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The International Council of the Aeronautical Sciences (ICAS) is a worldwide institution, established as an international forum for individual national aeronautical professional associations.

It was formed on 29 January 1957 at a conference in the US.^[1] The first ICAS Congress was held in Spain in 1958. Frank Wattendorf, of AGARD, was the first Director.

A second meeting was held in Paris, with Hugh Latimer Dryden of the National Advisory Committee for Aeronautics, and representatives from ONERA (Office National d'Etudes et de Recherches Aérospatiales), the Royal Aeronautical Society (RAeS), the WGL (now the Deutsche Gesellschaft für Luft- und Raumfahrt), the Association Française des Ingénieurs et Techniciens de l'Aéronautique (now the Association Aéronautique et Astronautique de France), and the Aeronautical Research Institute of Sweden.

It holds a biennial international congress in September. In 1986 it was held in London. In 2000 the congress was held in North Yorkshire. The 2018 Congress was held by Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) in Brazil. The 2020 congress will be held in Shanghai, China.

• Raymond Bisplinghoff 1978
• Boris Laschka 1986
• Paolo Santini 1990
• Murray Scott 2013
• Christian Mari 2015
• Susan Ying 2017
• Shinji Suzuki 2017
• Dimitri Mavris 2023

The secretariat of ICAS is at Deutsche Gesellschaft für Luft- und Raumfahrt (DLR) in Bonn. It was first headquartered at the American Institute of Aeronautics and Astronautics (AIAA), the DLR from 1978, the RAeS in 1986, the Nederlandse Vereniging voor Luchtvaarttechniek from 1990, the AAAF (Association Aéronautique et Astronautique de France) from 1997, then Sweden from 2002, and Germany from January 2011.

• Council of European Aerospace Societies (CEAS)
• Fédération Aéronautique Internationale (FAI)
• International Astronautical Federation
• International Energy Forum

• ICAS
• ICAS 2020 Archived 2019-12-11 at the Wayback Machine