Aileron rigging question
On a recent flight (as SLF) in an Airbus 319 in cruise I noticed that both ailerons were deflected up by about 3 or 4 degrees. I can appreciate why this is a good idea for drag reduction when at high speed when not all the lift generated by the wing is needed to maintain level flight and if the angle of attack on the whole wing was reduced by pitching the nose down the fuselage then would be at a sub-optimal angle.
The question is how are the ailerons controlled, and at what range of airspeeds/Mach nos does it work? At approach speeds the ailerons seemed to follow the camber of the wing and behave normally, without droop.
I'd be interested to know how this works; the aeroplanes I used to fly were never as clever - no FBW!
MB