Page "Area rule" Paragraph 9

The area rule was discovered by Otto Frenzl when comparing a swept wing with a w-wing with extreme high wave drag while working on a transonic wind tunnel at Junkers works in Germany between 1943 and 1945.

He wrote a description on 17 December 1943, with the title " Arrangement of Displacement Bodies in High-Speed Flight "; this was used in a patent filed in 1944.

The results of this research were presented to a wide circle in March 1944 by Theodor Zobel at the " Deutsche Akademie der Luftfahrtforschung " ( German Academy of Aeronautics Research ) in the lecture " Fundamentally new ways to increase performance of high speed aircraft.