ORIGINAL: HarryC
ORIGINAL: tomfiorentino
The down aileron increases camber, ......... up aileron decreases camber,
Not with a symmetrical section, aileron in any direction increases camber for both wings, yet symmetrical wings still get adverse yaw. Forget aileron differential, it's a model fliers myth, that's why fullsize planes designed by very clever people who actually know what they are doing, don't bother with it.
I agree with the increased camber in both directions on a symetrical section. But as you know, in order for a symetrical section to create lift in the first place, in needs AOA. And in that instance, aileron deflection still contributes toadverse yaw.
As I am sure you know, at the end of the day, ailerons bank an airplane by increasing lift onone half of the wing relative to the other half. I don't know how lift can increase without also increasing drag. More lift on one sided equals more drag on same side equals a contribution toward adverse yaw. Percentages I don't know.
It's not new that this isone of those aerodynamic items in constant change as AOA, air velocity and relative wind are in a constant state of flux. As usual, it's never ONE thing...always several...and I'm sure the percentage allocation betweendrag vs lift tiltcontributing for the total yaw will change accordingly on the same airplane.
Tom