I made some calculations.The results are not satisfactory.
I choice the undersling let left and right blade CG distances are equal:
If flap angle is 10 degree,blade CG distance moved 13.2 mm.
I do not think it can work well without lag hinges.
ps:some data I use for calculation.
e=794; blade CG distance from blade root (mm)
x=41.555; undersling (mm)
b=80; blade root distance from rotor head center (mm)
a=3; pre cone angle (degree)
t0.jpg
t1.jpg
001.jpg