Perhaps the doubters could address the following situations (which appear to me to be similar from one perspective or another) ?
(a) auto-rotating helo rotors
(b) jet engine net thrust analyses (ie, considering the internal flow forces developed on the housings - especially for the intake region)
(c) research which has investigated the way some fish can use body flow generated vortices to provide a serving of additional thrust .... by having lateral oscillations of the tail being at the "correct" frequency to match the passage of vortices shed from the body ...
Not at all trying to be provocative here as my aerodynamicist days are far in the past ... but the issue is of some importance and I wouldn't mind knowing what current thinking is in the backroom trade ....
While I haven't had the pleasure of a beer with Mad (Flt) Scientist, his credentials suggest that we should give him some air to explain his views ... ?
Last edited by john_tullamarine; 7th Jul 2004 at 19:54.