due to the outbreak of World War 1 (1914–1918), quickly forgotten. During this war he served in the Austrian Airforce, where he was able to acquire vast experience in flight and gained his pilots license of the FAI (No 2702 Austria). After the war, due to the restrictions posed by the contract of Versailles, Germany was banned from developing and building powered aeroplanes. Consequently, the Aachen Aerodynamics Institute had to concentrate on unpowered flight and therefore sailplanes and gliders. In order to fly and thereby test theories and observe their viability, some avid flying enthusiasts among the students founded in 1920, with Klemperer at the helm, the Academic Gliding Club, which still exists today. Klemperer was also working for Junkers Aachener Segelflugzeugbau, a glider manufacturer, which used the results obtained in the academic research in its designs. The result of the efforts is a glider based on a Junkers low-wing-monoplane aircraft design with airfoil wings called "Schwatze-Düvel" ("black devil" in Aachen dialect). Klemperer, competing at the Rhön-Rossitten Gesellschaft gliding competition with this glider, scored a distance record at his first attendance in 1920 with a flight of . The following year in 1921 with an improved design called "Blaue Maus", he surpassed with flight time the previous duration record of set by Orville Wright. As a consequence he was granted his gliding certificate, issued by the Association of German Model & Soaring Flight Clubs, with the serial No. 1, being the very first glider certificate ever issued worldwide. After his promotion and emigration to the US in 1924 he continued with his passion for gliding or soaring flight. Soon after his arrival in the US he founded a gliding group. He made his first long-distance flight on the first high-performance sailplane ever built in the US. From the foundation of the Soaring Society of America he was for many years its director and honorary vice president. He was chairman of the Southern Californian Soaring Association and later its honorary president. As chief engineer of planning and operations to the Sierra Wave Project he did fundamental research into standing-wave phenomena. Scientific projects The following list shows a most likely non-complete list of Klemperer's scientific projects and co-operations. There may have been others, which the author was unable to find. If a reader is aware of any more, feel free to amend. References External links Some Properties of Rosette Configurations of Gravitating