[quote="greeney2"]I wish my Dad was still living, he was an Areonauticl engineer, and actually taught wind tunnel. The idea is interresting, but if the shape of the airfoil and surface finshing creates the drag, I'm tyring to picture any internal induced vibration or ultra sonic waves physically affecting the drag in on the air at all. Obviously the size of the wing is a function of the difference in air pressure in order to lift the weight. Any lighter material would result in needing a smaller wing, so in that sense total weight is less drag becasue the size required of the wing. Total surface area has to reduce drag.[/quote
Thanks for your interest.
Here is a crude analogy. Now I am NOT saying is how this works but just a an illustration as a mode of action.
You have noticed if you put a juice mixer or any thing with a motor on a flat hard surface how the object will tend to have less friction and move and if the table is at a slight incline it will glide down the incline or just move away from its original position.
THIS THIS SAME OBJECT WHICH AS QUITE HEAVY suddenly seems to have less friction due to the motor inside it and lets it slide horizontally more easily.
A second example is a drill which will tend to slide across a hard surface when switched on.
This piezo acoustic transducer method seems related although the mechanism is not clear as to how it works.The possible modes are explained in the INITIAL post.
Modern aircraft materiels are quite advanced and more flexible and may be amenable to using this to reduce drag and a huge saving in fuel which could add up worldwide to large amounts.
Remember most aircraft are already subject to vibration anyway but this vibration is structured/controlled.http://en.wikipedia.org/wiki/Piezoelectrichttp://www.piezo.com/tech2intropiezotrans.html