 On a conference in Rome in 1935 Ackeret presented a design for a supersonic wind tunnel.Ackeret was awarded the Ludwig-Prandtl-Ring from the Deutsche Gesellschaft für Luft- und Raumfahrt (German Society for Aeronautics and Astronautics) for "outstanding contribution in the field of aerospace engineering" in 1965.In 1976, he was elected foreign associate member of the American National Academy of Engineering for his "contributions to the understanding of high-speed and supersonic fluid mechanics, leading to significant improvements to the science of flight".