Dave
Yes and .... no
I agree with your general definitions but I did not see a precise coordinate reference
The reference I choose is :
1. Project everything to the HP plane (= perpendicular to MR axis)
2. Reduce(=project) all flow-speed components a foil section sees to that reference plane (= rotational speed, inflow of air (aircraft motion+induction), flap and when fully dynamic rotor pitch and roll rates)
3. Calculate foil drag and lift with respect to that inflow angle
4. Induced drag is then defined by the angle of that vector makes with respect to the HP-plane
d3