The rotor assembly 7, wherein {TAIL ~ the collective control linkage} for each of {HEAD ~ the blades} comprises: 
The rotor assembly 7 , wherein { TAIL ~ the collective control linkage } for each of { HEAD ~ the blades } comprises :
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH