Recent Evolution in Problems and Methods in Aerodynamics

Abstract

The Tenth Lanchester Memorial Lecture “Recent Evolution in Problems and Methods in Aerodynamics” was given before the Society on 11th May 1967 by Professor Paul Germain, Director General of ONERA. The Chair was taken by the President, Mr. M. B. Morgan, CB, MA, CEng, FRAeS.Opening the proceedings the President said that they had had a memorable series of lectures in memory of that great man Lanchester and at many of them it had been a great pleasure to have with them his widow, and his brother Mr. George Lanchester and his wife. They were delighted to have them present that evening.They were fortunate to have as their lecturer Professor Germain, a distinguished French Scientist. It was particularly appropriate that their lecturer should come from France when Franco-British aeronautical ties were already close. Professor Germain was well known to the aeronautical research fraternity. Born at St. Malo in 1920, after graduating in Paris he joined ONERA and later became Professor at, first, Poitiers, then Lille and Paris. Since 1962 he had been Director of ONERA. His theoretical work in the transonic and supersonic aerodynamics fields was well known and they also knew him well personally because he had paid numerous visits to research centres in this country.Professor Germain was France’s National delegate to AGARD and Mr. Morgan knew from personal knowledge the intense interest Professor Germain had taken in that international organisation. He held an Honorary Doctorate from Louvain University, was a Correspondent of the Academy of Sciences, Paris, a Fellow of the American Institute of Aeronautics and Astronautics, a Foreign Honorary Member of the American Academy of Arts and Sciences and a member of the International Academy of Astronautics.

A correction to 'lifting-line theory as a singular perturbation problem.'

“…(5) can be evaluated easily. Taking its third derivative gives 1 d 3 f 1 --73 (1 -<7 2 )sgn(s -<r)log|s -a\ da -s 2 ) 1-s 2 (6) The first derivative of the remaining integral is evaluated by use of the finite-part method Following Heaslet and Lomax 4 :…”