Dave,
Now you're starting to sound like Lu.
Well yes, I thought of Lu. But I am not going to worry about something like the 18 phase angle. I have flown the R22, it flies just fine. But I have also seen the pictures from the ATSB that show the fractured blade.
Robinson eliminated the bending loads with the invention of the tri-hinge, thats good.
If someone could eliminate the lead/lag loads with a more advanced invention, that would be even better.
I may use the tri-hinge.
or that A-160 hummingbird rotor head if I can ever figure how it works.