Tests with the Arado Ar 234 prototypes demonstrated that straight wings retained their good aerodynamic characteristics only at speeds below 800 kph. Near-supersonic flights demanded a completely new approach to wing geometry. On 9th December 1942 two Arado company engineers, R diger Kosin and Walter Lehmann, patented a crescent shaped wing, which had its sweep and chord decreasing from root to tip. In mid-1944 Kosin decided to use his wing design...
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