{TAIL ~ The rotor blade} of this invention has a tip to tip flex beam spar and {HEAD ~ torsionally stiff hollow blades} bonded to the spar throughout the tip most portion of the blades 
{ TAIL ~ The rotor blade } of this invention has a tip to tip flex beam spar and { HEAD ~ torsionally stiff hollow blades } bonded to the spar throughout the tip most portion of the blades
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH