Originally Posted by
SunofAtom
Interesting, so it does seem to be related to the start of dissymmetry of lift.
The advancing blade gets increased lift due to it 'seeing' higher relative airspeed. In a counter clockwise rotor this starts around the 5 o'clock position. from then on the blade will see higher lift than on the opposite (retreating) side. The max increase of lift will be on the 3 o'clock position. After that the increase will reduce (but the delta of lift force to the opposite blade will still be positive, i.e. the blade will still continue to rise, only at a lower rate). Even at the 1 o' clock position it will see higher relative airspeed and thus lift than on the opposite side. So up to beyond the 1 o' clock position there will still be higher lifting force compared to the opposite blade and will thereby lift the advancing blade. The net decrease of lift will start at 12 o'clock. Thus the apogee of the blade track will be beyond 12 o' clock. And that is not yet including inertia. Just net lift forces