XCVI.Extensions of the new family of wing profiles

One hundred years of aeronautics in East London

“…Reference 107 then sets out how the selection of various inversion points changes the shape and maximum thickness point of the section generated, how generation can be easily achieved by mechanicographical means and the conformal transformation steps necessary to relate the velocity and pressure fields about such sections to those of the known potential flow about a circular cylinder. Piper (108) then took these ideas further, concentrating on two aspects. Noting that current research on high-subsonic flow suggested the desirability of small nose radii, he explained how the design process for the new sections of Ref.…”

“…The results of this method, and a combination of it with that of von Kármán-Pohlhausen, show remarkable accuracy. In 1949 Piercy and Whitehead (135) finally published the work which Piercy had stated as with generalisations of the earlier methods of aerofoil design (107)(108)(109) which now allow a far greater degree of sophistication to be achieved; some of the features described appeared in post-war editions of Ref. 93.…”