I'm too lazy now to write more about aerodynamics...but, just to give some assistance wrt visualizing these concepts look up---[not wiki]....ZLA and CGT ...zero lift axis,....CoG track....that should help sort it out for everyone...not involved in
{injunearin}
Sorry guys, but that is not what I said. If you take moments about the point where the lift due to incidence acts then you will get a constant pitching moment as incidence varies and this point is generally close to 25% chord. So the aerodynamic centre is the location where the lift due to incidence acts and is independent of incidence (more or less).
Centre of pressure on the other hand varies with incidence. At zero lift the centre of pressure is at plus/minus infinity if there is any wing camber, because the pitching moment at zero lift is produced by a couple. As you increase incidence (and lift) the centre of pressure will move towards the 25% chord point but it will never get there.
CliveL,
Yes, the exact 3D rendering of the gross airfoil characteristics are indeed the summation of section charteristics along dy....
Folks, Pay a little more attention to this man...
