- The question as to the origin of lift is older than Newton who, himself, gave the wrong answer (see, for example, Toakaty ). The vortex theory of flight due to Zhukowsky , Kutta , Lanchester  and Prandtl , although doubted by few, appears to many so devoid of any direct experiential basis that there are constant attempts to understand why an aircraft really manages to remain aloft: the idea of a bound vortex with its circulation seems so passive, the explanation, so abstruse and complicated.
tisdag 18 september 2012
Kutta-Zhukovsky-Prandtl Devoid of Physics
David Auerbach starts out in Why Aircraft Fly by:
Read and contemplate! These are tough words about the Old Theory of Flight of Kutta-Zhukovsky-Prandtl. Are they true?