High Quality Content by WIKIPEDIA articles! Jan Roskam (born February 22, 1930, The Hague) is the emeritus Deane E. Ackers Distinguished Professor of Aerospace Engineering at the University of Kansas. He is the author of eleven books on airplane design and flight dynamics and over 160 papers on the topics of aircraft aerodynamics, performance, design and flight controls. He founded the company DARcorporation with Willem Anemaat.