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