After the very successful events in 2007 and 2009, the Hamburg University of Technology has been fully motivated to arrange the 3rd International Workshop on Aircraft System Technologies AST 2011, and again the organizers cordially welcome you to this extraordinary event of the aircraft community.Well-known international experts from industry, research institutes, and universities are meeting in Hamburg, one of the world's leading centers for civil aviation. Here R&D activities are promoted in different ways, for instance, by the joint initiative "Hamburg - The place for aviation" or by the "Luftfahrtcluster Metropolregion Hamburg", a German "Spitzencluster" sponsored by the Federal Ministry of Education and Research. The latter has been led to a unique collaborative network, where industry, universities, and government work closely together on innovative ideas and developments in the field of future aircrafts. Major objectives are to strengthen the region, to further improve employment, and to support Hamburg's worldwide recognition.