleagues, particularly von Kármán and successor Clark Millikan. Comments on GALCIT’s relationship with U.S. aircraft industry during World War II; on Robert Millikan; on his work on turbulence, transonic flow, shockwave boundary interaction; on changes in GALCIT over the years; on teaching at Caltech and the difference between science education in the U.S. and Western Europe. Recalls the controversial deportation of Hsue-shen Tsien. Comments on consulting with Douglas Aircraft Company, on founding of the applied mathematics department, and on his ongoing unhappiness with Caltech’s direction, particularly its move toward the social sciences